Scholars@Duke
Eve M Vavagiakis

Eve M Vavagiakis

Assistant Professor of Physics
Physics

Selected Publications

Backlighting extended gas halos around luminous red galaxies: Kinematic Sunyaev-Zel’dovich effect from DESI Y1 and ACT data

Journal Article Physical Review D · November 7, 2025 The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel’dovich effect (kSZ). We precisely measure this effect (S=N ≈ 10) via vel ... Full text Cite

Evidence for large baryonic feedback at low and intermediate redshifts from kinematic Sunyaev-Zel’dovich observations with ACT and DESI photometric galaxies

Journal Article Physical Review D · October 6, 2025 Recent advances in cosmological observations have provided an unprecedented opportunity to investigate the distribution of baryons relative to the underlying matter. In this work, we show that the gas is more extended than the dark matter, and the amount o ... Full text Cite

Simons Observatory: Characterization of the Large Aperture Telescope Receiver

Journal Article Astrophysical Journal Supplement Series · August 1, 2025 The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42 m small-aperture telescopes and one 6 m large-aperture telescope (LAT), located at an elevation of 5200 m in the Atacama ... Full text Cite

The Simons Observatory: science goals and forecasts for the enhanced Large Aperture Telescope

Journal Article Journal of Cosmology and Astroparticle Physics · August 1, 2025 We describe updated scientific goals for the wide-field, millimeter-wave survey that will be produced by the Simons Observatory (SO). Significant upgrades to the 6-meter SO Large Aperture Telescope (LAT) are expected to be complete by 2028, and will includ ... Full text Cite

The Atacama Cosmology Telescope: Large-scale velocity reconstruction with the kinematic Sunyaev-Zel'dovich effect and DESI LRGs

Journal Article Journal of Cosmology and Astroparticle Physics · May 1, 2025 The kinematic Sunyaev-Zel'dovich (kSZ) effect induces a non-zero density-density-temperature bispectrum, which we can use to reconstruct the large-scale velocity field from a combination of cosmic microwave background (CMB) and galaxy density measurements, ... Full text Cite

280-GHz aluminum MKID arrays for the Fred Young Submillimeter Telescope

Journal Article Journal of Astronomical Telescopes Instruments and Systems · April 1, 2025 First light observations of the 280-GHz instrument module of the Fred Young Submillimeter Telescope in the CCAT Collaboration are expected in 2026. The focal plane of this module will consist of three superconducting microwave kinetic inductance detector ( ... Full text Cite

Constraining cosmological parameters using the pairwise kinematic Sunyaev-Zel'dovich effect with CMB-S4 and future galaxy cluster surveys

Journal Article Physical Review D · March 15, 2025 We present a forecast of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) measurement that will be achievable with the future CMB-S4 experiment. CMB-S4 is the next stage for ground-based cosmic microwave background experiments, with a planned wide-area surv ... Full text Cite

CCAT: LED Mapping and Characterization of the 280 GHz TiN KID Array

Journal Article IEEE Transactions on Applied Superconductivity · January 1, 2025 Prime-Cam, one of the primary instruments for the Fred Young Submillimeter Telescope (FYST) developed by the CCAT Collaboration, will house up to seven instrument modules, with the first operating at 280 GHz. Each module will include three arrays of superc ... Full text Cite

Simons Observatory: Predeployment Performance of a Large Aperture Telescope Optics Tube in the 90 and 150 GHz Spectral Bands

Journal Article Astrophysical Journal Supplement Series · January 1, 2025 The Simons Observatory will map the temperature and polarization over half of the sky at millimeter wavelengths in six spectral bands from the Atacama Desert in Chile. These data will provide new insights into the genesis, content, and history of our Unive ... Full text Cite

The Simons Observatory: Design, Integration, and Testing of the Small Aperture Telescopes

Journal Article Astrophysical Journal Supplement Series · October 1, 2024 The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert in Chile. The SO SATs will cover six spectral bands between 27 and 280 ... Full text Cite

The Atacama Cosmology Telescope: Reionization kSZ trispectrum methodology and limits

Journal Article Monthly Notices of the Royal Astronomical Society · August 1, 2024 Patchy reionization generates kinematic Sunyaev–Zel’dovich (kSZ) anisotropies in the cosmic microwave background (CMB). Large-scale velocity perturbations along the line of sight modulate the small-scale kSZ power spectrum, leading to a trispectrum (or fou ... Full text Cite

The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids

Journal Article Astrophysical Journal · April 1, 2024 We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg2 of the sky using data from 2017 to 2021. We utilize high cadence maps, which can be us ... Full text Cite

