The Quasar Mass-Luminosity Plane II: High Mass Turnoff Evolution and a Synchronization Puzzle - Astrophysics > High Energy Astrophysical PhenomenaReport as inadecuate




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Abstract: We use 62,185 quasars from the Sloan Digital Sky Survey DR5 sample andstandard virial mass scaling laws based on the widths of H beta, Mg II, and CIV lines and adjacent continuum luminosities to explore the maximum mass ofquasars as a function of redshift, which we find to be sharp and evolving. Thisevolution is in the sense that high-mass black holes cease their luminousaccretion at higher redshift than lower-mass black holes. Further, turnoff forquasars at any given mass is more highly synchronized than would be expectedgiven the dynamics of their host galaxies. We investigate potential signaturesof the quasar turnoff mechanism, including a dearth of high-mass quasars at lowEddington ratio. These new results allow a closer examination of several commonassumptions used in modeling quasar accretion and turnoff.



Author: Charles L. Steinhardt, Martin Elvis

Source: https://arxiv.org/







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