QSOs from SDSS, 2QZ and 2SLAQ covering an order of magnitude in luminosity at
fixed redshift exhibit similar amplitudes of clustering. In addition, QSO
clustering evolution at z>0.5 is well fitted by a model that assumes a fixed
host halo mass, implying that QSOs may occur in a relatively narrow range of
halo and BH mass. We argue that the slow evolution of early-type galaxies out
to z~1-2 may also provide support for a slow evolution of QSO host BH masses.
The result would mean that if high-z QSOs radiate at Eddington rates then low-z
SyI must radiate at ~100x less than Eddington. We conclude that models where
QSOs radiate at L_Edd require M_BH and M_halo to be decoupled to circumvent the
clustering results. While single BH mass and flickering models fit the z>0.5
clustering results, they appear to be rejected by the z~0, M_BH-L relation from
reverberation mapping. We find that the inclusion of z<0.5 QSO clustering data
improves the fit of a long-lived QSO model and suggest that the predictions of
a PLE model for QSO BH masses agree reasonably with UV-bump and reverberation
estimates (abridged).
Description
[1105.2547] Do all QSOs have the same black hole mass?
%0 Generic
%1 Shanks2011
%A Shanks, T.
%A Croom, S. M.
%A Fine, S.
%A Ross, N. P.
%A Sawangwit, U.
%D 2011
%K blackhole halo mass qso
%T Do all QSOs have the same black hole mass?
%U http://arxiv.org/abs/1105.2547
%X QSOs from SDSS, 2QZ and 2SLAQ covering an order of magnitude in luminosity at
fixed redshift exhibit similar amplitudes of clustering. In addition, QSO
clustering evolution at z>0.5 is well fitted by a model that assumes a fixed
host halo mass, implying that QSOs may occur in a relatively narrow range of
halo and BH mass. We argue that the slow evolution of early-type galaxies out
to z~1-2 may also provide support for a slow evolution of QSO host BH masses.
The result would mean that if high-z QSOs radiate at Eddington rates then low-z
SyI must radiate at ~100x less than Eddington. We conclude that models where
QSOs radiate at L_Edd require M_BH and M_halo to be decoupled to circumvent the
clustering results. While single BH mass and flickering models fit the z>0.5
clustering results, they appear to be rejected by the z~0, M_BH-L relation from
reverberation mapping. We find that the inclusion of z<0.5 QSO clustering data
improves the fit of a long-lived QSO model and suggest that the predictions of
a PLE model for QSO BH masses agree reasonably with UV-bump and reverberation
estimates (abridged).
@misc{Shanks2011,
abstract = { QSOs from SDSS, 2QZ and 2SLAQ covering an order of magnitude in luminosity at
fixed redshift exhibit similar amplitudes of clustering. In addition, QSO
clustering evolution at z>0.5 is well fitted by a model that assumes a fixed
host halo mass, implying that QSOs may occur in a relatively narrow range of
halo and BH mass. We argue that the slow evolution of early-type galaxies out
to z~1-2 may also provide support for a slow evolution of QSO host BH masses.
The result would mean that if high-z QSOs radiate at Eddington rates then low-z
SyI must radiate at ~100x less than Eddington. We conclude that models where
QSOs radiate at L_Edd require M_BH and M_halo to be decoupled to circumvent the
clustering results. While single BH mass and flickering models fit the z>0.5
clustering results, they appear to be rejected by the z~0, M_BH-L relation from
reverberation mapping. We find that the inclusion of z<0.5 QSO clustering data
improves the fit of a long-lived QSO model and suggest that the predictions of
a PLE model for QSO BH masses agree reasonably with UV-bump and reverberation
estimates (abridged).
},
added-at = {2011-05-14T22:36:11.000+0200},
author = {Shanks, T. and Croom, S. M. and Fine, S. and Ross, N. P. and Sawangwit, U.},
biburl = {https://www.bibsonomy.org/bibtex/2ff0e519bf48fda3ab811ac1d9574d9e7/miki},
description = {[1105.2547] Do all QSOs have the same black hole mass?},
interhash = {13963dd0d480cc9767927d09e787cdd0},
intrahash = {ff0e519bf48fda3ab811ac1d9574d9e7},
keywords = {blackhole halo mass qso},
note = {cite arxiv:1105.2547
Comment: 10 pages, 5 figures, resubmitted to MNRAS after minor revision},
timestamp = {2011-05-14T22:36:11.000+0200},
title = {Do all QSOs have the same black hole mass?},
url = {http://arxiv.org/abs/1105.2547},
year = 2011
}