The Atacama cosmology telescope: flux upper limits from a targeted search for extragalactic transients

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2024 We have performed targeted searches of known extragalactic transient events at millimetre wavelengths using nine seasons (2013–2021) of 98, 150, and 229 GHz Atacama Cosmology Telescope (ACT) observations that mapped ∼40 per cent of the sky for most of the ... Full text Cite

Atacama Cosmology Telescope: High-resolution component-separated maps across one third of the sky

Journal Article Physical Review D · March 15, 2024 Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-y distortion due to the thermal Sunyaev-Zel'dovich (tSZ) effect. Extracti ... Full text Cite

The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters

Journal Article Astrophysical Journal · February 1, 2024 We present cosmological constraints from a gravitational lensing mass map covering 9400 deg2 reconstructed from measurements of the cosmic microwave background (CMB) made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In combination ... Full text Cite

Pairwise kinematic Sunyaev-Zel'dovich signal extraction efficacy and optical depth estimation

Journal Article Physical Review D · January 15, 2024 We determine the efficacy of the kinematic Sunyaev-Zel'dovich (kSZ) signal extraction pipeline, using pairwise kSZ measurements, in recovering unbiased estimates of the signal and inference of the associated optical depth. We consider the impact of cluster ... Full text Cite

CCAT: FYST Prime-Cam Readout Software: A framework for massively scalable KID arrays

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 We outline the development of the readout software for the Prime-Cam and Mod-Cam instruments on the CCAT Fred Young Submillimeter Telescope (FYST), primecam readout. The instruments feature lumped-element kinetic inductance detector (LEKID) arrays driven b ... Full text Cite

CCAT: Nonlinear effects in 280 GHz aluminum kinetic inductance detectors

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 Prime-Cam, a first-generation science instrument for the Atacama-based Fred Young Submillimeter Telescope, is being built by the CCAT Collaboration to observe at millimeter and submillimeter wavelengths using kinetic inductance detectors (KIDs). Prime-Cam' ... Full text Cite

CCAT: Design and initial measurements of densely packed, high-frequency, dual-polarization kinetic inductance detectors for the Prime-Cam 850 GHz module

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 Prime-Cam is a first-generation instrument designed for the Fred Young Submillimeter Telescope (FYST) in the Cerro Chajnantor Atacama Telescope (CCAT) Facility. Among the instrument modules being developed for the Prime-Cam receiver, the highest frequency ... Full text Cite

CCAT: Prime-Cam Optics Overview and Status Update

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 Prime-Cam is a first-generation science instrument for the CCAT Observatory's six-meter aperture Fred Young Submillimeter Telescope (FYST). FYST's crossed-Dragone design provides high optical throughput to take advantage of its unique site at 5600 m on Cer ... Full text Cite

CCAT: Characterizing the Fabry-Pérot Interferometer Mirrors and Mount for the Epoch of Reionization Spectrometer

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Epoch of Reionization Spectrometer (EoR-Spec) is an instrument module with unique spectroscopic capabilities within the Prime-Cam receiver on the Fred Young Submillimeter Telescope (FYST), a forthcoming six-meter aperture telescope to be situated on Ce ... Full text Cite

CCAT: A status update on the EoR-Spec instrument module for Prime-Cam

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Epoch of Reionization Spectrometer (EoR-Spec) is an upcoming Line Intensity Mapping (LIM) instrument designed to study the evolution of the early universe (z = 3.5 to 8) by probing the redshifted [CII] 158 µm fine-structure line from aggregates of gala ... Full text Cite

The Simons Observatory: Studies of Detector Yield and Readout Noise From the First Large-Scale Deployment of Microwave Multiplexing at the Large Aperture Telescope

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Simons Observatory is a new ground-based cosmic microwave background experiment, which is currently being commissioned in Chile's Atacama Desert. During its survey, the observatory's small aperture telescopes will map 10% of the sky in bands centered a ... Full text Cite

Thermal and mechanical study of a parametrised cryostat model for optical characterisation of upcoming CMB experiments

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 Current and future experiments observing the cosmic microwave background require a detailed understanding of optical performance at cryogenic temperatures. Pre-deployment analysis of optics can be performed in custom-engineered cryogenic test beds, such as ... Full text Cite

CCAT: Detector Noise Limited Performance of the RFSoC-based Readout Electronics for mm/sub-mm/far-IR KIDs

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2024 The Fred Young Submillimeter Telescope (FYST), on Cerro Chajnantor in the Atacama desert of Chile, will conduct wide-field and small deep-field surveys of the sky with more than 100,000 detectors on the Prime-Cam instrument. Kinetic inductance detectors (K ... Full text Cite

