Discovery of a z = 6.1 Radio-Loud Quasar in the NDWFS

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From examination of only 4 deg{sup 2} of sky in the NOAO Deep Wide-Field Survey (NDWFS) region, we have identified the first radio-loud quasar at a redshift z > 6. The object, FIRST J1427385+331241, was discovered by matching the FLAMEX IR survey to FIRST survey radio sources with NDWFS counterparts. One candidate z > 6 quasar was found, and spectroscopy with the Keck II telescope confirmed its identification, yielding a redshift z = 6.12. The object is a Broad Absorption Line (BAL) quasar with an optical luminosity of M{sub B} {approx} -26.9 and a radio-to-optical flux ratio {approx} 60. Two ... continued below

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McGreer, I D; Becker, R H; Helfand, D J & White, R L July 24, 2006.

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From examination of only 4 deg{sup 2} of sky in the NOAO Deep Wide-Field Survey (NDWFS) region, we have identified the first radio-loud quasar at a redshift z > 6. The object, FIRST J1427385+331241, was discovered by matching the FLAMEX IR survey to FIRST survey radio sources with NDWFS counterparts. One candidate z > 6 quasar was found, and spectroscopy with the Keck II telescope confirmed its identification, yielding a redshift z = 6.12. The object is a Broad Absorption Line (BAL) quasar with an optical luminosity of M{sub B} {approx} -26.9 and a radio-to-optical flux ratio {approx} 60. Two Mg II absorptions systems are present at redshifts of z = 2.18 and z = 2.20. We briefly discuss the implications of this discovery for the high-redshift quasar population.

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PDF-file: 20 pages; size: 0.2 Mbytes

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  • Journal Name: Astrophysical Journal, vol. 652, no. 1, November 1, 2006, pp. 157-162

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  • Report No.: UCRL-JRNL-223314
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 900079
  • Archival Resource Key: ark:/67531/metadc887665

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 24, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 23, 2016, 4:02 p.m.

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McGreer, I D; Becker, R H; Helfand, D J & White, R L. Discovery of a z = 6.1 Radio-Loud Quasar in the NDWFS, article, July 24, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc887665/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.