Discovery of a z = 6.1 Radio-Loud Quasar in the NDWFS [electronic resource]
From examination of only 4 deg² 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. O...
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Online Access (via OSTI) |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2006.
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| Subjects: |
| Summary: | From examination of only 4 deg² 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} ≈ -26.9 and a radio-to-optical flux ratio ≈ 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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| Item Description: | Published through SciTech Connect. 07/24/2006. "ucrl-jrnl-223314" Astrophysical Journal, vol. 652, no. 1, November 1, 2006, pp. 157-162 FT. McGreer, I D; Becker, R H; Helfand, D J; White, R L. |
| Physical Description: | PDF-file: 20 pages; size: 0.2 Mbytes. |