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

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

doi:10.1088/0004-6256/137/3/3541

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

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

School of Physics and Astronomy

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Abstract

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.

Original language	English
Pages (from-to)	3541-3547
Journal	Astronomical Journal
Volume	137
DOIs	https://doi.org/10.1088/0004-6256/137/3/3541
Publication status	Published - 1 Mar 2009

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10.1088/0004-6256/137/3/3541

http://adsabs.harvard.edu/abs/2009AJ....137.3541W

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

abstract = "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.",

author = "Willott, {Chris J.} and Philippe Delorme and C{\'e}line Reyl{\'e} and Loic Albert and Jacqueline Bergeron and David Crampton and Xavier Delfosse and Thierry Forveille and Hutchings, {John B.} and McLure, {Ross J.} and Alain Omont and David Schade",

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doi = "10.1088/0004-6256/137/3/3541",

language = "English",

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pages = "3541--3547",

journal = "Astronomical Journal",

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TY - JOUR

T1 - Six More Quasars at Redshift 6 Discovered by the Canada-France High-z Quasar Survey

AU - Willott, Chris J.

AU - Delorme, Philippe

AU - Reylé, Céline

AU - Albert, Loic

AU - Bergeron, Jacqueline

AU - Crampton, David

AU - Delfosse, Xavier

AU - Forveille, Thierry

AU - Hutchings, John B.

AU - McLure, Ross J.

AU - Omont, Alain

AU - Schade, David

PY - 2009/3/1

Y1 - 2009/3/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=66249137128&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/137/3/3541

DO - 10.1088/0004-6256/137/3/3541

M3 - Article

VL - 137

SP - 3541

EP - 3547

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

ER -

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

Abstract

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