The Atacama Cosmology Telescope: map-based noise simulations for DR6

Journal Article Journal of Cosmology and Astroparticle Physics · November 1, 2023 The increasing statistical power of cosmic microwave background (CMB) datasets requires a commensurate effort in understanding their noise properties. The noise in maps from ground-based instruments is dominated by large-scale correlations, which poses a m ... Full text Cite

The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps

Journal Article Astrophysical Journal · October 1, 2023 We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered f ... Full text Cite

Kinematic Sunyaev-Zel'dovich effect with ACT, DES, and BOSS: A novel hybrid estimator

Journal Article Physical Review D · July 15, 2023 The kinematic and thermal Sunyaev-Zel'dovich (kSZ and tSZ) effects probe the abundance and thermodynamics of ionized gas in galaxies and clusters. We present a new hybrid estimator to measure the kSZ effect by combining cosmic microwave background temperat ... Full text Cite

Erratum: Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel'dovich measurements (Phys. Rev. D (2021) 103 (063514) DOI: 10.1103/PhysRevD.103.063514)

Journal Article Physical Review D · February 15, 2023 We have identified an error in the algorithm that calculates the kSZ temperature profile, TkSZ , for a given generalized Navarro-Frenk-White (GNFW) density model or a simulated density profile. This error changes the value of log 10 ? 0 by 0.75 s in Table ... Full text Cite

CCAT-prime Collaboration: Science Goals and Forecasts with Prime-Cam on the Fred Young Submillimeter Telescope

Journal Article Astrophysical Journal Supplement Series · January 1, 2023 We present a detailed overview of the science goals and predictions for the Prime-Cam direct-detection camera-spectrometer being constructed by the CCAT-prime collaboration for dedicated use on the Fred Young Submillimeter Telescope (FYST). The FYST is a w ... Full text Cite

Simons Observatory Focal-Plane Module: In-lab Testing and Characterization Program

Journal Article Journal of Low Temperature Physics · December 1, 2022 The Simons Observatory is a ground-based cosmic microwave background instrument to be sited in the Atacama Desert in Chile. SO will deploy 60,000 transition-edge sensors (TES) bolometers in 49 separate focal-plane modules across a suite of four telescopes ... Full text Cite

CCAT-Prime: Characterization of the First 280 GHz MKID Array for Prime-Cam

Journal Article Journal of Low Temperature Physics · December 1, 2022 The Prime-Cam receiver on the Fred Young Submillimeter Telescope for the CCAT-prime project aims to address important astrophysical and cosmological questions with sensitive broadband, polarimetric, and spectroscopic measurements. The primary frequency ban ... Full text Cite

The Simons Observatory 220 and 280 GHz Focal-Plane Module: Design and Initial Characterization

Journal Article Journal of Low Temperature Physics · December 1, 2022 The Simons Observatory (SO) will detect and map the temperature and polarization of the millimeter-wavelength sky from Cerro Toco, Chile, across a range of angular scales, providing rich data sets for cosmological and astrophysical analysis. The SO focal p ... Full text Cite

The Simons Observatory: Magnetic Shielding Measurements for the Universal Multiplexing Module

Journal Article Journal of Low Temperature Physics · November 1, 2022 The Simons Observatory (SO) includes four telescopes that will measure the temperature and polarization of the cosmic microwave background using over 60,000 highly sensitive transition-edge bolometers (TES). These multichroic TES bolometers are read out by ... Full text Cite

Magnetic Field Sensitivity of Microwave SQUID Multiplexers

Journal Article Journal of Low Temperature Physics · November 1, 2022 We present magnetic field sensitivity measurements of microwave SQUID multiplexers designed for bolometric applications. These devices are often used in environments with changing external magnetic fields, due to either motion through Earth’s field or radi ... Full text Cite

Atacama Cosmology Telescope: Constraints on prerecombination early dark energy

Journal Article Physical Review D · June 15, 2022 The early dark energy (EDE) scenario aims to increase the value of the Hubble constant (H0) inferred from cosmic microwave background (CMB) data over that found in the standard cosmological model (ΛCDM), via the introduction of a new form of energy density ... Full text Cite

CCAT-prime: RFSoC based readout for frequency multiplexed kinetic inductance detectors

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Prime-Cam instrument on the Fred Young Submillimeter Telescope (FYST) is expected to be the largest deployment of millimeter and submillimeter sensitive kinetic inductance detectors to date. To read out these arrays efficiently, a microwave frequency m ... Full text Cite

