Six More Quasars at Redshift 6 Discovered by the Canada-France High-z Quasar Survey

We present imaging and spectroscopic observations for six quasars at z >= 5.9 discovered by the Canada-France High-z Quasar Survey (CFHQS). The CFHQS contains subsurveys with a range of flux and area combinations to sample a wide range of quasar luminosities at z ~ 6. The new quasars have luminos...

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Bibliographic Details
Published in:The Astronomical journal 2009, Vol.137
Main Authors: Willott, Chris J., Delorme, Philippe, Reylé, Céline, Albert, Loic, Bergeron, Jacqueline, Crampton, David, Delfosse, Xavier, Forveille, Thierry, Hutchings, John B., Mclure, Ross J., Omont, Alain, Schade, David
Format: Article
Language:English
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Summary:We present imaging and spectroscopic observations for six quasars at z >= 5.9 discovered by the Canada-France High-z Quasar Survey (CFHQS). The CFHQS contains subsurveys with a range of flux and area combinations to sample a wide range of quasar luminosities at z ~ 6. The new quasars have luminosities 10-75 times lower than the most luminous Sloan Digital Sky Survey quasars at this redshift. The least luminous quasar, CFHQS J0216-0455 at z = 6.01, has absolute magnitude M 1450 = -22.21, well below the likely break in the luminosity function. This quasar is not detected in a deep XMM-Newton survey showing that optical selection is still a very efficient tool for finding high-redshift quasars.
ISSN:0004-6256
1538-3881
DOI:10.1088/0004-6256/137/3/3541