Raphael Sadoun, Jacques Colin
We find evidence that the mass MBH of central supermassive black holes (SMBHs) correlates with the velocity dispersion sigma_GC of globular cluster systems of their host galaxies. This extends the well-known MBH - sigma_b relation between black hole mass and velocity dispersion of the host spheroidal component. We compile published measurements of both MBH and sigma_GC for a sample of 13 systems and find the relation log(MBH) = alpha + beta log(sigma_GC/200) with alpha = 8.64 \pm 0.09 and beta = 3.78 \pm 0.53. We also consider blue (metal-poor) and red (metal-rich) globular clusters sub-populations separately and obtain a tighter correlation using only the velocity dispersion sigma_GC^red of the red clusters with an intrinsic scatter eps_0 = 0.20 dex compared to eps_0 = 0.27 dex for the MBH - sigma_b of our sample. We use our MBH - sigma_GC relation to predict the masses of black holes in 5 galaxies for which sigma_GC^red is measured. This correlation can also be used to distinguish between different scenarios of the origin of the MBH - sigma_b relation.
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http://arxiv.org/abs/1204.0144
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