Black Hole Masses and Scaling Relationships in Brightest Cluster Galaxies

Details Black Hole Masses and Scaling Relationships in Brightest Cluster Galaxies Black Hole Masses and Scaling Relationships in Brightest Cluster Galaxies

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21930702m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #307.02

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Scientific paper

We present stellar dynamical measurements of black hole masses in five nearby Brightest Cluster Galaxies. Our measurements include the most massive black holes detected by direct methods and substantially increase the sample size for the high-mass ends of the black hole-bulge scaling relationships. Using our new measurements and an updated sample of black hole masses from other investigators, we find that the MBH-sigma relationship steepens at both the high- and low-mass ends. The most luminous galaxies exhibit large intrinsic scatter in black hole mass, in opposition to the tight MBH-L relationship predicted by models of successive hierarchical mergers. Some scatter may arise from the early growth of 109 -1010 solar-mass black holes, as indicated by the most powerful high-redshift quasars.

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