Radiative Feedback from Quasars and the Growth of Supermassive Black Holes

Details Radiative Feedback from Quasars and the Growth of Supermassive Black Holes Radiative Feedback from Quasars and the Growth of Supermassive Black Holes

2004-11-02

arxiv.org/abs/astro-ph/0411046v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. Proc. of the Conference on "Growing Black Holes" held in Garching on June 21-25, 2004, eds. A. Merloni, S.

Scientific paper

10.1007/11403913_73

We discuss the role of feedback via photoionization and Compton heating in the co-evolution of massive black holes at the center of spheroidal galaxies and their stellar and gaseous components. We first assess the energetics of the radiative feedback from a typical quasar on the ambient interstellar gas. We then demonstrate that the observed Mbh-sigma relation could be established at a relatively early epoch in galactic evolution when the formation of the stellar bulge was almost completed and the gas-to-stars mass ratio was reduced to a low level ~0.01 such that cooling could not keep up with radiative heating. A considerable amount of gas was expelled at that time and black hole accretion proceeded at a much lower rate thereafter.

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