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

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 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_B ~ -26.9 and a radio-to-optical flux ratio ~ 60. Two MgII 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.

18 pages, 6 figures, accepted for ApJ

References in corpus (6)

• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars
• A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release
• Average Extinction Curves and Relative Abundances for QSO Absorption Line Systems at 1 <= z_abs < 2
• The Discovery of Three New z>5 Quasars in the AGN and Galaxy Evolution Survey
• Investigating lensing by absorbers in the 2dF-Quasar survey
• On the radio properties of the highest redshift quasars

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