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A Probable z~7 Galaxy Strongly Lensed by the Rich Cluster Abell 2218: Exploring the Dark Ages | | Jean-Paul Kneib
; Richard S. Ellis
; Michael R. Santos
; Johan Richard
; | | Date: |
12 Feb 2004 | | Journal: | Astrophys.J. 607 (2004) 697-703 | | Subject: | astro-ph | | Affiliation: | OMP/Caltech), Richard S. Ellis (Caltech), Michael R. Santos (Caltech/IoA), Johan Richard (OMP | | Abstract: | We discuss the observational properties of a remarkably faint triply-imaged galaxy revealed in a deep z-band ACS observation of the lensing cluster A2218. A well-constrained mass model for the cluster, which incorporates the outcome of recent Keck spectroscopic campaigns, suggests that the triple system arises via a z>6 source viewed at high magnification (~x25). Optical and IR photometry from HST and Keck confirms the lensing hypothesis and suggests a significant discontinuity occurs in the spectral energy distribution within 9250-9850A. If this break is associated with Gunn-Peterson absorption from neutral hydrogen,6.6 | | Source: | arXiv, astro-ph/0402319 | | Services: | Forum | Review | PDF | Favorites | |
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