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The Astronomical Journal Volume 137 Number 3 Create an alert RSS this journal

Chris J. Willott et al. 2009 The Astronomical Journal 137 3541 doi:10.1088/0004-6256/137/3/3541

SIX MORE QUASARS AT REDSHIFT 6 DISCOVERED BY THE CANADA-FRANCE HIGH-z QUASAR SURVEY

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Chris J. Willott1, Philippe Delorme2, Céline Reylé3, Loic Albert4, Jacqueline Bergeron5, David Crampton1, Xavier Delfosse2, Thierry Forveille2, John B. Hutchings1, Ross J. McLure6, Alain Omont5 and David Schade1

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Abstract References Cited By

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.


Keywords

cosmology: observations; quasars: emission lines; quasars: general


Dates

Issue 3 (2009 March)

Received 2008 September 12, accepted for publication 2008 December 26

Published 2009 February 17



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