A5063846159- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Particle physics theoretical and experimental studies
- Superconducting and THz Device Technology
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Pulsars and Gravitational Waves Research
- Advanced Differential Geometry Research
- Meteorological Phenomena and Simulations
- Statistical and numerical algorithms
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Medical Imaging Techniques and Applications
- Advanced Vision and Imaging
- Black Holes and Theoretical Physics
- Regional Economic and Spatial Analysis
University of Chicago
2022-2025
Netherlands Institute for Radio Astronomy
2024-2025
Kavli Institute for Particle Astrophysics and Cosmology
2018-2024
Stanford University
2018-2024
Campbell Collaboration
2023
Argonne National Laboratory
2023
National Center for Supercomputing Applications
2023
The University of Melbourne
2023
University of California, Berkeley
2023
McGill University
2012-2019
This work and its companion paper, Amon et al. (2021), present cosmic shear measurements cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain lensing amplitude parameter $S_8\equiv\sigma_8\sqrt{\Omega_\textrm{m}/0.3}$ at 3% level $\Lambda$CDM: $S_8=0.759^{+0.025}_{-0.023}$ (68% CL). Our constraint is 2% when using angular scale cuts that are optimized for $\Lambda$CDM analysis: $S_8=0.772^{+0.018}_{-0.017}$ With alone, we...
We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power cosmic microwave background using data collected by SPT-3G, latest instrument installed on South Pole Telescope. This analysis uses observations a $1500\text{ }\text{ }{\mathrm{deg}}^{2}$ region at 95, 150, 220 GHz taken over four-month period in 2018. report binned values $EE$ $TE$ spectra angular multipole range $300\ensuremath{\le}\ensuremath{\ell}<3000$, multifrequency...
We present a sample-variance-limited measurement of the temperature power spectrum ($TT$) cosmic microwave background using observations $\ensuremath{\sim}1500\text{ }\text{ }{\mathrm{deg}}^{2}$ field made by SPT-3G in 2018. report multifrequency measurements at 95, 150, and 220 GHz covering angular multipole range $750\ensuremath{\le}\ensuremath{\ell}<3000$. combine this $TT$ with published polarization from 2018 observing season update their associated covariance matrix to complete...
We present the methodology for and detail implementation of Dark Energy Survey (DES) 3x2pt DES Year 1 (Y1) analysis, which combines configuration-space two-point statistics from three different cosmological probes: cosmic shear, galaxy-galaxy lensing, galaxy clustering, using data first year observations. have developed two independent modeling pipelines describe code validation process. derive expressions analytical real-space multi-probe covariances, their with numerical simulations....
We measure the cross-correlation between galaxy density in Dark Energy Survey (DES) Science Verification data and lensing of cosmic microwave background (CMB) as reconstructed with Planck satellite South Pole Telescope (SPT). When using DES main sample over full redshift range 0.2 < zphot 1.2, a signal is detected at 6σ 4σ SPT , respectively. then divide galaxies into five photometric bins, finding significant (>2σ) detections all bins. Comparing to fiducial cosmology, we find evolution...
We detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2σ by combining cluster catalogue derived from first year data Dark Energy Survey cosmic microwave background temperature maps South Pole Telescope Survey. This measurement is performed differential statistic that isolates pairwise kSZ signal, providing detection large-scale, motion clusters using redshifts photometric data. By fitting signal to theoretical template, we measure average central...
Abstract We present a measurement of the cosmic microwave background lensing potential using 500 deg 2 150 GHz data from SPTpol receiver on South Pole Telescope. The is reconstructed with signal-to-noise per mode greater than unity at multipoles L ≲ 250, quadratic estimator combination temperature and polarization maps. report measurements power spectrum in multipole range 100 < 2000 sets temperature-only ( T ), polarization-only (POL), minimum-variance (MV) estimators. measure amplitude...
Abstract We present cosmological constraints based on the cosmic microwave background (CMB) lensing potential power spectrum measurement from recent 500 deg 2 SPTpol survey, most precise CMB ground to date. fit a flat ΛCDM model reconstructed alone and in addition with other data sets: baryon acoustic oscillations (BAO), as well primary spectra Planck . The band powers are good agreement when analyzed combination full-sky data. With weak priors density parameters, provide 4% constraint...
ABSTRACT We describe and test the fiducial covariance matrix model for combined two-point function analysis of Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety new ansatzes modelling testing, we validate assumptions approximations this model. These include assumption Gaussian likelihood, trispectrum contribution to covariance, impact evaluating at wrong set parameters, masking survey geometry, deviations from Poissonian shot noise, galaxy weighting schemes, other sub-dominant...
SPT-3G is the third survey receiver operating on South Pole Telescope dedicated to high-resolution observations of cosmic microwave background (CMB). Sensitive measurements temperature and polarization anisotropies CMB provide a powerful dataset for constraining cosmology. Additionally, surveys with arcminute-scale resolution are capable detecting galaxy clusters, millimeter-wave bright galaxies, variety transient phenomena. The instrument provides significant improvement in mapping speed...
We constrain cosmological and galaxy-bias parameters using the combination of galaxy clustering galaxy-galaxy lensing measurements from Dark Energy Survey Year-3 data. describe our modeling framework, choice scales analyzed, validating their robustness to theoretical uncertainties in small-scale by analyzing simulated Using a linear bias model redMaGiC sample, we obtain constraints on matter density be $\Omega_{\rm m} = 0.325^{+0.033}_{-0.034}$. also implement non-linear probe smaller that...
