{
  "id": "1609.01713",
  "version": "v1",
  "published": "2016-09-06T20:00:00.000Z",
  "updated": "2016-09-06T20:00:00.000Z",
  "title": "The SLUGGS Survey: revisiting the correlation between X-ray luminosity and total mass of massive early-type galaxies",
  "authors": [
    "Duncan A. Forbes",
    "Adebusola Alabi",
    "Aaron J. Romanowsky",
    "Dong-Woo Kim",
    "Jean P. Brodie",
    "Giuseppina Fabbiano"
  ],
  "comment": "5 pages, 2 figures, accepted for publication in MNRAS Letters",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO",
    "astro-ph.HE"
  ],
  "abstract": "Here we utilise recent measures of galaxy total dynamical mass and X-ray gas luminosities (L$_{X,Gas}$) for a sample of 29 massive early-type galaxies from the SLUGGS survey to probe L$_{X,Gas}$--mass scaling relations. In particular, we investigate scalings with stellar mass, dynamical mass within 5 effective radii (R$_e$) and total virial mass. We also compare these relations with predictions from $\\Lambda$CDM simulations. We find a strong linear relationship between L$_{X,Gas}$ and galaxy dynamical mass within 5 R$_e$, which is consistent with the recent cosmological simulations of Choi et al. that incorporate mechanical heating from AGN. We conclude that the gas surrounding massive early-type galaxies was shock heated as it fell into collapsing dark matter halos so that L$_{X,Gas}$ is primarily driven by the depth of a galaxy's potential well. Heating by an AGN plays an important secondary role in determining L$_{X,Gas}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-09-06T20:00:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sluggs survey",
      "total mass",
      "x-ray luminosity",
      "surrounding massive early-type galaxies",
      "correlation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}