Scholars@Duke
Michael A. Troxel

Michael A. Troxel

Associate Professor of Physics
Physics
michael.troxel@duke.edu
Box 90305, Durham, NC 27708
Phy 265, Durham, NC 27712

Selected Publications

SPT clusters with des and HST weak lensing. I. Cluster lensing and Bayesian population modeling of multiwavelength cluster datasets

Journal Article Physical Review D · October 15, 2024 We present a Bayesian population modeling method to analyze the abundance of galaxy clusters identified by the South Pole Telescope (SPT) with a simultaneous mass calibration using weak gravitational lensing data from the Dark Energy Survey (DES) and the H ... Full text Cite

SPT clusters with des and HST weak lensing. II. Cosmological constraints from the abundance of massive halos

Journal Article Physical Review D · October 15, 2024 We present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (SZ) effect in South Pole Telescope (SPT) data with a simultaneous mass calibration using weak gravitational lensing data from the Dark En ... Full text Cite

Weak lensing combined with the kinetic Sunyaev–Zel’dovich effect: a study of baryonic feedback

Journal Article Monthly Notices of the Royal Astronomical Society · October 1, 2024 Extracting precise cosmology from weak lensing surveys requires modelling the non-linear matter power spectrum, which is suppressed at small scales due to baryonic feedback processes. However, hydrodynamical galaxy formation simulations make widely varying ... Full text Cite

Dark Energy Survey: A 2.1% measurement of the angular baryonic acoustic oscillation scale at redshift zeff=0.85 from the final dataset

Journal Article Physical Review D · September 15, 2024 We present the angular diameter distance measurement obtained with the baryonic acoustic oscillation (BAO) feature from galaxy clustering in the completed Dark Energy Survey, consisting of six years (Y6) of observations. We use the Y6 BAO galaxy sample, op ... Full text Cite

The Dark Energy Survey: Cosmology Results with ∼1500 New High-redshift Type Ia Supernovae Using the Full 5 yr Data Set

Journal Article Astrophysical Journal Letters · September 1, 2024 We present cosmological constraints from the sample of Type Ia supernovae (SNe Ia) discovered and measured during the full 5 yr of the Dark Energy Survey (DES) SN program. In contrast to most previous cosmological samples, in which SNe are classified based ... Full text Cite

The SRG/eROSITA All-Sky Survey Dark Energy Survey year 3 weak gravitational lensing by eRASS1 selected galaxy clusters

Journal Article Astronomy and Astrophysics · July 1, 2024 Context. Number counts of galaxy clusters across redshift are a powerful cosmological probe if a precise and accurate reconstruction of the underlying mass distribution is performed – a challenge called mass calibration. With the advent of wide and deep ph ... Full text Cite

Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. Validation on simulations

Journal Article Physical Review D · March 15, 2024 Beyond-two-point statistics contain additional information on cosmological as well as astrophysical and observational (systematics) parameters. In this methodology paper we provide an end-to-end simulation-based analysis of a set of Gaussian and non-Gaussi ... Full text Cite

Simulating image coaddition with the Nancy Grace Roman Space Telescope - II. Analysis of the simulated images and implications for weak lensing

Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2024 One challenge for applying current weak lensing analysis tools to the Nancy Grace Roman Space Telescope is that individual images will be undersampled. Our companion paper presented an initial application of IMCOM - an algorithm that builds an optimal mapp ... Full text Cite

Cosmology from cross-correlation of ACT-DR4 CMB lensing and DES-Y3 cosmic shear

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2024 Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and weak lensing of galaxies offers a way to place robust constraints on cosmological and astrophysical parameters with reduced sensitivity to certain systematic effects affect ... Full text Cite

Simulating image coaddition with the Nancy Grace Roman Space Telescope – I. Simulation methodology and general results

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2024 The upcoming Nancy Grace Roman Space Telescope will carry out a wide-area survey in the near-infrared. A key science objective is the measurement of cosmic structure via weak gravitational lensing. Roman data will be undersampled, which introduces new chal ... Full text Cite

Detection of the significant impact of source clustering on higher order statistics with DES Year 3 weak gravitational lensing data

Journal Article Monthly Notices of the Royal Astronomical Society: Letters · January 1, 2024 We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that this effect can ... Full text Cite

Dark Energy Survey Year 3 results: redshift calibration of the MagLim lens sample from the combination of SOMPZ and clustering and its impact on cosmology