Ccat-prime: design of the mod-cam receiver and 280 ghz mkid instrument module

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 Mod-Cam is a first light and commissioning instrument for the CCAT-prime project's six-meter aperture Fred Young Submillimeter Telescope (FYST), currently under construction at 5600 m on Cerro Chajnantor in Chile's Atacama Desert. Prime-Cam, a first-genera ... Full text Cite

CCAT-prime: The design of the epoch of reionization spectrometer detector arrays

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The epoch of reionization spectrometer (EoR-Spec) is an instrument module that will be deployed in the Prime-Cam receiver on the Fred Young Submillimeter Telescope (FYST), which is a 6m off-Axis telescope for the CCAT-prime facility. FYST is currently bein ... Full text Cite

CCAT-prime/FYST: a status report on the ultra-widefield submillimeter observatory on Cerro Chajnantor

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 We report on the CCAT-prime Project, including the science program, the Fred Young Submillimeter Telescope (FYST), its instrumentation, and the schedule. FYST is a 6-m telescope sited at 5600 m elevation near the summit of Cerro Chajnantor in northern Chil ... Full text Cite

CCAT-prime: The epoch reionization spectrometer for primce-cam on FYST

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Fred Young Submillimeter Telescope (FYST), which is the telescope of the CCAT-prime project, will be located at 5600 m near the summit of Cerro Chajnantor in northern Chile, and will host the modular instrument called Prime-Cam. Two of the instrument m ... Full text Cite

CCAT-prime: The design and characterization of the silicon mirrors for the Fabry-Perot interferometer in the Epoch of reionization spectrometer

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Epoch of Reionization Spectrometer (EoR-Spec) is one of the instrument modules to be installed in the Prime-Cam receiver of the Fred Young Submillimeter Telescope (FYST). This six-meter aperture telescope will be built on Cerro Chajnantor in the Atacam ... Full text Cite

Ccat-prime: the optical design for the epoch of reionization spectrometer

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Epoch of Reionization Spectrometer (EoR-Spec) will be an instrument module for the Prime-Cam receiver on the CCAT-prime Collaboration's Fred Young Submillimeter Telescope (FYST), a 6-m primary mirror Crossed Dragone telescope. With its Fabry-Perot inte ... Full text Cite

CCAT-prime: Optical and cryogenic design of the 850 GHz module for Prime-Cam

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 Prime-Cam is a first-generation instrument for the Cerro Chajnantor Atacama Telescope-prime (CCAT-prime) Facility. The 850 GHz module for Prime-Cam will probe the highest frequency of all the instrument modules. We describe the parameter space of the 850 G ... Full text Cite

Ccat-prime: the 850 ghz camera for prime-cam on fyst

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Fred Young Submillimeter Telescope (FYST) at the Cerro-Chajnantor Atacama Telescope prime (CCATprime) Facility will host Prime-Cam as a powerful, first generation camera with imaging polarimeters working at several wavelengths and spectroscopic instrum ... Full text Cite

Erratum: The Simons Observatory Large Aperture Telescope Receiver (ApJS (2021) 256: 23 DOI: 10.3847/1538-4365/ac0db7)

Journal Article Astrophysical Journal Supplement Series · December 1, 2021 After the publication of the article, it was brought to our attention that the description of Equation (1) may cause potential confusion. Thus, we have decided to provide a newer reference and added a unit for qtot in the description. The updated paragraph ... Full text Cite

The Simons Observatory Microwave SQUID Multiplexing Detector Module Design

Journal Article Astrophysical Journal · November 20, 2021 Advances in cosmic microwave background (CMB) science depend on increasing the number of sensitive detectors observing the sky. New instruments deploy large arrays of superconducting transition-edge sensor (TES) bolometers tiled densely into ever larger fo ... Full text Cite

The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

Journal Article Astrophysical Journal · October 10, 2021 We present arcminute-resolution intensity and polarization maps of the Galactic center made with the Atacama Cosmology Telescope. The maps cover a 32 deg2 field at 98, 150, and 224 GHz with |l| ≤ 4 , |b| ≤ 2 . We combine these data with Planck observations ... Full text Cite

The Simons Observatory Large Aperture Telescope Receiver

Journal Article Astrophysical Journal Supplement Series · September 1, 2021 The Simons Observatory is a ground-based cosmic microwave background experiment that consists of three 0.4 m small-aperture telescopes and one 6 m Large Aperture Telescope, located at an elevation of 5300 m on Cerro Toco in Chile. The Simons Observatory La ... Full text Cite

Atacama Cosmology Telescope measurements of a large sample of candidates from the Massive and Distant Clusters of WISE Survey: Sunyaev-Zeldovich effect confirmation of MaDCoWS candidates using ACT

