Cosmic Evolution of Quasar Clustering: Implications for the Host Haloes

Details Cosmic Evolution of Quasar Clustering: Implications for the Host Haloes Cosmic Evolution of Quasar Clustering: Implications for the Host Haloes

2004-06-01

arxiv.org/abs/astro-ph/0406036v2

Astronomy and Astrophysics

Astrophysics

23 pages,11 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2004.08408.x

We present detailed clustering measurements from the 2dF QSO Redshift Survey (2QZ) in the redshift range 0.810^{12} M_sun and that the mean mass of their host haloes is of the order of 10^{13} M_sun. The observed clustering is consistent with assuming that the locally observed correlation between black-hole mass and host-galaxy circular velocity is still valid at z>1. From the fraction of haloes which contain active quasars, we infer that the characteristic quasar lifetime is t_Q ~ a few x 10^7 yr at z~1 and approaches 10^8 yr at higher redshifts.

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