A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV

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

doi:10.1086/500296

A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV

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

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Abstract

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.

Original language	English
Article number	131
Journal	Astronomical Journal
Volume	131
Issue number	3
ISSN	0004-6256
DOIs	https://doi.org/10.1086/500296
Publication status	Published - 4 Dec 2005

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Fan, X., Strauss, M. A., Richards, G. T., Hennawi, J. F., Becker, R. H., White, R. L., Diamond-Stanic, A. M., onley, J. L. D., Jiang, L., Kim, J. S., Vestergaard, M., Young, J. E., Gunn, J. E., Lupton, R. H., Knapp, G. R., Schneider, D. P., Brandt, W. N., Bahcall, N. A., Barentine, J. C., ... Voges, W. (2005). A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV. Astronomical Journal, 131(3), [131]. https://doi.org/10.1086/500296

Fan, X, Strauss, MA, Richards, GT, Hennawi, JF, Becker, RH, White, RL, Diamond-Stanic, AM, onley, JLD, Jiang, L, Kim, JS, Vestergaard, M, Young, JE, Gunn, JE, Lupton, RH, Knapp, GR, Schneider, DP, Brandt, WN, Bahcall, NA, Barentine, JC, Brinkmann, J, Brewington, HJ, ukugita, MF, Harvanek, M, Kleinman, SJ, Krzesinski, J, Long, D, Eric H. N eilsen, J, Nitta, A, Snedden, SA & Voges, W 2005, 'A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV', Astronomical Journal, vol. 131, no. 3, 131. https://doi.org/10.1086/500296

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title = "A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV",

abstract = "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.",

keywords = "astro-ph",

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

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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

SN - 0004-6256

VL - 131

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 3

M1 - 131

ER -

A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV

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