The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy

Details The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy The black hole mass of BL Lacs from stellar velocity dispersion of the host galaxy

2001-12-18

arxiv.org/abs/astro-ph/0112423v1

Astronomy and Astrophysics

Astrophysics

2 pages, to appear in ESO Astrophysics Symposium "The Mass of Galaxies at Low and High Redshift", eds. R. Bender & A. Renzini

Scientific paper

We present the first results from our on-going program to estimate black hole masses [M(BH)] of nearby BL Lac objects. The estimates are based on stellar velocity dispersion (sigma) of the BL Lac host galaxies from optical spectroscopy, and the recently found tight correlation between M{BH} and sigma in nearby early-type galaxies. For the first three BL Lacs, we find log M(BH) = 7.5 - 8.7 and M(BH)/M(host) = 0.03 - 0.1.

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