Constraints on the correlation between QSO luminosity and host halo mass from high-redshift quasar clustering

• Published in: Monthly notices of the Royal Astronomical Society Vol. 390; no. 3; pp. 1179 - 1184
• Main Authors: White, Martin, Martini, Paul, Cohn, J. D.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.11.2008; Blackwell Science; Oxford University Press
• Subjects: Astronomy; Astrophysics; Dark matter; Earth, ocean, space; Exact sciences and technology; large-scale structure of Universe; Luminosity; Quasars; quasars: general; Red shift; quasars: general; dark matter; large-scale structure of Universe; Quasars; Upper bound; Red shift; Dark matter; Correlations; Luminosity; Large-scale structure; Sky surveys
• ISSN: 0035-8711; 1365-2966
• DOI: 10.1111/j.1365-2966.2008.13817.x

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 50 per cent at 99 per cent confidence for the most conservative case of a 100 per 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.