Journal Article Monthly Notices of the Royal Astronomical Society · January 1, 2024 We present an alternative calibration of the MagLim lens sample redshift distributions from the Dark Energy Survey (DES) first 3 yr of data (Y3). The new calibration is based on a combination of a self-organizing-map-based scheme and clustering redshifts t ... Full text Cite

Cosmological shocks around galaxy clusters: a coherent investigation with DES, SPT, and ACT

Journal Article Monthly Notices of the Royal Astronomical Society · January 1, 2024 We search for signatures of cosmological shocks in gas pressure profiles of galaxy clusters using the cluster catalogues from three surveys: the Dark Energy Survey (DES) Year 3, the South Pole Telescope (SPT) SZ survey, and the Atacama Cosmology Telescope ... Full text Cite

Beyond the 3rd moment: a practical study of using lensing convergence CDFs for cosmology with DES Y3

Journal Article Monthly Notices of the Royal Astronomical Society · December 1, 2023 Widefield surveys probe clustered scalar fields – such as galaxy counts, lensing potential, etc. – which are sensitive to different cosmological and astrophysical processes. Constraining such processes depends on the statistics that summarize the field. We ... Full text Cite

The Dark Energy Survey Year 3 high-redshift sample: Selection, characterization, and analysis of galaxy clustering

Journal Article Monthly Notices of the Royal Astronomical Society · November 1, 2023 The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of their galaxy clustering ... Full text Cite

The intrinsic alignment of red galaxies in DES Y1 redMaPPer galaxy clusters

Journal Article Monthly Notices of the Royal Astronomical Society · November 1, 2023 Clusters of galaxies trace the most non-linear peaks in the cosmic density field. The weak gravitational lensing of background galaxies by clusters can allow us to infer their masses. However, galaxies associated with the local environment of the cluster c ... Full text Cite

The Dark Energy Survey Year 3 and eBOSS: constraining galaxy intrinsic alignments across luminosity and colour space

Journal Article Monthly Notices of the Royal Astronomical Society · September 1, 2023 We present direct constraints on galaxy intrinsic alignments (IAs) using the Dark Energy Survey Year 3 (DES Y3), the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and its precursor, the Baryon Oscillation Spectroscopic Survey (BOSS). Our measur ... Full text Cite

A synthetic Roman Space Telescope High-Latitude Time-Domain Survey: supernovae in the deep field

Journal Article Monthly Notices of the Royal Astronomical Society · August 1, 2023 NASA will launch the Nancy Grace Roman Space Telescope (hereafter Roman) in the second half of this decade, which will allow for a generation-defining measurement of dark energy through multiple probes, including Type Ia supernovae (SNe Ia). To improve dec ... Full text Cite

Dark Energy Survey Year 3 results: magnification modelling and impact on cosmological constraints from galaxy clustering and galaxy-galaxy lensing

Journal Article Monthly Notices of the Royal Astronomical Society · August 1, 2023 We study the effect of magnification in the Dark Energy Survey Year 3 analysis of galaxy clustering and galaxy-galaxy lensing, using two different lens samples: a sample of luminous red galaxies, redMaGiC, and a sample with a redshift-dependent magnitude l ... Full text Cite

A joint Roman Space Telescope and Rubin Observatory synthetic wide-field imaging survey

Journal Article Monthly Notices of the Royal Astronomical Society · June 1, 2023 We present and validate 20 deg2 of overlapping synthetic imaging surveys representing the full depth of the Nancy Grace Roman Space Telescope High-Latitude Imaging Survey (HLIS) and 5 yr of observations of the Vera C. Rubin Observatory Legacy Survey of Spa ... Full text Cite

Non-local contribution from small scales in galaxy–galaxy lensing: comparison of mitigation schemes

Journal Article Monthly Notices of the Royal Astronomical Society · June 1, 2023 Recent cosmological analyses with large-scale structure and weak lensing measurements, usually referred to as 3 × 2pt, had to discard a lot of signal to noise from small scales due to our inability to accurately model non-linearities and baryonic effects. ... Full text Cite

Mapping gas around massive galaxies: cross-correlation of DES Y3 galaxies and Compton-y maps from SPT and Planck

Journal Article Monthly Notices of the Royal Astronomical Society · June 1, 2023 We cross-correlate positions of galaxies measured in data from the first three years of the Dark Energy Survey with Compton-y maps generated using data from the South Pole Telescope (SPT) and the Planck mission. We model this cross-correlation measurement ... Full text Cite

