How to form bulges/ellipticals in dark halos as fast as central black holes?

Details How to form bulges/ellipticals in dark halos as fast as central black holes? How to form bulges/ellipticals in dark halos as fast as central black holes?

2007-09-27

arxiv.org/abs/0709.4496v1

Astronomy and Astrophysics

Astrophysics

Proceedings on "Galaxy Bulges", IAU Symposium 245 in July 2007, Oxford

Scientific paper

10.1017/S174392130801716X

Gravity is nearly a universal constant in the cusp of an NFW galaxy halo. Inside this external field an isothermal gas sphere will collapse and trigger a starburst if above a critical central pressure. Thus formed spheroidal stellar systems have Sersic-profile and satisfy the Faber-Jackson relation. The process is consistent with observed starbursts. We also recover the M_BH vs. velocity dispersion relation, if the gas collapse is regulated or resisted by the feedback from radiation from the central BH.

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