Journal Article Astronomy and Astrophysics · September 1, 2021 Context. Galaxy clusters are an important tool for cosmology, and their detection and characterization are key goals for current and future surveys. Using data from the Wide-field Infrared Survey Explorer (WISE), the Massive and Distant Clusters of WISE Su ... Full text Cite

The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

Journal Article Physical Review D · August 15, 2021 We present a detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Resul ... Full text Cite

The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

Journal Article Physical Review D · August 15, 2021 We present measurements of the average thermal Sunyaev Zel’dovich (tSZ) effect from optically selected galaxy groups and clusters at high signal-to-noise (up to ) and estimate their baryon content within a radius aperture. Sources from the Sloan Digital Sk ... Full text Cite

Is the electric potential physical?

Other Physics Today · August 1, 2021 Full text Cite

The Simons Observatory: Magnetic Sensitivity Measurements of Microwave SQUID Multiplexers

Journal Article IEEE Transactions on Applied Superconductivity · August 1, 2021 The Simons Observatory (SO) will be a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field $\sim$70,000 trans ... Full text Cite

In Situ Performance of the Low Frequency Array for Advanced ACTPol

Journal Article IEEE Transactions on Applied Superconductivity · August 1, 2021 The AdvancedAtacama Cosmology Telescope Polarimeter (AdvACT) [1] is an upgrade for the Atacama Cosmology Telescope using Transition Edge Sensor (TES) detector arrays to measure cosmic microwave background (CMB) temperature and polarization anisotropies in ... Full text Cite

Atacama Cosmology Telescope: Combined kinematic and thermal Sunyaev-Zel'dovich measurements from BOSS CMASS and LOWZ halos

Journal Article Physical Review D · March 15, 2021 The scattering of cosmic microwave background (CMB) photons off the free-electron gas in galaxies and clusters leaves detectable imprints on high resolution CMB maps: the thermal and kinematic Sunyaev-Zel'dovich effects (tSZ and kSZ respectively). We use c ... Full text Cite

Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel'dovich measurements

Journal Article Physical Review D · March 15, 2021 The thermal and kinematic Sunyaev-Zel'dovich effects (tSZ, kSZ) probe the thermodynamic properties of the circumgalactic and intracluster medium (CGM and ICM) of galaxies, groups, and clusters, since they are proportional, respectively, to the integrated e ... Full text Cite

The Atacama Cosmology Telescope: Arcminute-resolution maps of 18 000 square degrees of the microwave sky from ACT 2008–2018 data combined with Planck

Journal Article Journal of Cosmology and Astroparticle Physics · December 1, 2020 This paper presents a maximum-likelihood algorithm for combining sky maps with disparate sky coverage, angular resolution and spatially varying anisotropic noise into a single map of the sky. We use this to merge hundreds of individual maps covering the 20 ... Full text Cite

The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Journal Article Astrophysical Journal Letters · November 1, 2020 We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology T ... Full text Cite

Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Journal Article Physical Review D · July 15, 2020 Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separa ... Full text Cite

Sensitivity of the Prime-Cam Instrument on the CCAT-Prime Telescope

Journal Article Journal of Low Temperature Physics · May 1, 2020 CCAT-prime is a new 6 m crossed Dragone telescope designed to characterize the cosmic microwave background (CMB) polarization and foregrounds, measure the Sunyaev–Zel’dovich effects of galaxy clusters, map the [CII] emission intensity from the epoch of rei ... Full text Cite

Simons Observatory Microwave SQUID Multiplexing Readout: Cryogenic RF Amplifier and Coaxial Chain Design

Journal Article Journal of Low Temperature Physics · May 1, 2020 The Simons Observatory (SO) is an upcoming polarization-sensitive cosmic microwave background experiment on the Cerro Toco Plateau (Chile) with large overlap with other optical and infrared surveys (e.g., DESI, LSST, HSC). To enable the readout of O(10,000 ... Full text Cite

Assembly and Integration Process of the High-Density Detector Array Readout Modules for the Simons Observatory

Journal Article Journal of Low Temperature Physics · May 1, 2020 The Simons Observatory will measure the cosmic microwave background temperature and polarization using a suite of new telescopes in the Atacama Desert in Chile.The Simons Observatory will use dichroic transition edge sensor (TES) bolometer arrays spanning ... Full text Cite

Characterization of Transition Edge Sensors for the Simons Observatory

Journal Article Journal of Low Temperature Physics · May 1, 2020 The Simons Observatory is building both large (6 m) and small (0.5 m) aperture telescopes in the Atacama Desert in Chile to observe the cosmic microwave background CMB radiation with unprecedented sensitivity. Simons Observatory telescopes in total will us ... Full text Cite