Dark Energy Survey Year 3 results: Constraints on extensions to ΛcDM with weak lensing and galaxy clustering

Journal Article Physical Review D · April 15, 2023 We constrain six possible extensions to the Λ cold dark matter (CDM) model using measurements from the Dark Energy Survey's first three years of observations, alone and in combination with external cosmological probes. The DES data are the two-point correl ... Full text Cite

A unified catalogue-level reanalysis of stage-III cosmic shear surveys

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2023 Cosmological parameter constraints from recent galaxy imaging surveys are reaching percent-level accuracy on the effective amplitude of the lensing signal, S8. The upcoming Legacy Survey of Space and Time (LSST) of the Vera C. Rubin Observatory will produc ... Full text Cite

Weak gravitational lensing shear estimation with metacalibration for the Roman High-Latitude Imaging Survey

Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2023 We investigate the performance of the metacalibration shear calibration framework using simulated imaging data for the Nancy Grace Roman Space Telescope (Roman) reference High-Latitude Imaging Survey (HLIS). The weak lensing programme of Roman requires the ... Full text Cite

Mapping variations of redshift distributions with probability integral transforms

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2023 We present a method for mapping variations between probability distribution functions and apply this method within the context of measuring galaxy redshift distributions from imaging survey data. This method, which we name PITPZ for the probability integra ... Full text Cite

Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurements

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2023 We use the small scales of the Dark Energy Survey (DES) Year-3 cosmic shear measurements, which are excluded from the DES Year-3 cosmological analysis, to constrain the baryonic feedback. To model the baryonic feedback, we adopt a baryonic correction model ... Full text Cite

Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. I. Construction of CMB lensing maps and modeling choices

Journal Article Physical Review D · January 15, 2023 Joint analyses of cross-correlations between measurements of galaxy positions, galaxy lensing, and lensing of the cosmic microwave background (CMB) offer powerful constraints on the large-scale structure of the Universe. In a forthcoming analysis, we will ... Full text Cite

Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. III. Combined cosmological constraints

Journal Article Physical Review D · January 15, 2023 We present cosmological constraints from the analysis of two-point correlation functions between galaxy positions and galaxy lensing measured in Dark Energy Survey (DES) Year 3 data and measurements of cosmic microwave background (CMB) lensing from the Sou ... Full text Cite

Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. II. Cross-correlation measurements and cosmological constraints

Journal Article Physical Review D · January 15, 2023 Cross-correlations of galaxy positions and galaxy shears with maps of gravitational lensing of the cosmic microwave background (CMB) are sensitive to the distribution of large-scale structure in the Universe. Such cross-correlations are also expected to be ... Full text Cite

Consistent lensing and clustering in a low-S8Universe with BOSS, des Year 3, HSC Year 1, and KiDS-1000

Journal Article Monthly Notices of the Royal Astronomical Society · January 1, 2023 We evaluate the consistency between lensing and clustering based on measurements from Baryon Oscillation Spectroscopic Survey combined with galaxy-galaxy lensing from Dark Energy Survey (DES) Year 3, Hyper Suprime-Cam Subaru Strategic Program (HSC) Year 1, ... Full text Cite

DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

Journal Article Open Journal of Astrophysics · January 1, 2023 We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 wh ... Full text Cite

Dark Energy Survey Year 3 results: Cosmological constraints from galaxy clustering and galaxy-galaxy lensing using the MagLim lens sample

Journal Article Physical Review D · November 15, 2022 The cosmological information extracted from photometric surveys is most robust when multiple probes of the large scale structure of the Universe are used. Two of the most sensitive probes are the clustering of galaxies and the tangential shear of backgroun ... Full text Cite

Cosmic shear in harmonic space from the Dark Energy Survey Year 1 Data: Compatibility with configuration space results

Journal Article Monthly Notices of the Royal Astronomical Society · November 1, 2022 We perform a cosmic shear analysis in harmonic space using the first year of data collected by the Dark Energy Survey (DES-Y1). We measure the cosmic weak lensing shear power spectra using the metacalibration catalogue and perform a likelihood analysis wit ... Full text Cite

Dark energy survey year 3 results: Cosmological constraints from the analysis of cosmic shear in harmonic space

Journal Article Monthly Notices of the Royal Astronomical Society · September 1, 2022 We present cosmological constraints from the analysis of angular power spectra of cosmic shear maps based on data from the first three years of observations by the Dark Energy Survey (DES Y3). Our measurements are based on the pseudo-Cℓ method and compleme ... Full text Cite

