期刊
ASTROPHYSICAL JOURNAL
卷 569, 期 1, 页码 83-90出版社
UNIV CHICAGO PRESS
DOI: 10.1086/339233
关键词
black hole physics; dark matter; galaxies : evolution; galaxies : halos; galaxies : nuclei
In this paper, we consider the growth of seed black holes immersed in dark matter halos. We investigate first the adiabatic growth in various initial distribution functions (isothermal; power law; and Navarro, Frenk, and White) and find the resulting density, radial velocity, and anisotropy profiles. In addition, we estimate the growth rate for a given black hole mass in the corresponding adiabatically modified dark matter distribution function. Only in the isothermal case is there a convincing black hole mass-age relation. By calculating the line-of-sight velocity dispersion for the various cases as a function of the black hole mass, we find the predicted adiabatic M-BH-sigma relation, which never approaches the recently observed power law. We conclude by abandoning adiabaticity, suggesting that the black hole grows proportionally to the dark matter halo itself on a dynamic timescale. This allows us to relate the observed M-BH-sigma relation to the cosmological power spectrum on galactic scales by using dimensional scaling arguments.
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