{
  "id": "astro-ph/0007369",
  "version": "v1",
  "published": "2000-07-25T11:54:56.000Z",
  "updated": "2000-07-25T11:54:56.000Z",
  "title": "The correlation between black hole mass and bulge velocity dispersion in hierarchical galaxy formation models",
  "authors": [
    "Martin G. Haehnelt",
    "Guinevere Kauffmann"
  ],
  "comment": "5 pages, LaTeX, 3 postscript figures included; submitted to MNRAS",
  "journal": "Mon.Not.Roy.Astron.Soc. 318 (2000) L35",
  "doi": "10.1046/j.1365-8711.2000.03989.x",
  "categories": [
    "astro-ph"
  ],
  "abstract": "Recent work has demonstrated that there is a tight correlation between the mass of a black hole and the velocity dispersion of the bulge of its host galaxy. We show that the model of Kauffmann & Haehnelt, in which bulges and supermassive black holes both form during major mergers, produces a correlation between M_bh and sigma with slope and scatter comparable to the observed relation. In the model, the M_bh - sigma relation is significantly tighter than the correlation between black hole mass and bulge luminosity or the correlation between bulge luminosity and velocity dispersion. There are two reasons for this: i) the gas masses of bulge progenitors depend on the velocity dispersion but not on the formation epoch of the bulge, whereas the stellar masses of the progenitors depend on both; ii) mergers between galaxies move black holes along the observed M_bh - sigma relation, even at late times when the galaxies are gas-poor and black holes grow mainly by merging of pre-existing black holes. We conclude that the small scatter in the observed M_bh - sigma relation is consistent with a picture in which bulges and black holes form over a wide range in redshift.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-07-25T11:54:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole mass",
      "hierarchical galaxy formation models",
      "bulge velocity dispersion",
      "correlation",
      "sigma relation"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 546821
    }
  }
}