The DECam Local Volume Exploration Survey Data Release 2

Journal Article Astrophysical Journal, Supplement Series · August 1, 2022 We present the second public data release (DR2) from the DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new DECam observations with archival DECam data from the Dark Energy Survey, the DECam Legacy Survey, and other DECam community progr ... Full text Cite

Dark Energy Survey Year 3 results: Calibration of lens sample redshift distributions using clustering redshifts with BOSS/eBOSS

Journal Article Monthly Notices of the Royal Astronomical Society · July 1, 2022 We present clustering redshift measurements for Dark Energy Survey (DES) lens sample galaxies used in weak gravitational lensing and galaxy clustering studies. To perform these measurements, we cross-correlate with spectroscopic galaxies from the Baryon Ac ... Full text Cite

Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and Planck thermal Sunyaev-Zel'dovich effect observations. I. Measurements, systematics tests, and feedback model constraints

Journal Article Physical Review D · June 15, 2022 We present a tomographic measurement of the cross-correlation between thermal Sunyaev-Zel'dovich (TSZ) maps from Planck and the Atacama Cosmology Telescope and weak galaxy lensing shears measured during the first three years of observations of the Dark Ene ... Full text Cite

Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and Planck thermal Sunyaev-Zel'dovich effect observations. II. Modeling and constraints on halo pressure profiles

Journal Article Physical Review D · June 15, 2022 Hot, ionized gas leaves an imprint on the cosmic microwave background via the thermal Sunyaev-Zel'dovich (tSZ) effect. The cross-correlation of gravitational lensing (which traces the projected mass) with the tSZ effect (which traces the projected gas pres ... Full text Cite

Dark Energy Survey Year 3 Results: Three-point shear correlations and mass aperture moments

Journal Article Physical Review D · May 15, 2022 We present high signal-to-noise measurements of three-point shear correlations and the third moment of the mass aperture statistic using the first 3 years of data from the Dark Energy Survey. We additionally obtain the first measurements of the configurati ... Full text Cite

Impact of image persistence in the Roman Space Telescope High-Latitude Survey

Journal Article Monthly Notices of the Royal Astronomical Society · May 1, 2022 The High-Latitude Survey of the Nancy Grace Roman Space Telescope is expected to measure the positions and shapes of hundreds of millions of galaxies in an area of 2220 deg2. This survey will provide high-quality weak lensing data with unprecedented system ... Full text Cite

Dark energy survey year 3 results: Cosmology with peaks using an emulator approach

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2022 We constrain the matter density ωm and the amplitude of density fluctuations σ8 within the ΛCDM cosmological model with shear peak statistics and angular convergence power spectra using mass maps constructed from the first three years of data of the Dark E ... Full text Cite

Dark Energy Survey Year 3 results: Marginalization over redshift distribution uncertainties using ranking of discrete realizations

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2022 Cosmological information from weak lensing surveys is maximized by sorting source galaxies into tomographic redshift subsamples. Any uncertainties on these redshift distributions must be correctly propagated into the cosmological results. We present hyperr ... Full text Cite

Lensing without borders - I. A blind comparison of the amplitude of galaxy-galaxy lensing between independent imaging surveys

Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2022 Lensing without borders is a cross-survey collaboration created to assess the consistency of galaxy-galaxy lensing signals (Δς) across different data sets and to carry out end-to-end tests of systematic errors. We perform a blind comparison of the amplitud ... Full text Cite

The des view of the Eridanus supervoid and the CMB cold spot

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2022 The Cold Spot is a puzzling large-scale feature in the Cosmic Microwave Background temperature maps and its origin has been subject to active debate. As an important foreground structure at low redshift, the Eridanus supervoid was recently detected, but it ... Full text Cite

Dark Energy Survey Year 3 results: Cosmological constraints from galaxy clustering and weak lensing

Journal Article Physical Review D · January 15, 2022 We present the first cosmology results from large-scale structure using the full 5000 deg2 of imaging data from the Dark Energy Survey (DES) Data Release 1. We perform an analysis of large-scale structure combining three two-point correlation functions (3× ... Full text Cite

Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to data calibration

Journal Article Physical Review D · January 15, 2022 This work, together with its companion paper, Secco, Samuroff et al. [Phys. Rev. D 105, 023515 (2022)PRVDAQ2470-001010.1103/PhysRevD.105.023515], present the Dark Energy Survey Year 3 cosmic-shear measurements and cosmological constraints based on an analy ... Full text Cite

