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19912026
Showing 2021 · astro-ph.COShow all

28 papers · 2 filters

astro-ph.CO2021★ 8 cited

Type Ia Supernova Magnitude Step from the local Dark Matter Environment

Heinrich Steigerwald, Davi Rodrigues, Stefano Profumo +1

Residuals in the Hubble diagram at optical wavelengths and host galaxy stellar mass are observed to correlate in Type Ia supernovae (SNe Ia) (`magnitude step'). Among possible prog…

astro-ph.CO2021★ 5 cited

HeII Ly Transmission Spikes and Absorption Troughs in Eight High-resolution Spectra Probing the End of HeII Reionization

Kirill Makan, Gábor Worseck, Frederick B. Davies +3

We present statistics of HeII Lya transmission spikes and large-scale absorption troughs using archival high-resolution (-) far-UV spectra of eight HeI…

astro-ph.CO2021★ 2.3k cited

A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team

Adam G. Riess, Wenlong Yuan, Lucas M. Macri +15

We report observations from HST of Cepheids in the hosts of 42 SNe Ia used to calibrate the Hubble constant (H0). These include all suitable SNe Ia in the last 40 years at z<0.01,…

astro-ph.CO2021★ 958 cited

The Pantheon+ Analysis: The Full Dataset and Light-Curve Release

Dan Scolnic, Dillon Brout, Anthony Carr +27

Here we present 1701 light curves of 1550 spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological parameters as part of the Pantheon+ SN ana…

astro-ph.CO2021★ 1 cited

Lensing Without Borders. I. A Blind Comparison of the Amplitude of Galaxy-Galaxy Lensing Between Independent Imaging Surveys

A. Leauthaud, A. Amon, S. Singh +104

Lensing Without Borders is a cross-survey collaboration created to assess the consistency of galaxy-galaxy lensing signals () across different data-sets and to carry out end-to…

astro-ph.CO2021★ 39 cited

Inferring the Thermal History of the Intergalactic Medium from the Properties of the Hydrogen and Helium Lyman-alpha Forest

Bruno Villasenor, Brant Robertson, Piero Madau +1

The filamentary network of intergalactic medium (IGM) gas that gives origin to the Lyman-alpha forest in the spectra of distant quasars encodes information on the physics of struct…

astro-ph.CO2021★ 226 cited

Galaxy Formation and Reionization: Key Unknowns and Expected Breakthroughs by the James Webb Space Telescope

Brant E. Robertson

The scheduled launch of James Webb Space Telescope (JWST) in late 2021 marks a new start for studies of galaxy formation at high redshift z>~6 during the era of Cosmic Reionization…

astro-ph.CO2021★ 108 cited

The Pantheon+ Analysis: Evaluating Peculiar Velocity Corrections in Cosmological Analyses with Nearby Type Ia Supernovae

Erik R. Peterson, W. D'Arcy Kenworthy, Daniel Scolnic +10

Separating the components of redshift due to expansion and peculiar motion in the nearby universe () is critical for using Type Ia Supernovae (SNe Ia) to measure the Hubble…

astro-ph.CO2021★ 15 cited

The DES Bright Arcs Survey: Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey 5,000 Sq. Deg. Footprint

J. H. O'Donnell, R. D. Wilkinson, H. T. Diehl +79

We report the combined results of eight searches for strong gravitational lens systems in the full 5,000 sq. deg. of Dark Energy Survey (DES) observations. The observations accumul…

astro-ph.CO2021

A Novel Framework for Modeling Weakly Lensing Shear Using Kinematics and Imaging at Moderate Redshift

Brian DiGiorgio, Kevin Bundy, Kyle B. Westfall +2

Kinematic weak lensing describes the distortion of a galaxy's projected velocity field due to lensing shear, an effect recently reported for the first time by Gurri et al. based on…

astro-ph.CO2021★ 6 cited

Cluster Assembly Times as a Cosmological Test

Yuba Amoura, Nicole E. Drakos, Anael Berrouet +1

The abundance of galaxy clusters in the low-redshift universe provides an important cosmological test, constraining a product of the initial amplitude of fluctuations and the amoun…

astro-ph.CO2021★ 36 cited

Second Data Release of the COSMOS Lyman-alpha Mapping and Tomographic Observation: The First 3D Maps of the Detailed Cosmic Web at 2.05<z<2.55

