output
19912026
Showing 2020 · astro-ph.COShow all

26 papers · 2 filters

astro-ph.CO2020★ 1 cited

Probing Systematic Bias in Low-Redshift Type Ia Supernova Measurements by Cross Analyzing Surface Brightness and Hubble Residuals

H. Solak, R. Kessler, D. O. Jones

For low-redshift (z < 0.1) Type Ia supernovae (SN Ia) samples used in several cosmological analyses over the past decade, we probe for systematic bias by looking for correlations b…

astro-ph.CO2020★ 8 cited

Understanding Type Ia Supernova Distance Biases by Simulating Spectral Variations

J. D. R. Pierel, D. O. Jones, M. Dai +7

In the next decade, transient searches from the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope will increase the sample of known Type Ia Supernovae (SN Ia) fro…

astro-ph.CO2020★ 70 cited

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

S. Everett, B. Yanny, N. Kuropatkin +97

We describe an updated calibration and diagnostic framework, Balrog, used to directly sample the selection and photometric biases of the Dark Energy Survey's (DES) Year 3 (Y3) data…

astro-ph.CO2020★ 25 cited

New Evidence for Extended HeII Reionization at z>3.5 from HeII Lyman Alpha and Beta Transmission Spikes

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

We present new high-resolution (R~14,000) spectra of the two brightest HeII-transparent quasars in the far-UV (FUV) at z>3.5, HE2QSJ2311-1417 (z=3.70) and HE2QSJ1630+0435 (z=3.81),…

astro-ph.CO2020★ 139 cited

An observational determination of the evolving extragalactic background light from the multiwavelength HST/CANDELS survey in the Fermi and CTA era

Alberto Saldana-Lopez, Alberto Domínguez, Pablo G. Pérez-González +5

The diffuse extragalactic background light (EBL) is formed by ultraviolet (UV), optical, and infrared (IR) photons mainly produced by star formation processes over the history of t…

astro-ph.CO2020★ 10 cited

Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes

Tim Schrabback, Henk Hoekstra, Ludovic Van Waerbeke +19

Cosmological simulations predict that galaxies are embedded into triaxial dark matter haloes, which appear approximately elliptical in projection. Weak gravitational lensing allows…

astro-ph.CO2020★ 37 cited

Spectroscopic Quantification of Projection Effects in the SDSS redMaPPer Galaxy Cluster Catalogue

J. Myles, D. Gruen, A. B. Mantz +12

Projection effects, whereby galaxies along the line-of-sight to a galaxy cluster are mistakenly associated with the cluster halo, present a significant challenge for optical cluste…

astro-ph.CO2020★ 36 cited

Dark Energy Survey internal consistency tests of the joint cosmological probes analysis with posterior predictive distributions

C. Doux, E. Baxter, P. Lemos +85

Beyond-CDM physics or systematic errors may cause subsets of a cosmological data set to appear inconsistent when analyzed assuming CDM. We present an application of internal…

astro-ph.CO2020★ 40 cited

On the halo-mass and radial scale dependence of the lensing is low effect

Johannes U. Lange, Alexie Leauthaud, Sukhdeep Singh +4

The canonical CDM cosmological model makes precise predictions for the clustering and lensing properties of galaxies. It has been shown that the lensing amplitude of galaxies in…

astro-ph.CO2020★ 12 cited

The Third Data Release of the KODIAQ Survey

John M. O'Meara, Nicolas Lehner, J. Christopher Howk +1

We present and make publicly available the third data release (DR3) of the Keck Observatory Database of Ionized Absorption toward Quasars (KODIAQ) survey. KODIAQ DR3 consists of a…

astro-ph.CO2020★ 146 cited

Direct Detection of Hawking Radiation from Asteroid-Mass Primordial Black Holes

Adam Coogan, Logan Morrison, Stefano Profumo

Light, asteroid-mass primordial black holes, with lifetimes in the range between hundreds to several millions times the age of the universe, are well-motivated candidates for the c…

astro-ph.CO2020★ 21 cited

Effects of Photoionization and Photoheating on Lyman-alpha Forest Properties from Cholla Cosmological Simulations

