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Article overview
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How to form bulges/ellipticals in dark halos as fast as central black holes? | | HongSheng Zhao
; Bing-Xiao Xu
; Xue-Bing Wu
; | | Date: |
27 Sep 2007 | | Abstract: | 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. | | Source: | arXiv, 0709.4496 | | Services: | Forum | Review | PDF | Favorites | |
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