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Title: Dark Energy Survey Year 1 Results: The Relationship between Mass and Light Around Cosmic Voids

Abstract

What are the mass and galaxy profiles of cosmic voids? In this paper we use two methods to extract voids in the Dark Energy Survey (DES) Year 1 redMaGiC galaxy sample to address this question. We use either 2D slices in projection, or the 3D distribution of galaxies based on photometric redshifts to identify voids. The tangential shear profiles of background galaxies are related to their excess surface mass density. The signal-to-noise ratio for our lensing measurement ranges between 10.7 and 14.0 for the two void samples. We infer their 3D density profiles and find good agreement with N-body simulations for void radii in the range 15-85 Mpc. Comparison with their galaxy profiles then allows us to test the relation between mass and light. We find very similar shapes for the two profiles, consistent with a linear relationship between mass and light. We validate our analysis with the help of simulated mock catalogues and estimate the impact of photometric redshift uncertainties on the measurement. Our methodology can be used for cosmological applications, including tests of gravity with voids.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1568857
Report Number(s):
arXiv:1909.01386; FERMILAB-PUB-19-374-AE
oai:inspirehep.net:1752605
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Fang, Y., and et al. Dark Energy Survey Year 1 Results: The Relationship between Mass and Light Around Cosmic Voids. United States: N. p., 2019. Web.
Fang, Y., & et al. Dark Energy Survey Year 1 Results: The Relationship between Mass and Light Around Cosmic Voids. United States.
Fang, Y., and et al. Tue . "Dark Energy Survey Year 1 Results: The Relationship between Mass and Light Around Cosmic Voids". United States. https://www.osti.gov/servlets/purl/1568857.
@article{osti_1568857,
title = {Dark Energy Survey Year 1 Results: The Relationship between Mass and Light Around Cosmic Voids},
author = {Fang, Y. and et al.},
abstractNote = {What are the mass and galaxy profiles of cosmic voids? In this paper we use two methods to extract voids in the Dark Energy Survey (DES) Year 1 redMaGiC galaxy sample to address this question. We use either 2D slices in projection, or the 3D distribution of galaxies based on photometric redshifts to identify voids. The tangential shear profiles of background galaxies are related to their excess surface mass density. The signal-to-noise ratio for our lensing measurement ranges between 10.7 and 14.0 for the two void samples. We infer their 3D density profiles and find good agreement with N-body simulations for void radii in the range 15-85 Mpc. Comparison with their galaxy profiles then allows us to test the relation between mass and light. We find very similar shapes for the two profiles, consistent with a linear relationship between mass and light. We validate our analysis with the help of simulated mock catalogues and estimate the impact of photometric redshift uncertainties on the measurement. Our methodology can be used for cosmological applications, including tests of gravity with voids.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}