TY - JOUR
T1 - Cluster-cluster lensing and the case of Abell 383
AU - Zitrin, Adi
AU - Rephaeli, Yoel
AU - Sadeh, Sharon
AU - Medezinski, Elinor
AU - Umetsu, Keiichi
AU - Sayers, Jack
AU - Nonino, Mario
AU - Morandi, Andrea
AU - Molino, Alberto
AU - Czakon, Nicole
AU - Golwala, Sunil R.
PY - 2012/2
Y1 - 2012/2
N2 - 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 Sunyaev-Zel'dovich effect measurements, and calculate their predicted numbers for Λ cold dark matter (ΛCDM) 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 (<10) to as high as a few dozen, depending mainly on whether lensing triaxiality bias is accounted for, through thec-Mrelation. 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-zstructures are magnified, as seen in deep Subaru observations.
AB - 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 Sunyaev-Zel'dovich effect measurements, and calculate their predicted numbers for Λ cold dark matter (ΛCDM) 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 (<10) to as high as a few dozen, depending mainly on whether lensing triaxiality bias is accounted for, through thec-Mrelation. 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-zstructures are magnified, as seen in deep Subaru observations.
KW - Cosmology: observations
KW - Dark matter
KW - Galaxies: clusters: general
KW - Galaxies: clusters: individual: Abell 383
UR - http://www.scopus.com/inward/record.url?scp=84856230436&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2011.20155.x
DO - 10.1111/j.1365-2966.2011.20155.x
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AN - SCOPUS:84856230436
SN - 0035-8711
VL - 420
SP - 1621
EP - 1629
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -