Constraints on the correlation between QSO luminosity and host halo mass from high-redshift quasar clustering
Abstract
Recent measurements of high-redshift quasar (QSO) clustering from the Sloan Digital Sky Survey indicate that QSOs at z ~ 4 have a bias <b> ~= 14. We find that this extremely high clustering amplitude, combined with the corresponding space density, constrains the dispersion in the L-Mh relation to be less than 50per cent at 99per cent confidence for the most conservative case of a 100per cent duty cycle. This upper limit to the intrinsic dispersion provides as strong a constraint as current upper limits to the intrinsic dispersion in the local MBH-σ relation and the ratio of bolometric to Eddington luminosity of luminous QSOs.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2008
- DOI:
- 10.1111/j.1365-2966.2008.13817.x
- arXiv:
- arXiv:0711.4109
- Bibcode:
- 2008MNRAS.390.1179W
- Keywords:
-
- quasars: general;
- dark matter;
- large-scale structure of Universe;
- Astrophysics
- E-Print:
- 6 pages, 4 figures. Minor revisions to address questions from referee. References updated