Eddington-limited Accretion and the Black Hole Mass Function at Redshift 6
Chris J. Willott,Loic Albert,Doris Arzoumanian,Jacqueline Bergeron,David Crampton,Philippe Delorme,J. B. Hutchings,Alain Omont,Céline Reylé,David Schade +9 more
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In this paper, a quasar in the Canada-France High-z Quasar Survey (CFHQS) at redshift z = 6.44 was found to have a strong correlation between Mg II FWHM and UV luminosity and that most quasars at this early epoch are accreting close to the Eddington limit.Abstract:
We present discovery observations of a quasar in the Canada-France High-z Quasar Survey (CFHQS) at redshift z = 6.44. We also use near-infrared spectroscopy of nine CFHQS quasars at z ~ 6 to determine black hole masses. These are compared with similar estimates for more luminous Sloan Digital Sky Survey quasars to investigate the relationship between black hole mass and quasar luminosity. We find a strong correlation between Mg II FWHM and UV luminosity and that most quasars at this early epoch are accreting close to the Eddington limit. Thus, these quasars appear to be in an early stage of their life cycle where they are building up their black hole mass exponentially. Combining these results with the quasar luminosity function, we derive the black hole mass function at z = 6. Our black hole mass function is ~104 times lower than at z = 0 and substantially below estimates from previous studies. The main uncertainties which could increase the black hole mass function are a larger population of obscured quasars at high redshift than is observed at low redshift and/or a low quasar duty cycle at z = 6. In comparison, the global stellar mass function is only ~102 times lower at z = 6 than at z = 0. The difference between the black hole and stellar mass function evolution is due to either rapid early star formation which is not limited by radiation pressure as is the case for black hole growth or inefficient black hole seeding. Our work predicts that the black hole mass-stellar mass relation for a volume-limited sample of galaxies declines rapidly at very high redshift. This is in contrast to the observed increase at 4 < z < 6 from the local relation if one just studies the most massive black holes.read more
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A luminous quasar at a redshift of z = 7.085
Daniel J. Mortlock,Stephen J. Warren,Bram Venemans,Mitesh Patel,Paul C. Hewett,Richard G. McMahon,Chris Simpson,Tom Theuns,Tom Theuns,E. Gonzales-Solares,Andy Adamson,Simon Dye,Nigel Hambly,Paul Hirst,Mike Irwin,Ernst Kuiper,Andy Lawrence,Huub Röttgering +17 more
TL;DR: Observations of a quasar at a redshift of 7.3 are reported, suggesting that the neutral fraction of the intergalactic medium in front of ULAS J1120+0641 exceeded 0.1.
Journal ArticleDOI
The Low-luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
Misty C. Bentz,Kelly D. Denney,Catherine J. Grier,Aaron J. Barth,Bradley M. Peterson,Marianne Vestergaard,Marianne Vestergaard,Vardha N. Bennert,Gabriela Canalizo,Gisella De Rosa,Alexei V. Filippenko,Elinor L. Gates,Jenny E. Greene,Weidong Li,Matthew A. Malkan,Richard W. Pogge,Daniel Stern,Tommaso Treu,Jong-Hak Woo +18 more
TL;DR: In this article, the authors present an updated and revised analysis of the relationship between the H{beta} broadline region (BLR) radius and the luminosity of the active galactic nucleus (AGN).
Journal ArticleDOI
An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
Xue-Bing Wu,Feige Wang,Xiaohui Fan,Weimin Yi,Wenwen Zuo,Fuyan Bian,Linhua Jiang,Ian D. McGreer,Ran Wang,Jinyi Yang,Qian Yang,David Thompson,Yuri Beletsky +12 more
TL;DR: The discovery of an ultraluminous quasar, SDSS J010013.02+280225.8, at redshift z = 6.30, which has an optical and near-infrared luminosity a few times greater than those of previously known z > 6 quasars.
Journal ArticleDOI
STAR FORMATION AND GAS KINEMATICS OF QUASAR HOST GALAXIES AT z ∼ 6: NEW INSIGHTS FROM ALMA
Ran Wang,Ran Wang,Jeff Wagg,Chris Carilli,Fabian Walter,Lindley Lentati,Xiaohui Fan,Dominik A. Riechers,Frank Bertoldi,Desika Narayanan,Michael A. Strauss,Pierre Cox,Alain Omont,Karl M. Menten,Kirsten Kraiberg Knudsen,Roberto Neri,Linhua Jiang +16 more
TL;DR: In this paper, the Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C Pi] 158 mu m fine structure line and dust continuum emission from the host galaxies of five redshift 6 quasars were carried out in the extended array at 0'' 7 resolution.
References
More filters
Book
Numerical Recipes in C: The Art of Scientific Computing
TL;DR: Numerical Recipes: The Art of Scientific Computing as discussed by the authors is a complete text and reference book on scientific computing with over 100 new routines (now well over 300 in all), plus upgraded versions of many of the original routines, with many new topics presented at the same accessible level.
Journal ArticleDOI
Five-year wilkinson microwave anisotropy probe observations: cosmological interpretation
Eiichiro Komatsu,Jo Dunkley,Jo Dunkley,M. R. Nolta,Charles L. Bennett,B. Gold,Gary Hinshaw,N. Jarosik,Davin Larson,Michele Limon,Lyman A. Page,David N. Spergel,Mark Halpern,Robert S. Hill,Alan J. Kogut,S. S. Meyer,Gregory S. Tucker,Janet Weiland,Edward J. Wollack,Edward L. Wright +19 more
TL;DR: In this article, the Wilkinson Microwave Anisotropy Probe (WMAP) 5-year data were used to constrain the physics of cosmic inflation via Gaussianity, adiabaticity, the power spectrum of primordial fluctuations, gravitational waves, and spatial curvature.
Journal ArticleDOI
Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
Eiichiro Komatsu,Jo Dunkley,M. R. Nolta,Charles L. Bennett,B. Gold,Gary Hinshaw,Norman Jarosik,David L. Larson,Michele Limon,L. Page,David N. Spergel,Mark Halpern,Robert S. Hill,A. Kogut,S. S. Meyer,G. S. Tucker,Janet Weiland,Edward J. Wollack,Edward L. Wright +18 more
TL;DR: In this paper, the authors show that the tensor-to-scalar ratio r 1 is disfavored regardless of r. They provide a set of "WMAP distance priors, to test a variety of dark energy models.
Journal ArticleDOI
A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
TL;DR: The mass of supermassive black holes correlate almost perfectly with the velocity dispersions of their host bulges, Mbh ∝ σα, where α = 48 ± 05.