TY - JOUR
T1 - First measurement of gravitational lensing by cosmic voids in SDSS
AU - Melchior, Peter
AU - Sutter, P. M.
AU - Sheldon, Erin S.
AU - Krause, Elisabeth
AU - Wandelt, Benjamin D.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2014/6
Y1 - 2014/6
N2 - We report the first measurement of the diminutive lensing signal arising from matter underdensities associated with cosmic voids. While undetectable individually, by stacking the weak gravitational shear estimates around 901 voids detected in Sloan Digital Sky Survey DR7 by Sutter et al., we find substantial evidence for a depression of the lensing signal compared to the cosmic mean. This depression is most pronounced at the void radius, in agreement with analytical models of void matter profiles. Even with the largest void sample and imaging survey available today, we cannot put useful constraints on the radial dark matter void profile. We invite independent investigations of our findings by releasing data and analysis code to the public at. https://github.com/pmelchior/void-lensing.
AB - We report the first measurement of the diminutive lensing signal arising from matter underdensities associated with cosmic voids. While undetectable individually, by stacking the weak gravitational shear estimates around 901 voids detected in Sloan Digital Sky Survey DR7 by Sutter et al., we find substantial evidence for a depression of the lensing signal compared to the cosmic mean. This depression is most pronounced at the void radius, in agreement with analytical models of void matter profiles. Even with the largest void sample and imaging survey available today, we cannot put useful constraints on the radial dark matter void profile. We invite independent investigations of our findings by releasing data and analysis code to the public at. https://github.com/pmelchior/void-lensing.
KW - Cosmology: observations
KW - Gravitational lensing: weak
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U2 - 10.1093/mnras/stu456
DO - 10.1093/mnras/stu456
M3 - Article
AN - SCOPUS:84899816156
VL - 440
SP - 2922
EP - 2927
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -