Eve M Vavagiakis

Journal article Astrophysical Journal · June 10, 2026 We present a multifrequency and multi-instrument methodology to study the physical properties of galaxy clusters and cosmic filaments using cosmic microwave background observations. Our approach enables simultaneous measurement of both the thermal (tSZ) an ... Full text Cite

The Atacama Cosmology Telescope: stellar mass growth in massive galaxy clusters from DR5 over the past 7 billion years

Journal article Monthly Notices of the Royal Astronomical Society · June 1, 2026 We probe the stellar mass growth in a sample of 568 Sunyaev–Zel’dovich (SZ) selected galaxy clusters with masses greater than (Formula presented) and redshifts in the range (Formula presented), drawn from the fifth data release of the Atacama Cosmology Tel ... Full text Cite

Test of the Gravitational Force Law on Cosmological Scales Using the Kinematic Sunyaev-Zeldovich Effect.

Journal article Physical review letters · April 2026 The mean pairwise velocity of massive halos reflects the gravitational force law on cosmic scales. We combine cosmic microwave background intensity maps from the Atacama Cosmology Telescope and a galaxy catalog from the Sloan Digital Sky Survey to estimate ... Full text Cite

The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes

Journal article Journal of Cosmology and Astroparticle Physics · April 1, 2026 We present updated forecasts for the scientific performance of the degree-scale (0.5 deg FWHM at 93 GHz), deep-field survey to be conducted by the Simons Observatory (SO). By 2027, the SO Small Aperture Telescope (SAT) complement will be doubled from three ... Full text Cite

Atacama Cosmology Telescope: A measurement of galaxy cluster temperatures through relativistic corrections to the thermal Sunyaev-Zeldovich effect

Journal article Physical Review D · February 18, 2026 The high electron temperature in galaxy clusters ( >1 ... Full text Cite

CCAT: Magnetic Sensitivity Measurements of Kinetic Inductance Detectors

Journal article IEEE Transactions on Applied Superconductivity · January 1, 2026 The Cerro Chajnantor Atacama Telescope (CCAT) Observatory is a ground-based submillimeter to millimeter experiment located on Cerro Chajnantor in the Atacama Desert, at an altitude of 5600 m. CCAT features the 6-m Fred Young Submillimeter Telescope, which ... Full text Cite

THE ATACAMA COSMOLOGY TELESCOPE: DR6 SUNYAEV-ZEL’DOVICH SELECTED GALAXY CLUSTERS CATALOG

Journal article Open Journal of Astrophysics · January 1, 2026 We present the results of a search for galaxy clusters in the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) microwave sky maps covering 16293 square degrees in three frequency bands, using data obtained over the lifetime of the project (2008–2022) ... Full text Cite

CCAT: Flexible Stripline Circuits for Large-Format Kinetic Inductance Detector (KID) Array Readout

Journal article IEEE Transactions on Applied Superconductivity · January 1, 2026 The CCAT Observatory's primary science instrument, Prime-Cam, is nearing readiness for deployment to the Fred Young Submillimeter Telescope in the Atacama Desert in northern Chile. When fully deployed, Prime-Cam will field approximately 100 000 kinetic ind ... Full text Cite

Detection of the pairwise kinematic Sunyaev-Zel’dovich effect and pairwise velocity with DESI DR1 galaxies and ACT DR6 and Planck CMB data

Journal article Physical Review D · January 1, 2026 We present a 9.3σ detection of the pairwise kinematic Sunyaev-Zel’dovich (kSZ) effect by combining a sample of 913,286 Luminous Red Galaxies (LRGs) from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI DR1) catalog and coadded Atacama Cosmolog ... Full text Cite

Probing cosmic velocities with the pairwise kinematic Sunyaev-Zel’dovich signal in DESI Bright Galaxy Sample DR1 and ACT DR6

Journal article Physical Review D · January 1, 2026 We present a measurement of the pairwise kinematic Sunyaev-Zel’dovich (kSZ) signal using the Dark Energy Spectroscopic Instrument (DESI) Bright Galaxy Sample (BGS) Data Release 1 (DR1) galaxy sample overlapping with the Atacama Cosmology Telescope (ACT) CM ... Full text Cite

The Simons Observatory: Characterization of All DC/RF Routing Wafers for Detector Modules

Journal article IEEE Transactions on Applied Superconductivity · January 1, 2026 The Simons Observatory (SO) is a cosmic microwave background experiment with over 67 000 polarization-sensitive transition-edge sensor (TES) detectors currently installed for use in observations and plans to increase the total detector count to ∼98 000 det ... Full text Cite

CCAT: Optical Responsivity, Noise, and Readout Optimization of KIDs for Prime-Cam

Journal article IEEE Transactions on Applied Superconductivity · January 1, 2026 The Prime-Cam instrument on the Fred Young Submillimeter Telescope (FYST) at the CCAT Observatory will conduct sensitive millimeter to submillimeter surveys for a range of astrophysical and cosmological sciences. Prime-Cam will use kinetic inductance detec ... Full text Cite

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

The Atacama Cosmology Telescope: DR6 power spectra, likelihoods and ΛCDM parameters

Journal article Journal of Cosmology and Astroparticle Physics · November 1, 2025 We present power spectra of the cosmic microwave background (CMB) anisotropy in temperature and polarization, measured from the Data Release 6 maps made from Atacama Cosmology Telescope (ACT) data. These cover 19,000 deg2 of sky in bands centere ... Full text Cite

The Atacama Cosmology Telescope: DR6 maps

Journal article Journal of Cosmology and Astroparticle Physics · November 1, 2025 We present Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) maps of the Cosmic Microwave Background temperature and polarization anisotropy at arcminute resolution over three frequency bands centered on 98, 150 and 220 GHz. The maps are based on data ... Full text Cite

The Atacama Cosmology Telescope: DR6 constraints on extended cosmological models

Journal article Journal of Cosmology and Astroparticle Physics · November 1, 2025 We use new cosmic microwave background (CMB) primary temperature and polarization anisotropy measurements from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) to test foundational assumptions of the standard cosmological model, ΛCDM, and set con ... 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

Measurements of the thermal Sunyaev-Zel’dovich effect with ACT and DESI luminous red galaxies

Journal article Physical Review D · January 1, 2025 Cosmic Microwave Background (CMB) photons scatter off the free-electron gas in galaxies and clusters, allowing us to use the CMB as a backlight to probe the gas in and around low-redshift galaxies. The thermal Sunyaev-Zel’dovich effect, sourced by hot elec ... 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

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

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

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

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

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