A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV. / Fan, Xiaohui; Strauss, Michael A.; Richards, Gordon T.; Hennawi, Joseph F.; Becker, Robert H.; White, Richard L.; Diamond-Stanic, Aleksandar M.; onley, Jennifer L. D; Jiang, Linhua; Kim, J. Serena; Vestergaard, Marianne; Young, Jason E.; Gunn, James E.; Lupton, Robert H.; Knapp, Gillian R.; Schneider, Donald P.; Brandt, W. N.; Bahcall, Neta A.; Barentine, J. C.; Brinkmann, J.; Brewington, Howard J.; ukugita, Masataka F; Harvanek, Michael; Kleinman, S. J.; Krzesinski, Jurek; Long, Dan; Eric H. N eilsen, Jr; Nitta, Atsuko; Snedden, Stephanie A.; Voges, Wolfgang.
I: Astronomical Journal, Bind 131, Nr. 3, 131, 04.12.2005.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV
AU - Fan, Xiaohui
AU - Strauss, Michael A.
AU - Richards, Gordon T.
AU - Hennawi, Joseph F.
AU - Becker, Robert H.
AU - White, Richard L.
AU - Diamond-Stanic, Aleksandar M.
AU - onley, Jennifer L. D
AU - Jiang, Linhua
AU - Kim, J. Serena
AU - Vestergaard, Marianne
AU - Young, Jason E.
AU - Gunn, James E.
AU - Lupton, Robert H.
AU - Knapp, Gillian R.
AU - Schneider, Donald P.
AU - Brandt, W. N.
AU - Bahcall, Neta A.
AU - Barentine, J. C.
AU - Brinkmann, J.
AU - Brewington, Howard J.
AU - ukugita, Masataka F
AU - Harvanek, Michael
AU - Kleinman, S. J.
AU - Krzesinski, Jurek
AU - Long, Dan
AU - Eric H. N eilsen, Jr
AU - Nitta, Atsuko
AU - Snedden, Stephanie A.
AU - Voges, Wolfgang
PY - 2005/12/4
Y1 - 2005/12/4
N2 - 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.
AB - 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.
KW - astro-ph
U2 - 10.1086/500296
DO - 10.1086/500296
M3 - Journal article
VL - 131
JO - The Astronomical Journal
JF - The Astronomical Journal
SN - 0004-6256
IS - 3
M1 - 131
ER -
ID: 123371892