{
  "id": "2403.09926",
  "version": "v1",
  "published": "2024-03-14T23:55:21.000Z",
  "updated": "2024-03-14T23:55:21.000Z",
  "title": "The Next Generation Virgo Cluster Survey (NGVS). XXVII.The Size and Structure of Globular Cluster Systems and their Connection to Dark Matter Halos",
  "authors": [
    "Sungsoon Lim",
    "Eric W. Peng",
    "Patrick Côté",
    "Laura Ferrarese",
    "Joel C. Roediger",
    "Chengze Liu",
    "Chelsea Spengler",
    "Elisabeth Sola",
    "Pierre-Alain Duc",
    "Laura V. Sales",
    "John P. Blakeslee",
    "Jean-Charles Cuillandre",
    "Patrick R. Durrell",
    "Eric Emsellem",
    "Stephen D. J. Gwyn",
    "Ariane Lançon",
    "Francine R. Marleau",
    "J. Christopher Mihos",
    "Oliver Müller",
    "Thomas H. Puzia",
    "Rubén Sánchez-Janssen"
  ],
  "comment": "28 pages, 18 Figures, 3 tables, accepted for publication in ApJ",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We study the size and structure of globular clusters (GC) systems of 118 early-type galaxies from the NGVS, MATLAS, and ACSVCS surveys. Fitting S\\'ersic profiles, we investigate the relationship between effective radii of GC systems ($R_{e, \\rm gc}$) and galaxy properties. GC systems are 2--4 times more extended than host galaxies across the entire stellar mass range of our sample ($10^{8.3} < M_* < 10^{11.6}~M_{\\odot}$). The relationship between $R_{e, \\rm gc}$ and galaxy stellar mass exhibits a characteristic \"knee\" at a stellar mass of $M_p \\simeq 10^{10.8}$, similar to galaxy $R_e$--stellar mass relationship. We present a new characterization of the traditional blue and red GC color sub-populations, describing them with respect to host galaxy $(g'-i')$ color ($\\Delta_{gi}$): GCs with similar colors to their hosts have a \"red\" $\\Delta_{gi}$, and those significantly bluer GCs have a \"blue\" $\\Delta_{gi}$. The GC populations with red $\\Delta_{gi}$, even in dwarf galaxies, are twice as extended as the stars, suggesting that formation or survival mechanisms favor the outer regions. We find a tight correlation between $R_{e, \\rm gc}$ and the total number of GCs, with intrinsic scatter $\\lesssim 0.1$ dex spanning two and three orders of magnitude in size and number, respectively. This holds for both red and blue subpopulations, albeit with different slopes. Assuming that $N_{GC, Total}$ correlates with $M_{200}$, we find that the red GC systems have effective radii of roughly 1-5\\% $R_{\\rm 200}$, while the blue GC systems in massive galaxies can have sizes as large as $\\sim$10\\% $R_{\\rm 200}$. Environmental dependence on $R_{e, \\rm gc}$ is also found, with lower density environments exhibiting more extended GC systems at fixed mass.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-03-14T23:55:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "generation virgo cluster survey",
      "globular cluster systems",
      "dark matter halos",
      "gc systems",
      "stellar mass"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 28,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}