Commercially Fabricated Antenna-Coupled Transition Edge Sensor Bolometer Detectors for Next-Generation Cosmic Microwave Background Polarimetry Experiment

Journal Article Journal of Low Temperature Physics · May 1, 2020 We report on the development of commercially fabricated multi-chronic antenna-coupled transition edge sensor (TES) bolometer arrays for cosmic microwave background (CMB) polarimetry experiments. The orders of magnitude increase in detector count for next-g ... Full text Cite

The Design of the CCAT-prime Epoch of Reionization Spectrometer Instrument

Journal Article Journal of Low Temperature Physics · May 1, 2020 The epoch of reionization spectrometer (EoR-Spec) is an instrument module for the Prime-Cam receiver of the 6-m aperture CCAT-prime Telescope at 5600 m in Chile. EoR-Spec will perform 158 μ m [CII] line intensity mapping of star-forming regions at redshift ... Full text Cite

Developing AlMn Films for Argonne TES Fabrication

Journal Article Journal of Low Temperature Physics · April 1, 2020 The reference design for the next-generation cosmic microwave background (CMB) experiment, CMB-S4, relies on large arrays of transition-edge sensor (TES) bolometers coupled to Superconducting Quantum Interference Device (SQUID)-based readout systems. Mappi ... Full text Cite

Development of an optical detector testbed for the Simons Observatory

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment with three small-Aperture telescopes and one large-Aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 transition ... Full text Cite

The integration and testing program for the Simons Observatory Large Aperture Telescope optics tubes

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The Simons Observatory (SO) will be a CMB survey experiment with three small-Aperture telescopes and one large-Aperture telescope (the LAT), which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 TES bolometers in six spec ... Full text Cite

Comparing complex impedance and bias step measurements of Simons Observatory transition edge sensors

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The Simons Observatory (SO) will perform ground-based observations of the cosmic microwave background (CMB) with several small and large aperture telescopes, each outfitted with thousands to tens of thousands of superconducting aluminum manganese (AlMn) tr ... Full text Cite

The Simons Observatory: The Large Aperture Telescope Receiver (LATR) integration and validation results

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5m Small Aperture Telescopes (SATs) and one 6m Large Aperture Telescope (LAT), covering six f ... Full text Cite

Assembly development for the Simons Observatory focal plane readout module

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The Simons Observatory is a suite of instruments sensitive to temperature and polarization of the cosmic microwave background. Five telescopes will host over 60,000 highly multiplexed transition edge sensor (TES) detectors. The universal focal plane module ... Full text Cite

CCAT-prime: Designs and status of the first light 280 GHz MKID array and mod-cam receiver

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The CCAT-prime project's first light array will be deployed in Mod-Cam, a single-module testbed and first light cryostat, on the Fred Young Submillimeter Telescope (FYST) in Chile's high Atacama desert in late 2022. FYST is a six-meter aperture telescope b ... Full text Cite

Optical design study for the 860 GHz first-light camera module of CCAT-p

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2020 The CCAT-prime telescope, also known as the Fred Young Submillimeter Telescope (FYST), has an unblocked 6-m aperture designed for an extraordinarily wide field-of-view to be used in cosmological and galactic studies. Located at 5600 m near ALMA, the site h ... Full text Cite

The Advanced ACTPol 27/39 GHz Array

Journal Article Journal of Low Temperature Physics · December 1, 2018 Advanced ACTPol (AdvACT) will observe the temperature and polarization of the cosmic microwave background (CMB) at multiple frequencies and high resolution to place improved constraints on inflation, dark matter, and dark energy. Foregrounds from synchrotr ... Full text Cite

Advanced ACTPol Low-Frequency Array: Readout and Characterization of Prototype 27 and 39 GHz Transition Edge Sensors

Journal Article Journal of Low Temperature Physics · December 1, 2018 Advanced ACTPol (AdvACT) is a third-generation polarization upgrade to the Atacama Cosmology Telescope, designed to observe the cosmic microwave background (CMB). AdvACT expands on the 90 and 150 GHz transition edge sensor (TES) bolometer arrays of the ACT ... Full text Cite

Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays

Journal Article Journal of Low Temperature Physics · November 1, 2018 The Advanced ACTPol (AdvACT) upgrade to the Atacama Cosmology Telescope (ACT) features arrays of aluminum manganese transition-edge sensors (TESes) optimized for ground-based observations of the cosmic microwave background (CMB). Array testing shows highly ... Full text Cite

