Evidence for Black Holes in Active Galactic Nuclei

Details Evidence for Black Holes in Active Galactic Nuclei Evidence for Black Holes in Active Galactic Nuclei

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1053....7w&link_type=abstract

OBSERVATIONAL EVIDENCE FOR BLACK HOLES IN THE UNIVERSE: Proceedings of the 2nd Kolkata Conference on Observational Evidence for

Physics

2

Galactic Nuclei, Circumnuclear Matter, And Bulges, Active And Peculiar Galaxies And Related Systems, Quasars, Mass Loss And Stellar Winds

Scientific paper

Massive black holes detected in the centers of many nearby galaxies show a linear correlation between their mass and the luminosity of the host bulge (spheroid), the black hole mass being about 0.1% of the bulge mass. Using reverberation mapping which allows relatively reliable determination of the BH mass of AGNs, we show that massive BHs of AGNs relate to their host spheroids in the same way as ordinary (inactive) galaxies, with the exeption of narrow line AGNs (NLS1s and narrow line quasars) which apparently have significantly lower BH/bulge ratios. It is not clear whether narrow line AGNs are outstanding also in the Mbh-velocity dispersion relation. AGN also follow the M-σ relation, between the BH mass and the stellar velocity dispersion in the host bulge.

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