Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4

Details Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4 Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4

2009-07-17

arxiv.org/abs/0907.2963v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

9 pages, 8 figures. To appear in MNRAS

Scientific paper

Starting from the quasar sample of the Sloan Digital Sky Survey (SDSS) for which the CIV line is observed, we use an analysis scheme to derive the z-dependence of the maximum mass of active black holes, which overcomes the problems related to the Malmquist bias. The same procedure is applied to the low redshift sample of SDSS quasars for which Hbeta measurements are available. Combining with the results from the previously studied MgII sample, we find that the maximum mass of the quasar population increases as (1+z)^(1.64+/-0.04) in the redshift range 0.1

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