Evolution Of Correlations Between Low-mass Black Holes And Host Galaxies

Details Evolution Of Correlations Between Low-mass Black Holes And Host Galaxies Evolution Of Correlations Between Low-mass Black Holes And Host Galaxies

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810706z&link_type=abstract

American Astronomical Society, AAS Meeting #218, #107.06; Bulletin of the American Astronomical Society, Vol. 43, 2011

Mathematics

Logic

Scientific paper

The correlation between low-mass black holes and their host galaxies is an interesting topic in galaxy formation and evolution. Recent observations have shown the M-sigma relation at low mass differ from the relation of the massive elliptical galaxies.
Here we present results from cosmological high-resolution hydrodynamic simulations using the Aquila initial conditions focusing on a Milky Way-sized halo. Different physical processes besides gas dynamics are included especially star formation and black hole growth and feedback.
We find an evolution of both the Fundamental Plane(FP) relation and M-sigma correlation. We expect galaxies have a higher velocity dispersion for a higher redshift. Such galaxies, if containing a central black hole, would fall below the M-sigma relation defined by elliptical galaxies before the system reaches equilibrium. However, there is not much evolution in the M-M* correlation across cosmic time which indicated some relation between their growth histories.
Our results suggest that these well-known correlations have
different origins: the M-sigma and FP relations are results of dynamical virialization of the system, while M-M* is the result of regulated star formation and black hole growth.

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