The Canada-France High-z Quasar Survey: Nine New Quasars and the Luminosity Function at Redshift 6

Chris J. Willott, Philippe Delorme, Céline Reylé, Loic Albert, Jacqueline Bergeron, David Crampton, Xavier Delfosse, Thierry Forveille, John B. Hutchings, Ross J. McLure, Alain Omont, David Schade

Research output: Contribution to journalArticlepeer-review

Abstract

We present discovery imaging and spectroscopy for nine new z ~ 6 quasars found in the Canada-France High-z Quasar Survey (CFHQS) bringing the total number of CFHQS quasars to 19. By combining the CFHQS with the more luminous Sloan Digital Sky Survey sample, we are able to derive the quasar luminosity function from a sample of 40 quasars at redshifts 5.74 <z <6.42. Our binned luminosity function shows a slightly lower normalization and flatter slope than found in previous work. The binned data also suggest a break in the luminosity function at M 1450 ≈ -25. A double power-law maximum likelihood fit to the data is consistent with the binned results. The luminosity function is strongly constrained (1σ uncertainty
Original languageEnglish
Pages (from-to)906-918
JournalAstronomical Journal
Volume139
DOIs
Publication statusPublished - 1 Mar 2010

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