Magnetic Sensitivity of AlMn TESes and Shielding Considerations for Next-Generation CMB Surveys

Journal Article Journal of Low Temperature Physics · November 1, 2018 In the next decade, new ground-based cosmic microwave background (CMB) experiments such as Simons Observatory, CCAT-prime, and CMB-S4 will increase the number of detectors observing the CMB by an order of magnitude or more, dramatically improving our under ... Full text Cite

The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev-Zel'dovich Effect Selected Cluster Catalog

Journal Article Astrophysical Journal Supplement Series · March 1, 2018 We present a catalog of 182 galaxy clusters detected through the Sunyaev-Zel'dovich (SZ) effect by the Atacama Cosmology Telescope in a contiguous 987.5 deg2 field. The clusters were detected as SZ decrements by applying a matched filter to 148 ... Full text Cite

Optimizing the efficiency of Fabry-Perot interferometers with silicon-substrate mirrors

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 We present the novel design of microfabricated, silicon-substrate based mirrors for use in cryogenic Fabry-Perot Interferometers (FPIs) for the mid-IR to sub-mm/mm wavelength regime. One side of the silicon substrate will have a double-layer metamaterial a ... Full text Cite

Simons Observatory large aperture receiver simulation overview

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory (SO) will make precision temperature and polarization measurements of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales between one arcminute and tens of degrees, contain over 60,000 d ... Full text Cite

Simons Observatory large aperture telescope receiver design overview

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory (SO) will make precision temperature and polarization measurements of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales between one arcminute and tens of degrees and sample frequencies ... Full text Cite

Studies of Systematic uncertainties in the Simons Observatory: Optical effects and sensitivity considerations

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory (SO) is a new experiment that aims to measure the cosmic microwave background (CMB) in temperature and polarization. SO will measure the polarized sky over a large range of microwave frequencies and angular scales using a combination ... Full text Cite

Designs for next generation CMB survey strategies from Chile

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 New telescopes are being built to measure the Cosmic Microwave Background (CMB) with unprecedented sensitivity, including Simons Observatory (SO), CCAT-prime, the BICEP Array, SPT-3G, and CMB Stage-4. We present observing strategies for telescopes located ... Full text Cite

The Simons Observatory: Instrument overview

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory (SO) will make precision temperature and polarization measurements of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales between 1 arcminute and tens of degrees, contain over 40,000 det ... Full text Cite

CCAT-Prime: Science with an ultra-widefield submillimeter observatory on Cerro Chajnantor

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 We present the detailed science case, and brief descriptions of the telescope design, site, and first light instrument plans for a new ultra-wide field submillimeter observatory, CCAT-prime, that we are constructing at a 5600 m elevation site on Cerro Chaj ... Full text Cite

CCAT-prime: A novel telescope for sub-millimeter astronomy

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The CCAT-prime telescope is a 6-meter aperture, crossed-Dragone telescope, designed for millimeter and sub-millimeter wavelength observations. It will be located at an altitude of 5600 meters, just below the summit of Cerro Chajnantor in the high Atacama r ... Full text Cite

The optical design of the six-meter CCAT-prime and Simons Observatory telescopes

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 A common optical design for a coma-corrected, 6-meter aperture, crossed-Dragone telescope has been adopted for the CCAT-prime telescope of CCAT Observatory, Inc., and for the Large Aperture Telescope of the Simons Observatory. Both are to be built in the h ... Full text Cite

Cold optical design for the large aperture Simons' Observatory telescope

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory will consist of a single large (6 m diameter) telescope and a number of smaller (∼0.5 m diameter) refracting telescopes designed to measure the polarization of the Cosmic Microwave Background to unprecedented accuracy. The large aper ... Full text Cite

Cooldown strategies and transient thermal simulations for the Simons Observatory

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 The Simons Observatory (SO) will provide precision polarimetry of the cosmic microwave background (CMB) using a series of telescopes which will cover angular scales from arc-minutes to tens of degrees, contain over 60,000 detectors, and observe in frequenc ... Full text Cite

Prime-Cam: A first-light instrument for the CCAT-prime telescope

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2018 CCAT-prime will be a 6-meter aperture telescope operating from sub-mm to mm wavelengths, located at 5600 meters elevation on Cerro Chajnantor in the Atacama Desert in Chile. Its novel crossed-Dragone optical design will deliver a high throughput, wide fiel ... Full text Cite

Two-season Atacama Cosmology Telescope polarimeter lensing power spectrum

Journal Article Physical Review D · June 15, 2017 We report a measurement of the power spectrum of cosmic microwave background (CMB) lensing from two seasons of Atacama Cosmology Telescope polarimeter (ACTPol) CMB data. The CMB lensing power spectrum is extracted from both temperature and polarization dat ... Full text Cite

Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

Journal Article Journal of Cosmology and Astroparticle Physics · March 7, 2017 We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pai ... Full text Cite

The First Multichroic Polarimeter Array on the Atacama Cosmology Telescope: Characterization and Performance

Journal Article Journal of Low Temperature Physics · August 1, 2016 The Atacama Cosmology Telescope Polarimeter (ACTPol) is a polarization sensitive receiver for the 6-m Atacama Cosmology Telescope (ACT) and measures the small angular scale polarization anisotropies in the cosmic microwave background (CMB). The full focal ... Full text Cite

Advanced ACTPol Multichroic Polarimeter Array Fabrication Process for 150 mm Wafers

Journal Article Journal of Low Temperature Physics · August 1, 2016 Advanced ACTPol (AdvACT) is a third-generation cosmic microwave background receiver to be deployed in 2016 on the Atacama Cosmology Telescope (ACT). Spanning five frequency bands from 25 to 280 GHz and having just over 5600 transition-edge sensor (TES) bol ... Full text Cite

Advanced ACTPol Cryogenic Detector Arrays and Readout

Journal Article Journal of Low Temperature Physics · August 1, 2016 Advanced ACTPol is a polarization-sensitive upgrade for the 6 m aperture Atacama Cosmology Telescope, adding new frequencies and increasing sensitivity over the previous ACTPol receiver. In 2016, Advanced ACTPol will begin to map approximately half the sky ... Full text Cite

Design and Deployment of a Multichroic Polarimeter Array on the Atacama Cosmology Telescope

Journal Article Journal of Low Temperature Physics · August 1, 2016 We present the design and the preliminary on-sky performance with respect to beams and passbands of a multichroic polarimeter array covering the 90 and 146 GHz cosmic microwave background bands and its enabling broad-band optical system recently deployed o ... Full text Cite

High-Density Superconducting Cables for Advanced ACTPol

Journal Article Journal of Low Temperature Physics · July 1, 2016 Advanced ACTPol (AdvACT) is an upcoming Atacama Cosmology Telescope (ACT) receiver upgrade, scheduled to deploy in 2016, that will allow measurement of the cosmic microwave background polarization and temperature to the highest precision yet with ACT. The ... Full text Cite

The design and characterization of wideband spline-profiled feedhorns for Advanced ACTPol

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 Advanced ACTPol (AdvACT) is an upgraded camera for the Atacama Cosmology Telescope (ACT) that will measure the cosmic microwave background in temperature and polarization over a wide range of angular scales and five frequency bands from 28-230 GHz. AdvACT ... Full text Cite

Mechanical designs and development of TES bolometer detector arrays for the Advanced ACTPol experiment

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 The next generation Advanced ACTPol (AdvACT) experiment is currently underway and will consist of four Transition Edge Sensor (TES) bolometer arrays, with three operating together, totaling ~ 5800 detectors on the sky. Building on experience gained with th ... Full text Cite

Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale angular resolution. To achieve its science goals, Advan ... Full text Cite

Assembly and integration process of the first high density detector array for the Atacama Cosmology Telescope

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 The Advanced ACTPol (AdvACT) upgrade on the Atacama Cosmology Telescope (ACT) consists of multichroic Transition Edge Sensor (TES) detector arrays to measure the Cosmic Microwave Background (CMB) polarization anisotropies in multiple frequency bands. The f ... Full text Cite

Optical modeling and polarization calibration for CMB measurements with ACTPol and Advanced ACTPol

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 The Atacama Cosmology Telescope Polarimeter (ACTPol) is a polarization sensitive upgrade to the Atacama Cosmology Telescope, located at an elevation of 5190 m on Cerro Toco in Chile. ACTPol uses transition edge sensor bolometers coupled to orthomode transd ... Full text Cite

Survey strategy optimization for the Atacama Cosmology Telescope

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2016 In recent years there have been significant improvements in the sensitivity and the angular resolution of the instruments dedicated to the observation of the Cosmic Microwave Background (CMB). ACTPol is the first polarization receiver for the Atacama Cosmo ... Full text Cite

A miniature cryogenic scanning Fabry-Perot interferometer for mid-IR to submm astronomical observations

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2014 We have designed and evaluated a Miniature Cryogenic Scanning Fabry-Perot (MCSF) interferometer which can be inserted into the optical path of a mid-IR camera to observe fine structure lines in the 25-40 μm wavelength regime. The MCSF uses free standing me ... Full text Cite