The Black Hole Mass - Galaxy Age Relation

Details The Black Hole Mass - Galaxy Age Relation The Black Hole Mass - Galaxy Age Relation

2000-02-17

arxiv.org/abs/astro-ph/0002350v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, uses mn.sty. Accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03461.x

We present evidence that there is a significant correlation between the fraction of a galaxy's mass that lies in its central black hole and the age of the galaxy's stellar population. Since the absorption line indices that are used to estimate the age are luminosity weighted, they essentially measure the time since the last significant episode of star formation in the galaxy. The existence of this correlation is consistent with several theories of galaxy formation, including the currently-favoured hierarchical picture of galaxy evolution, which predicts just such a relation between black hole mass and the time since the last burst of merger-induced star formation. It is not consistent with models in which the massive black hole is primordial, and hence uncoupled from the stellar properties of the galaxy.

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