Black Hole Masses and Enrichment of z ~ 6 SDSS Quasars*
Jaron Kurk,Fabian Walter,Xiaohui Fan,Linhua Jiang,Dominik A. Riechers,Hans-Walter Rix,Laura Pentericci,Michael A. Strauss,Chris Carilli,Stefan Wagner +9 more
TLDR
In this paper, the authors measured the Fe II/Mg II line ratio as an observational proxy for the Fe/α-element ratio and derived a ratio of 27 ± 08 for their sample, which is similar to that found for lower redshift quasars.Abstract:
We present sensitive near-infrared spectroscopic observations for a sample of five z ~ 6 quasars These quasars are among the most distant, currently known quasars in the universe The spectra have been obtained using ISAAC at the VLT and include the C IV, Mg II, and Fe II lines We measure the Fe II/Mg II line ratio, as an observational proxy for the Fe/α-element ratio We derive a ratio of 27 ± 08 for our sample, which is similar to that found for lower redshift quasars; ie, we provide additional evidence for the lack of evolution in the Fe II/Mg II line ratio of quasars up to the highest redshifts This result demonstrates that star formation must have commenced at z ≥ 8 in the quasar hosts The line widths of the Mg II and C IV lines give two estimates for the black hole masses A third estimate is given by assuming that the quasars emit at their Eddington luminosity The derived masses using these three methods agree well, implying that the quasars are not likely to be strongly lensed We derive central black hole masses of (03-52) × 109 M☉ We use the difference between the redshift of Mg II (a proxy for the systemic redshift of the quasar) and the onset of the Gunn-Peterson trough to derive the extent of the ionized Stromgren spheres around our target quasars The derived physical radii are about 5 Mpc Using a simple ionization model, the emission of the central quasars would need of order 106-108 yr to create these cavities As the e-folding timescale for the central accreting black hole is on the order of a few times 107 yr, it can grow by one e-folding or less within this time spanread more
Citations
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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
Biases in Virial Black Hole Masses: An SDSS Perspective
TL;DR: In this paper, the authors presented a model that reproduces the observed virial mass distribution, quasar luminosity function, and line width distribution of their sample; it has an underlying BH mass distribution dN/dlog M ∝ M−2.
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.
Journal ArticleDOI
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
TL;DR: 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.
Journal ArticleDOI
Discovery of Three z > 6.5 Quasars in the VISTA Kilo-Degree Infrared Galaxy (VIKING) Survey
Bram Venemans,Joseph R. Findlay,William J. Sutherland,G. De Rosa,Richard G. McMahon,Robert A. Simcoe,Eduardo Gonzalez-Solares,Konrad Kuijken,James R. Lewis +8 more
TL;DR: In this article, the authors reported the discovery of three new z = 6.4 quasars in 332 deg$^{2}$ of the VISible and Infrared Survey Telescope for Astronomy Kilo-degree Infrared Galaxy (VIKING) survey, thus extending the number from 1 to 4.
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TL;DR: The Sloan Digital Sky Survey (SDSS) as mentioned in this paper provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of pi steradians above about Galactic latitude 30 degrees in five broad optical bands.
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TL;DR: The Sloan Digital Sky Survey (SDSS) as discussed by the authors provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the universe: a photometrically and astrometrically calibrated digital imaging survey of π sr above about Galactic latitude 30° in five broad optical bands to a depth of g' ~ 23 mag.
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A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
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TL;DR: In this paper, it was shown that the range of slopes arises mostly due of sys- tematic differences in the velocity dispersions used by different groups for the same galaxies, and that one significant component of the difference results from Ferrarese & Merritt's extrapolation of central velocity dispersion to re= 8( re is the effective radius) using an empirical formula.
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