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A luminous quasar at a redshift of z = 7.085

Author

Listed:
  • Daniel J. Mortlock

    (Astrophysics Group, Imperial College London, Blackett Laboratory)

  • Stephen J. Warren

    (Astrophysics Group, Imperial College London, Blackett Laboratory)

  • Bram P. Venemans

    (European Southern Observatory, 2 Karl-Schwarzschild Strasse)

  • Mitesh Patel

    (Astrophysics Group, Imperial College London, Blackett Laboratory)

  • Paul C. Hewett

    (Institute of Astronomy)

  • Richard G. McMahon

    (Institute of Astronomy)

  • Chris Simpson

    (Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf)

  • Tom Theuns

    (Institute for Computational Cosmology, University of Durham
    Universiteit Antwerpen, Campus Groenenborger, Groenenborgerlaan 171)

  • Eduardo A. Gonzáles-Solares

    (Institute of Astronomy)

  • Andy Adamson

    (Joint Astronomy Centre, 660 North A'oho¯ku¯ Place)

  • Simon Dye

    (School of Physics and Astronomy, University of Nottingham, University Park)

  • Nigel C. Hambly

    (Institute for Astronomy, SUPA (Scottish Universities Physics Alliance), University of Edinburgh, Royal Observatory, Blackford Hill)

  • Paul Hirst

    (Gemini Observatory, 670 North A'oho¯ku¯ Place)

  • Mike J. Irwin

    (Institute of Astronomy)

  • Ernst Kuiper

    (Leiden Observatory, Leiden University, PO Box 9513)

  • Andy Lawrence

    (Institute for Astronomy, SUPA (Scottish Universities Physics Alliance), University of Edinburgh, Royal Observatory, Blackford Hill)

  • Huub J. A. Röttgering

    (Leiden Observatory, Leiden University, PO Box 9513)

Abstract

Redshift 'record' for luminous quasar Quasars have historically been identified in optical surveys, which are insensitive to sources at z > 6.5. Infrared deep-sky survey data now make it possible to explore higher redshifts, with the result that a luminous quasar (ULAS J1120+0641) with a redshift z = 7.085, beyond the previous high of z = 6.44, has now been identified. Further observations of this and other distant quasars should reveal the ionization state of the Universe as it was only about 0.75 billion years after the Big Bang.

Suggested Citation

  • Daniel J. Mortlock & Stephen J. Warren & Bram P. Venemans & Mitesh Patel & Paul C. Hewett & Richard G. McMahon & Chris Simpson & Tom Theuns & Eduardo A. Gonzáles-Solares & Andy Adamson & Simon Dye & N, 2011. "A luminous quasar at a redshift of z = 7.085," Nature, Nature, vol. 474(7353), pages 616-619, June.
    • Handle: RePEc:nat:nature:v:474:y:2011:i:7353:d:10.1038_nature10159
    DOI: 10.1038/nature10159
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