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Weak Lensing Discovery and Tomography of a Cluster at z=0.68 | | D. Wittman
; V.E. Margoniner
; J.A. Tyson
; J.G. Cohen
; I.P. Dell’Antonio
; A.C. Becker
; | | Date: |
4 Oct 2002 | | Journal: | Astrophys.J. 597 (2003) 218-224 | | Subject: | astro-ph | | Affiliation: | Bell Laboratories, Lucent Technologies), J.G. Cohen (Caltech), I.P. Dell’Antonio (Brown University), A.C. Becker (Bell Laboratories, Lucent Technologies | | Abstract: | We report the weak lensing discovery, spectroscopic confirmation, and weak lensing tomography of a massive cluster of galaxies at $z=0.68$, demonstrating that shear selection of clusters works at redshifts high enough to be cosmologically interesting. The mass estimate from weak lensing, $11.1 +- 2.8 x 10^{14} (r/Mpc)$ solar masses within projected radius r, agrees with that derived from the spectroscopy ($sigma_v = 980 km s^{-1}$), and with the position of an arc which is likely to be a strongly lensed background galaxy. The redshift estimate from weak lensing tomography is consistent with the spectroscopy, demonstrating the feasibility of baryon-unbiased mass surveys. This tomographic technique will be able to roughly identify the redshifts of any dark clusters which may appear in shear-selected samples, up to z ~ 1. | | Source: | arXiv, astro-ph/0210120 | | Services: | Forum | Review | PDF | Favorites | |
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