Evidence for Rapidly Spinning Black Holes in Quasars
Open Access
- 25 April 2006
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 642 (2), L111-L114
- https://doi.org/10.1086/504842
Abstract
It has long been believed that accretion onto supermassive black holes powers quasars, but there has been relatively few observational constraints on the spins of the black holes. We address this problem by estimating the average radiative efficiencies of a large sample of quasars selected from the Sloan Digital Sky Survey, by combining their luminosity function and their black hole mass function. Over the redshift interval $0.4
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