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Weak gravitational lensing by dark clusters

Weinberg, Nevin N. and Kamionkowski, Marc (2002) Weak gravitational lensing by dark clusters. Monthly Notices of the Royal Astronomical Society, 337 (4). pp. 1269-1281. ISSN 0035-8711.

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We calculate the abundance of dark matter concentrations that are sufficiently overdense to produce a detectable weak-gravitational-lensing signal. Most of these overdensities are virialized haloes containing identifiable X-ray and/or optical clusters. However, a significant fraction are non-virialized, cluster-mass overdensities still in the process of gravitational collapse — these should produce significantly weaker or no X-ray emission. Our predicted abundance of such dark clusters is consistent with the abundance implied by the detection by Erben et al. of an apparent dark lens. Weak lensing by these non-virialized objects will need to be considered when determining cosmological parameters with the lens abundance in future weak-lensing surveys. Such weak lenses should also help shed light on the process of cluster formation.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Weinberg, Nevin N.0000-0001-9194-2084
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2002 RAS. Received: 07 August 2002. Accepted: 13 August 2002. Published: 21 December 2002. We thank R. Ellis for useful comments and an anonymous referee for very constructive suggestions and comments that have improved the presentation of this paper. NNW acknowledges the support of an NSF Graduate Fellowship. This work was supported in part by NSF AST-0096023, NASA NAG5-8506, and DoE DE-FG03-92-ER40701.
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:gravitational lensing – galaxies: clusters: general – cosmology: theory.
Issue or Number:4
Record Number:CaltechAUTHORS:20200527-135433015
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Official Citation:Nevin N. Weinberg, Marc Kamionkowski, Weak gravitational lensing by dark clusters, Monthly Notices of the Royal Astronomical Society, Volume 337, Issue 4, December 2002, Pages 1269–1281,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103501
Deposited By: Rebecca Minjarez
Deposited On:01 Jun 2020 15:11
Last Modified:01 Jun 2020 15:11

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