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