Dark Energy Survey Year 3 Results: Measuring the Survey Transfer Function with Balrog

Journal Article Astrophysical Journal, Supplement Series · January 1, 2022 We describe an updated calibration and diagnostic framework, Balrog, used to directly sample the selection and photometric biases of the Dark Energy Survey (DES) Year 3 (Y3) data set. We systematically inject onto the single-epoch images of a random 20% su ... Full text Cite

Cosmology with the Roman Space Telescope – multiprobe strategies

Journal Article Monthly Notices of the Royal Astronomical Society · August 27, 2021 ABSTRACTWe simulate the scientific performance of the Nancy Grace Roman Space Telescope High Latitude Survey (HLS) on dark energy and modified gravity. The 1.6-yr HLS Reference survey is currently envisioned ... Full text Open Access Cite

The Dark Energy Survey Data Release 2

Journal Article \apjs · August 2021 Full text Cite

Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology

Journal Article The Astrophysical Journal Supplement Series · June 1, 2021 AbstractWe describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmologic analyses, and provide usage notes aimed at th ... Full text Cite

DES Y1 results: Splitting growth and geometry to test

Journal Article Physical Review D · January 21, 2021 Full text Cite

The impact of spectroscopic incompleteness in direct calibration of redshift distributions for weak lensing surveys

Journal Article Monthly Notices of the Royal Astronomical Society · August 21, 2020 ABSTRACTObtaining accurate distributions of galaxy redshifts is a critical aspect of weak lensing cosmology experiments. One of the methods used to estimate and validate redshift distributions is to apply we ... Full text Cite

VizieR Online Data Catalog: The first 3yrs of DES-SN (DES-SN3YR) (Brout+, 2019)

Journal Article VizieR Online Data Catalog · August 2020 Cite

Beyond linear galaxy alignments

Journal Article \prd · November 2019 Full text Cite

Blinding multi-probe cosmological experiments

Journal Article arXiv e-prints · November 2019 Cite

Producing a BOSS CMASS sample with DES imaging

Journal Article \mnras · October 2019 Full text Cite

On the need for synthetic data and robust data simulators in the 2020s

Journal Article Bulletin of the American Astronomical Society · September 2019 Cite

Dark Matter Science in the Era of LSST

Journal Article \baas · May 2019 Cite

The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s

Journal Article arXiv e-prints · February 2019 Cite

A unified analysis of four cosmic shear surveys

Journal Article \mnras · January 2019 Full text Cite

The Dark Energy Survey: Data Release 1

Journal Article \apjs · December 2018 Full text Cite

Cosmology with the WFIRST High Latitude Survey

Conference APS April Meeting Abstracts · January 2018 Cite

Cosmological Constraints from Galaxy Clustering and Weak Lensing

Conference American Astronomical Society Meeting Abstracts #231 · January 2018 Cite

Effect of Self-Calibration of Intrinsic Alignment on the Cosmological Parameter Constraints for LSST

Conference American Astronomical Society Meeting Abstracts #229 · January 2017 Cite

Weak lensing in the Dark Energy Survey

Conference APS April Meeting Abstracts · March 2016 Cite

Gravitational lensing as a tool for cosmology: Sources of bias and techniques for achieving its full potential

Conference American Astronomical Society Meeting Abstracts #223 · January 2014 Cite

Self-Calibration Techniques for 3-point Intrinsic Alignment Correlations in Weak Gravitational Lensing Surveys

Conference American Astronomical Society Meeting Abstracts #221 · January 2013 Cite

Self-Calibration Technique for 3-point Intrinsic Alignment Correlations in Weak Lensing Surveys

Conference American Astronomical Society Meeting Abstracts #219 · January 2012 Cite

Probing the Nature of Type I Supernovae with SYNOW

Conference The Multicolored Landscape of Compact Objects and Their Explosive Origins · August 2007 Full text Cite

Direct Analysis of Spectra of the Unusual Type Ib Supernova 2005bf

Conference American Astronomical Society Meeting Abstracts · December 2006 Cite

Integration of Near-Maximum-Light Type Ia Supernova Spectra as a Method of High-z Identification

Conference American Astronomical Society Meeting Abstracts · December 2005 Cite

Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light

Conference American Astronomical Society Meeting Abstracts · December 2005 Cite