Downsizing of supermassive black holes from the SDSS quasar survey

Details Downsizing of supermassive black holes from the SDSS quasar survey Downsizing of supermassive black holes from the SDSS quasar survey

2009-03-24

arxiv.org/abs/0903.4136v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

9 pages, 9 figures. To appear in MNRAS

Scientific paper

Starting from the ~50000 quasars of the Sloan Digital Sky Survey for which MgII line width and 3000 A monochromatic flux are available, we aim to study the dependence of the mass of active black holes on redshift. We focus on the observed distribution in the FWHM - nuclear luminosity plane, which can be reproduced at all redshifts assuming a limiting BH mass, a maximum Eddington ratio and a minimum luminosity (due to the survey flux limit). We study the z-dependence of the best fit parameters of assumed distributions at increasing redshift and find that the maximum mass of the quasar population evolves as log[M_BH(max)/M_Sun]~0.3z+9, while the maximum Eddington ratio (~0.45) is practically independent of cosmic time. These results are unaffected by the Malmquist bias.

Affiliated with

Also associated with

No associations

Rating

Downsizing of supermassive black holes from the SDSS quasar survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Downsizing of supermassive black holes from the SDSS quasar survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downsizing of supermassive black holes from the SDSS quasar survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-348305