{
  "id": "1806.00698",
  "version": "v1",
  "published": "2018-06-02T20:05:39.000Z",
  "updated": "2018-06-02T20:05:39.000Z",
  "title": "Mass Modeling of Frontier Fields Cluster MACS J1149.5+2223 Using Strong and Weak Lensing",
  "authors": [
    "Emily Quinn Finney",
    "Maruša Bradač",
    "Kuang-Han Huang",
    "Austin Hoag",
    "Takahiro Morishita",
    "Tim Schrabback",
    "Tommaso Treu",
    "Kasper Borello Schmidt",
    "Brian C. Lemaux",
    "Xin Wang",
    "Charlotte Mason"
  ],
  "comment": "15 pages, 6 figures, published in ApJ May 23, 2018",
  "journal": "The Astrophysical Journal, 859, 1, 2018",
  "doi": "10.3847/1538-4357/aabf97",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We present a gravitational lensing model of MACS J1149.5+2223 using ultra-deep Hubble Frontier Fields imaging data and spectroscopic redshifts from HST grism and VLT/MUSE spectroscopic data. We create total mass maps using 38 multiple images (13 sources) and 608 weak lensing galaxies, as well as 100 multiple images of 31 star-forming regions in the galaxy that hosts Supernova Refsdal. We find good agreement with a range of recent models within the HST field of view. We present a map of the ratio of projected stellar mass to total mass ($f_{\\star}$), and find that the stellar mass fraction for this cluster peaks on the primary BCG. Averaging within a radius of 0.3 Mpc, we obtain a value of $\\langle f_{\\star} \\rangle = 0.012^{+0.004}_{-0.003}$, consistent with other recent results for this ratio in cluster environments, though with a large global error (up to $\\delta f_{\\star} = 0.005$) primarily due to the choice of an IMF. We compare values of $f_{\\star}$ and measures of star formation efficiency for this cluster to other Hubble Frontier Fields clusters studied in the literature, finding that MACS1149 has a higher stellar mass fraction than these other clusters, but a star formation efficiency typical of massive clusters.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-02T20:05:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "frontier fields cluster macs",
      "weak lensing",
      "frontier fields imaging data",
      "star formation efficiency",
      "mass modeling"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}