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Discovery of a Color-Selected Quasar at z=5.50 | | Daniel Stern
; Hyron Spinrad
; Peter Eisenhardt
; Andrew J. Bunker
; Steve Dawson
; S. A. Stanford
; Richard Elston
; | | Date: |
17 Feb 2000 | | Journal: | Astrophys.J. 533 (2000) L75-L78 | | Subject: | astro-ph | | Affiliation: | 4 and 5), and Richard Elston ( JPL/Caltech, UC-Berkeley, IoA, Cambridge, UC-Davis, IGPP/LLNL, and Florida | | Abstract: | We present observations of RD J030117+002025, a quasar at z=5.50 discovered from deep, multi-color, ground-based observations covering 74 square arcmin. This is the most distant quasar or AGN currently known. The object was targeted as an R-band dropout, with R(AB)>26.3 (3-sigma limit in a 3 arcsec diameter region), I(AB)=23.8, and z(AB)=23.4. The Keck/LRIS spectrum shows broad Lyman-alpha/NV emission and sharp absorption decrements from the highly-redshifted hydrogen forests. The fractional continuum depression due to the Lyman-alpha forest is D(A)=0.90. RD J030117+002025 is the least luminous, high-redshift quasar known (M(B)~-22.7). | | Source: | arXiv, astro-ph/0002338 | | Services: | Forum | Review | PDF | Favorites | |
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