SMBH Spherically Symmetric Accretion Regulated by Violent Star Formation Feedback

Details SMBH Spherically Symmetric Accretion Regulated by Violent Star Formation Feedback SMBH Spherically Symmetric Accretion Regulated by Violent Star Formation Feedback

2008-07-16

arxiv.org/abs/0807.2662v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. To appear in the proceedings of the workshop "The Central Kiloparsec: Active Galactic Nuclei and Their Hos

Scientific paper

The mounting evidence for violent nuclear star formation in Seyfert galaxies has led us to consider the hydrodynamics of the matter reinserted by massive stars through strong stellar winds and supernovae, under the presence of a central massive BH. We show that in all cases there is a bimodal solution strongly weighted by the location of the stagnation radius (Rst), which splits the star cluster into two different zones. Matter reinserted within the stagnation volume is to be accreted by the BH while its outer counterpart would composed a star cluster wind. The mechanical power of the latter, ensures that there is no accretion of the ISM into the BH and thus the BH accretion and its luminosity is regulated by the star formation feedback. The location of the stagnation radius is a function of three parameters: the BH mass, the mechanical power (or mass) of the star formation event and the size of the star forming region. Here we present our self-consistent, stationary solution, discuss the accretion rates and BH luminosities and show that our model predicts the intrinsic link between the BH activity and the starburst parameters.

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