First measurement of gravitational lensing by cosmic voids in SDSS

Peter Melchior; P. M. Sutter; Erin S. Sheldon; Elisabeth Krause; Benjamin D. Wandelt

doi:10.1093/mnras/stu456

First measurement of gravitational lensing by cosmic voids in SDSS

Peter Melchior, P. M. Sutter, Erin S. Sheldon, Elisabeth Krause, Benjamin D. Wandelt

Research output: Contribution to journal › Article

64 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	2922-2927
Number of pages	6
Journal	Monthly Notices of the Royal Astronomical Society
Volume	440
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stu456
State	Published - Jun 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmology: observations
Gravitational lensing: weak

Access to Document

10.1093/mnras/stu456

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Cite this

Melchior, P., Sutter, P. M., Sheldon, E. S., Krause, E., & Wandelt, B. D. (2014). First measurement of gravitational lensing by cosmic voids in SDSS. Monthly Notices of the Royal Astronomical Society, 440(4), 2922-2927. https://doi.org/10.1093/mnras/stu456

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AU - Melchior, Peter

AU - Sutter, P. M.

AU - Sheldon, Erin S.

AU - Krause, Elisabeth

AU - Wandelt, Benjamin D.

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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.

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