Benjamin Horowitz, Khee-Gan Lee, Metin Ata +12

We present the second data release of the COSMOS Lyman-Alpha Mapping And Tomography Observations (CLAMATO) Survey conducted with the LRIS spectrograph on the Keck-I telescope. This…

astro-ph.CO2021★ 50 cited

Constraining the Cosmic Baryon Distribution with Fast Radio Burst Foreground Mapping

Khee-Gan Lee, Metin Ata, Ilya S. Khrykin +5

The dispersion measures (DM) of fast radio bursts (FRBs) encode the integrated electron density along the line-of-sight, which is typically dominated by the intergalactic medium (I…

astro-ph.CO2021★ 2 cited

Estimating the contribution of foreground halos to the FRB 180924 dispersion measure

Sunil Simha, Nicolas Tejos, J. Xavier Prochaska +6

Fast Radio Burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribut…

astro-ph.CO2021★ 33 cited

Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly IGM transmission properties and environment of bright galaxies during the Epoch of Reionization

Yuxiang Qin, J. Stuart B. Wyithe, Pascal A. Oesch +4

The highly neutral inter-galactic medium (IGM) during the Epoch of Reionization (EoR) is expected to suppress Ly emission with damping-wing absorption, causing nearly no Ly d…

astro-ph.CO2021★ 43 cited

Cross-correlation of DES Y3 lensing and ACT/ thermal Sunyaev Zel'dovich Effect II: Modeling and constraints on halo pressure profiles

S. Pandey, M. Gatti, E. Baxter +121

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…

astro-ph.CO2021★ 29 cited

Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers

Nir Mandelker, Frank C. van den Bosch, Volker Springel +5

Using a novel suite of cosmological simulations zooming in on a Mpc-scale intergalactic sheet or "pancake" at z~3-5, we conduct an in-depth study of the thermal properties and HI c…

astro-ph.CO2021★ 16 cited

Velocity Dispersions of Clusters in the Dark Energy Survey Y3 redMaPPer Catalog

V. Wetzell, T. E. Jeltema, B. Hegland +96

We measure the velocity dispersions of clusters of galaxies selected by the redMaPPer algorithm in the first three years of data from the Dark Energy Survey (DES), allowing us to p…

astro-ph.CO2021★ 7 cited

Beyond Mass: Detecting Secondary Halo Properties with Galaxy-Galaxy Lensing

Enia Xhakaj, Alexie Leauthaud, Johannes Lange +3

Secondary halo properties beyond mass, such as the mass accretion rate (MAR), concentration, and the half mass scale, are essential in understanding the formation of large-scale st…

astro-ph.CO2021★ 3 cited

Optimal observing strategies for velocity-suppressed dark matter annihilation

Nolan Smyth, Gabriela Huckabee, Stefano Profumo

Numerous particle models for the cosmological dark matter feature a pair-annihilation rate that scales with powers of the relative velocity between the annihilating particles. As a…

astro-ph.CO2021★ 1.2k cited

Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing

DES Collaboration, T. M. C. Abbott, M. Aguena +168

We present the first cosmology results from large-scale structure in the Dark Energy Survey (DES) spanning 5000 deg. We perform an analysis combining three two-point correlatio…

astro-ph.CO2021★ 398 cited

Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty

L. F. Secco, S. Samuroff, E. Krause +151

This work and its companion paper, Amon et al. (2021), present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark Energy Surve…

astro-ph.CO2021★ 14 cited

Discovering new forces with gravitational waves from supermassive black holes

Jeff A. Dror, Benjamin V. Lehmann, Hiren H. Patel +1

Supermassive black hole binary mergers generate a stochastic gravitational wave background detectable by pulsar timing arrays. While the amplitude of this background is subject to…

astro-ph.CO2021★ 150 cited

SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances

W. D. Kenworthy, D. O. Jones, M. Dai +13

A spectral-energy distribution (SED) model for Type Ia supernovae (SNe Ia) is a critical tool for measuring precise and accurate distances across a large redshift range and constra…