SIMBAD references

2008MNRAS.384.1387V - Mon. Not. R. Astron. Soc., 384, 1387-1392 (2008/March-2)

Compact massive objects in Virgo galaxies: the black hole population.


Abstract (from CDS):

We investigate the distribution of massive black holes (MBHs) in the Virgo cluster. Observations suggest that active galactic nuclei activity is widespread in massive galaxies (M*≳ 1010M), while at lower galaxy masses star clusters are more abundant, which might imply a limited presence of central black holes in these galaxy-mass regimes. We explore if this possible threshold in MBH hosting is linked to nature, nurture or a mixture of both. The nature scenario arises naturally in hierarchical cosmologies, as MBH formation mechanisms typically are efficient in biased systems, which would later evolve into massive galaxies. Nurture, in the guise of MBH ejections following MBH mergers, provides an additional mechanism that is more effective for low mass, satellite galaxies. The combination of inefficient formation, and lower retention of MBHs, leads to the natural explanation of the distribution of compact massive objects in Virgo galaxies. If MBHs arrive to the correlation with the host mass and velocity dispersion during merger-triggered accretion episodes, sustained tidal stripping of the host galaxies creates a population of MBHs which lie above the expected scaling between the holes and their host mass, suggesting a possible environmental dependence.

Abstract Copyright: 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): black hole physics - galaxies: clusters: general - galaxies: nuclei - cosmology: theory

Simbad objects: 7

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