%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 }