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Weak lensing by voids in weak lensing maps

Davies, Christopher T.; Cautun, Marius; Li, Baojiu

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Christopher T. Davies

Marius Cautun


Cosmic voids are an important probe of large-scale structure that can constrain cosmological parameters and test cosmological models. We present a new paradigm for void studies: void detection in weak lensing convergence maps. This approach identifies objects that relate directly to our theoretical understanding of voids as underdensities in the total matter field and presents several advantages compared to the customary method of finding voids in the galaxy distribution. We exemplify this approach by identifying voids using the weak lensing peaks as tracers of the large-scale structure. We find self-similarity in the void abundance across a range of peak signal-to-noise selection thresholds. The voids obtained via this approach give a tangential shear signal up to ∼40 times larger than voids identified in the galaxy distribution.

Journal Article Type Article
Acceptance Date Jul 17, 2018
Online Publication Date Jul 25, 2018
Publication Date Oct 11, 2018
Deposit Date Jul 27, 2018
Publicly Available Date Aug 3, 2018
Journal Monthly Notices of the Royal Astronomical Society: Letters
Electronic ISSN 1745-3933
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 480
Issue 1
Pages L101-L105
Public URL
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Accepted Journal Article (661 Kb)

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Letters © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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