Cluster-Cluster Lensing and the Case of Abell 383
Abstract
Extensive surveys of galaxy clusters motivate us to assess the likelihood of cluster-cluster lensing (CCL), namely, gravitational-lensing of a background cluster by a foreground cluster. We briefly describe the characteristics of CCLs in optical, X-ray and SZ measurements, and calculate their predicted numbers for CDM parameters and a viable range of cluster mass functions and their uncertainties. The predicted number of CCLs in the strong-lensing regime varies from several () to as high as a few dozen, depending mainly on whether lensing triaxiality bias is accounted for, through the c-M relation. A much larger number is predicted when taking into account also CCL in the weak-lensing regime. In addition to few previously suggested CCLs, we report a detection of a possible CCL in A383, where background candidate high- structures are magnified, as seen in deep Subaru observations.
Keywords
Cite
@article{arxiv.1108.4929,
title = {Cluster-Cluster Lensing and the Case of Abell 383},
author = {Adi Zitrin and Yoel Rephaeli and Sharon Sadeh and Elinor Medezinski and Keiichi Umetsu and Jack Sayers and Mario Nonino and Andrea Morandi and Alberto Molino and Nicole Czakon and Sunil R. Golwala},
journal= {arXiv preprint arXiv:1108.4929},
year = {2013}
}
Comments
9 pages, 5 figures, submitted to MNRAS