Bruno Villasenor, Brant Robertson, Piero Madau +1

The density and temperature properties of the intergalactic medium (IGM) reflect the heating and ionization history during cosmological structure formation, and are primarily probe…

astro-ph.CO2020★ 22 cited

The XMM Cluster Survey: new evidence for the 3.5 keV feature in clusters is inconsistent with a dark matter origin

S. Bhargava, P. A. Giles, A. K. Romer +14

There have been several reports of a detection of an unexplained excess of X-ray emission at 3.5 keV in astrophysical systems. One interpretation of this excess is the dec…

astro-ph.CO2020★ 50 cited

Dark Energy Survey Year 1 Results: Constraining Baryonic Physics in the Universe

Hung-Jin Huang, Tim Eifler, Rachel Mandelbaum +74

Measurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the f…

astro-ph.CO2020★ 9 cited

Model-independent discovery prospects for primordial black holes at LIGO

Benjamin V. Lehmann, Stefano Profumo, Jackson Yant

Primordial black holes may encode the conditions of the early universe, and may even constitute a significant fraction of cosmological dark matter. Their existence has yet to be es…

astro-ph.CO2020★ 9 cited

The impact of Lyman- emission line heating and cooling on the cosmic dawn 21-cm signal

Avery Meiksin, Piero Madau

Allowing for enhanced Ly photon line emission from Population III dominated stellar systems in the first forming galaxies, we show the 21-cm cosmic dawn signal at may…

astro-ph.CO2020★ 79 cited

Clustering and Halo Abundances in Early Dark Energy Cosmological Models

Anatoly Klypin, Vivian Poulin, Francisco Prada +7

LCDM cosmological models with Early Dark Energy (EDE) have been proposed to resolve tensions between the Hubble constant H0 = 100h km/s/Mpc measured locally, giving h ~ 0.73, and H…

astro-ph.CO2020★ 618 cited

A census of baryons in the Universe from localized fast radio bursts

J. -P. Macquart, J. X. Prochaska, M. McQuinn +13

More than three quarters of the baryonic content of the Universe resides in a highly diffuse state that is difficult to observe, with only a small fraction directly observed in gal…

astro-ph.CO2020★ 7 cited

Effective Opacity of the Intergalactic Medium from Galaxy Spectra Analysis

Jose S. Monzon, J. Xavier Prochaska, Khee-Gan Lee +1

We measure the effective opacity () of the Intergalactic Medium (IGM) from the composite spectra of 281 Lyman-Break Galaxies (LBGs) in the redshift range $2 \lesssim z \le…

astro-ph.CO2020★ 26 cited

The first Hubble diagram and cosmological constraints using superluminous supernova

C. Inserra, M. Sullivan, C. R. Angus +88

We present the first Hubble diagram of superluminous supernovae (SLSNe) out to a redshift of two, together with constraints on the matter density, , and the dark energy…

astro-ph.CO2020★ 17 cited

Validation of Selection Function, Sample Contamination and Mass Calibration in Galaxy Cluster Samples

S. Grandis, M. Klein, J. J. Mohr +70

We construct and validate the selection function of the MARD-Y3 sample. This sample was selected through optical follow-up of the 2nd ROSAT faint source catalog (2RXS) with Dark En…

astro-ph.CO2020★ 279 cited

Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing

DES Collaboration, Tim Abbott, Michel Aguena +129

We perform a joint analysis of the counts and weak lensing signal of redMaPPer clusters selected from the Dark Energy Survey (DES) Year 1 dataset. Our analysis uses the same shear…

astro-ph.CO2020★ 32 cited

First Constraints on Compact Dark Matter from Fast Radio Burst Microstructure

Mawson W. Sammons, Jean-Pierre Macquart, Ron D. Ekers +5

Despite existing constraints, it remains possible that up to of all dark matter is comprised of compact objects, such as the black holes in the 10-100\,M range whose…

astro-ph.CO2020★ 37 cited

Evidence for Cosmic Acceleration is Robust to Observed Correlations Between Type Ia Supernova Luminosity and Stellar Age

B. M. Rose, D. Rubin, A. Cikota +6

Type Ia Supernovae (SNe Ia) are powerful standardizable candles for constraining cosmological models and provided the first evidence of the accelerated expansion of the universe. T…