Discovery of az= 6.1 Radio‐Loud Quasar in the NOAO Deep Wide Field Survey

2006/07/18 by Ian D. McGreer, Robert H. Becker, R. H. Becker +4 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Luminosity #OVV quasar #Physics #Population #Quasar #Redshift #Sky #Spectroscopy #Telescope #astro-ph

paper · pdf · doi:10.1086/507767

published as Astrophys.J.652:157-162,2006 · 18 pages, 6 figures, accepted for ApJ

arxiv created 2006/07/18 · openalex publication_date 2006/11/16 · arxiv updated 2011/02/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

From examination of only 4 deg 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 FLAMINGOS Extragalactic Survey (FLAMEX) IR survey to Faint Images of the Radio Sky at Twenty cm (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 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.

Citations

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Cited by

• AN EXPLORATORY SEARCH FORz≳ 6 QUASARS IN THE UKIDSS EARLY DATA RELEASE