Journal article
A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars
The Astronomical journal, v 131(3), pp 1203-1209
04 Dec 2005
Abstract
Astron.J.131:1203-1209,2006 We present the discovery of seven quasars at z>5.7, selected from ~2000 deg^2
of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new
quasars have redshifts z from 5.79 to 6.13. Five are selected as part of a
complete flux-limited sample in the SDSS Northern Galactic Cap; two have larger
photometric errors and are not part of the complete sample. One of the new
quasars, SDSS J1335+3533 (z=5.93), exhibits no emission lines; the 3-sigma
limit on the rest-frame equivalent width of Ly alpha+NV line is 5 A. It is the
highest redshift lineless quasar known, and could be a gravitational lensed
galaxy, a BL Lac object or a new type of quasar. Two new z>6 quasars, SDSS
1250+3130 (z=6.13) and SDSS J1137+3549 (z=6.01), show deep Gunn-Peterson
absorption gaps in Ly alpha. These gaps are narrower the complete Gunn-Peterson
absorption troughs observed among quasars at z>6.2 and do not have complete Ly
beta absorption.
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Details
- Title
- A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars
- Creators
- Xiaohui FanMichael A StraussGordon T RichardsJoseph F HennawiRobert H BeckerRichard L WhiteAleksandar M Diamond-StanicJennifer L. D onleyLinhua JiangJ. Serena KimMarianne VestergaardJason E YoungJames E GunnRobert H LuptonGillian R KnappDonald P SchneiderW. N BrandtNeta A BahcallJ. C BarentineJ BrinkmannHoward J BrewingtonMasataka F ukugitaMichael HarvanekS. J KleinmanJurek KrzesinskiDan LongEric H. N eilsen,JrAtsuko NittaStephanie A SneddenWolfgang Voges
- Publication Details
- The Astronomical journal, v 131(3), pp 1203-1209
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000236143700001
- Scopus ID
- 2-s2.0-33645214956
- Other Identifier
- 991014878441704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics