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arXiv · 1603.08886

The influence of mergers and ram-pressure stripping on black hole-bulge correlations

Yonadav Barry Ginat·Yohai Meiron·Noam Soker
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Abstract

We analyse the scatter in the correlation between super-massive black hole (SMBH) mass and bulge stellar mass of the host galaxy, and infer that it cannot be accounted for by mergers alone. The merger-only scenario, where small galaxies merge to establish a proportionality relation between the SMBH and bulge masses, leads to a scatter around the linear proportionality line that increases with the square root of the SMBH (or bulge) mass. By examining a sample of 103 galaxies we find that the intrinsic scatter increases more rapidly than expected from the merger-only scenario. The correlation between SMBH masses and their host galaxy properties is therefore more likely to be determined by a negative feedback mechanism that is driven by an active galactic nucleus. We find a hint that some galaxies with missing stellar mass reside close to the centre of clusters and speculate that ram-pressure stripping of gas off the young galaxy as it moves near the cluster centre, might explain the missing stellar mass at later times.

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Yonadav Barry Ginat, Yohai Meiron, Noam Soker. 2016-06-27. The influence of mergers and ram-pressure stripping on black hole-bulge correlations. https://doi.org/10.1093/mnras%2Fstw1566

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