A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars

Xiaohui Fan, Michael A. Strauss, Gordon T. Richards, Joseph F. Hennawi, Robert H. Becker, Richard L. White, Aleksandar M. Diamond-Stanic, Jennifer L. Donley, 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 Fukugita, Michael Harvanek, S. J. Kleinman, Jurek Krzesinski, Dan Long, Eric H. Neilsen, Atsuko Nitta, Stephanie A. Snedden, Wolfgang Voges

Research output: Contribution to journalArticle

283 Citations (Scopus)

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. 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 σ limit on the rest-frame equivalent width of the Lyα+N v line is 5 Å. 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 Lyα. These gaps are narrower than the complete Gunn-Peterson absorption troughs observed among quasars at z > 6.2 and do not have complete Lyß absorption.

Original languageEnglish (US)
Pages (from-to)1203-1209
Number of pages7
JournalAstronomical Journal
Volume131
Issue number3
DOIs
StatePublished - Mar 2006

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Keywords

  • Quasars: absorption lines
  • Quasars: emission lines
  • Quasars: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Fan, X., Strauss, M. A., Richards, G. T., Hennawi, J. F., Becker, R. H., White, R. L., ... Voges, W. (2006). A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars. Astronomical Journal, 131(3), 1203-1209. https://doi.org/10.1086/500296

A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars. / Fan, Xiaohui; Strauss, Michael A.; Richards, Gordon T.; Hennawi, Joseph F.; Becker, Robert H.; White, Richard L.; Diamond-Stanic, Aleksandar M.; Donley, Jennifer L.; 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.; Fukugita, Masataka; Harvanek, Michael; Kleinman, S. J.; Krzesinski, Jurek; Long, Dan; Neilsen, Eric H.; Nitta, Atsuko; Snedden, Stephanie A.; Voges, Wolfgang.

In: Astronomical Journal, Vol. 131, No. 3, 03.2006, p. 1203-1209.

Research output: Contribution to journalArticle

Fan, X, Strauss, MA, Richards, GT, Hennawi, JF, Becker, RH, White, RL, Diamond-Stanic, AM, Donley, JL, 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, Fukugita, M, Harvanek, M, Kleinman, SJ, Krzesinski, J, Long, D, Neilsen, EH, Nitta, A, Snedden, SA & Voges, W 2006, 'A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars', Astronomical Journal, vol. 131, no. 3, pp. 1203-1209. https://doi.org/10.1086/500296
Fan, Xiaohui ; Strauss, Michael A. ; Richards, Gordon T. ; Hennawi, Joseph F. ; Becker, Robert H. ; White, Richard L. ; Diamond-Stanic, Aleksandar M. ; Donley, Jennifer L. ; 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. ; Fukugita, Masataka ; Harvanek, Michael ; Kleinman, S. J. ; Krzesinski, Jurek ; Long, Dan ; Neilsen, Eric H. ; Nitta, Atsuko ; Snedden, Stephanie A. ; Voges, Wolfgang. / A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars. In: Astronomical Journal. 2006 ; Vol. 131, No. 3. pp. 1203-1209.
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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. 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 σ limit on the rest-frame equivalent width of the Lyα+N v line is 5 {\AA}. 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 Lyα. These gaps are narrower than the complete Gunn-Peterson absorption troughs observed among quasars at z > 6.2 and do not have complete Ly{\ss} absorption.",
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T1 - A survey of z> 5.7 quasars in the sloan digital sky survey. IV. Discovery of seven additional quasars

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 - Donley, Jennifer L.

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 - Fukugita, Masataka

AU - Harvanek, Michael

AU - Kleinman, S. J.

AU - Krzesinski, Jurek

AU - Long, Dan

AU - Neilsen, Eric H.

AU - Nitta, Atsuko

AU - Snedden, Stephanie A.

AU - Voges, Wolfgang

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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. 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 σ limit on the rest-frame equivalent width of the Lyα+N v line is 5 Å. 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 Lyα. These gaps are narrower than the complete Gunn-Peterson absorption troughs observed among quasars at z > 6.2 and do not have complete Lyß absorption.

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KW - Quasars: absorption lines

KW - Quasars: emission lines

KW - Quasars: general

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