Abstract We present component-separated maps of the primary cosmic microwave background/kinematic Sunyaev–Zel’dovich (SZ) amplitude and thermal SZ Compton- y parameter, created using data from South Pole Telescope (SPT) Planck satellite. These maps, which cover ∼2500 deg 2 southern sky imaged by SPT-SZ survey, represent a significant improvement over previous such products available in this region virtue their higher angular resolution ( <?CDATA $1\buildrel{\,\prime}\over{.} 25$?> <mml:math...
We present a measurement of gravitational lensing over 1500 deg2 the Southern sky using SPT-3G temperature data at 95 GHz and 150 taken in 2018. The amplitude relative to fiducial Planck 2018 Lambda cold dark matter (ΛCDM) cosmology is found be 1.020±0.060, excluding instrumental astrophysical systematic uncertainties. conduct extensive null tests check robustness measurements, report minimum-variance combined power spectrum angular multipoles 50<L<2000, which we use constrain cosmological...
Cross-correlations of galaxy positions and shears with maps gravitational lensing the cosmic microwave background (CMB) are sensitive to distribution large-scale structure in Universe. Such cross-correlations also expected be immune some systematic effects that complicate correlation measurements internal surveys. We present modeling between measured first three years data from Dark Energy Survey CMB derived a combination 2500 deg2 SPT-SZ survey conducted South Pole Telescope full-sky Planck...
Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and galaxies offers a way to place robust constraints on cosmological astrophysical parameters with reduced sensitivity certain systematic effects affecting individual surveys. We measure angular cross-power spectrum Atacama Cosmology Telescope (ACT) DR4 CMB galaxy measured by Dark Energy Survey (DES) Y3 data. Our baseline analysis uses convergence map derived from ACT-DR4 $\textit{Planck}$ data, where most...
ABSTRACT Next-generation cosmological surveys will observe large portions of the sky, with significant overlap between them. Multi-wavelength observations enable us to analyse same large-scale structure from different angles using a variety tracers and astrophysical effects. The complex interplay these observables calls for model that can accurately coherently describe their collective behaviour, posing challenge only be met through use simulations. In this work, suite simulated...
Abstract We present the detection and characterization of fluctuations in linearly polarized emission from atmosphere above South Pole. These measurements make use data SPT-3G receiver on Pole Telescope three frequency bands centered at 95, 150, 220 GHz. cross-correlation between detectors to produce an unbiased estimate power Stokes I , Q U parameters large angular scales. Our results are consistent with signal being produced by combination Rayleigh scattering thermal radiation ground a...
Abstract The Planck cosmic microwave background temperature data are best fit with a ΛCDM model that mildly contradicts constraints from other cosmological probes. South Pole Telescope (SPT) 2540 <?CDATA ${\deg }^{2}$?> SPT-SZ survey offers measurements on sub-degree angular scales (multipoles $650\leqslant {\ell }\leqslant 2500$?> ) sufficient precision to use as an independent check of the data. Here we build recent joint analysis and in Hou et al. by comparing parameter estimates using...
Abstract We present a cosmic microwave background (CMB) lensing map produced from linear combination of South Pole Telescope (SPT) and Planck temperature data. The 150 GHz data the 2500 deg 2 SPT-SZ survey is combined with 143 in harmonic space to obtain that has broader ℓ coverage less noise than either individual map. Using quadratic estimator technique on this map, we produce gravitational potential projected along line sight. measure auto-spectrum <?CDATA ${C}_{L}^{\phi \phi }$?> ,...
The authors report on a search for cosmic birefringence in region of the southern sky, with South Pole Telescope. They reconstruct map polarization rotation anisotropies and measure angular power spectrum map, finding it to be consistent zero. This non detection is used place constraints strength primordial magnetic fields coupling constant electromagnetic Chern-Simons term.
Abstract We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of gravitational lensing cosmic microwave background (CMB), using 100 deg 2 polarization observations from SPTpol receiver on South Pole Telescope. These data reach noise levels as low 5.8 μ K arcmin in polarization, which are enough that typically used quadratic estimator (QE) technique for analyzing CMB is significantly suboptimal. Conversely, procedure extracts all information at any level....
We use the small scales of Dark Energy Survey (DES) Year-3 cosmic shear measurements, which are excluded from DES cosmological analysis, to constrain baryonic feedback. To model feedback, we adopt a correction and numerical package \texttt{Baccoemu} accelerate evaluation nonlinear matter power spectrum. design our analysis pipeline focus on constraints suppression effects, utilizing implication given by principal component Fisher forecasts. Our constraint effects can then be used better...
ABSTRACT We search for the signature of cosmological shocks in stacked gas pressure profiles galaxy clusters using data from South Pole Telescope (SPT). Specifically, we stack latest Compton-y maps 2500 deg2 SPT-SZ survey on locations identified that same set. The sample contains 516 with mean mass $\langle M_{\rm 200m}\rangle = 10^{14.9} \, {\rm M}_\odot$ and redshift 〈z〉 0.55. analyse parallel a set zoom-in hydrodynamical simulations three hundred project. show two features: (i) deficit at...
Joint analyses of cross-correlations between measurements galaxy positions, lensing, and lensing the cosmic microwave background (CMB) offer powerful constraints on large-scale structure Universe. In a forthcoming analysis, we will present cosmological from analysis such measured using Year 3 data Dark Energy Survey (DES), CMB South Pole Telescope (SPT) Planck. Here two key ingredients this analysis: (1) an improved map in SPT-SZ survey footprint, (2) methodology that be used to extract...