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A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars

by onley, Jennifer L D , Gunn, James E , Kim, J Serena , Bahcall, Neta A , Brewington, Howard J , Jiang, Linhua , Diamond-Stanic, Aleksandar M , White, Richard L , Fan, Xiaohui , Knapp, Gillian R , Richards, Gordon T , Vestergaard, Marianne , Brinkmann, J , ukugita, Masataka F , Voges, Wolfgang , eilsen, Eric H N , Lupton, Robert H , Young, Jason E , Jr , Barentine, J C , Nitta, Atsuko , Brandt, W N , Becker, Robert H , Strauss, Michael A , Snedden, Stephanie A , Hennawi, Joseph F , Kleinman, S J , Krzesinski, Jurek , Schneider, Donald P , Long, Dan , Harvanek, Michael

in Absorption / BL Lacertae objects / Digital imaging / Emissions control / Galaxies / Photometry / Quasars / Red shift / Sky surveys (astronomy)

2005

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A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars

in Absorption / BL Lacertae objects / Digital imaging / Emissions control / Galaxies / Photometry / Quasars / Red shift / Sky surveys (astronomy)

2005

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A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars

in Absorption / BL Lacertae objects / Digital imaging / Emissions control / Galaxies / Photometry / Quasars / Red shift / Sky surveys (astronomy)

2005

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Paper

A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars

onley, Jennifer L D,

Gunn, James E,

Kim, J Serena,

Bahcall, Neta A,

Brewington, Howard J,

Jiang, Linhua,

Diamond-Stanic, Aleksandar M,

White, Richard L,

Fan, Xiaohui,

Knapp, Gillian R,

Richards, Gordon T,

Vestergaard, Marianne,

Brinkmann, J,

ukugita, Masataka F,

Voges, Wolfgang,

eilsen, Eric H N,

Lupton, Robert H,

Young, Jason E,

Jr,

Barentine, J C,

Nitta, Atsuko,

Brandt, W N,

Becker, Robert H,

Strauss, Michael A,

Snedden, Stephanie A,

Hennawi, Joseph F,

Kleinman, S J,

Krzesinski, Jurek,

Schneider, Donald P,

Long, Dan,

Harvanek, Michael

2005

Overview

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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Publisher

Cornell University Library, arXiv.org

Subject

Absorption

/ BL Lacertae objects

/ Quasars