{
  "id": "2207.11379",
  "version": "v1",
  "published": "2022-07-22T23:49:48.000Z",
  "updated": "2022-07-22T23:49:48.000Z",
  "title": "Early results from GLASS-JWST. XI: Stellar masses and mass-to-light ratio of z>7 galaxies",
  "authors": [
    "P. Santini",
    "A. Fontana",
    "M. Castellano",
    "N. Leethochawalit",
    "M. Trenti",
    "T. Treu",
    "D. Belfiori",
    "S. Birrer",
    "A. Bonchi",
    "E. Merlin",
    "C. Mason",
    "T. Morishita",
    "M. Nonino",
    "D. Paris",
    "G. Polenta",
    "P. Rosati",
    "L. Yang",
    "M. Bradac",
    "A. Calabrò",
    "A. Dressler",
    "K. Glazebrook",
    "D. Marchesini",
    "S. Mascia",
    "T. Nanayakkara",
    "L. Pentericci",
    "G. Roberts-Borsani",
    "C. Scarlata",
    "B. Vulcani",
    "Xin Wang"
  ],
  "comment": "Submitted to ApJL",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We exploit James Webb Space Telescope (JWST) NIRCam observations from the GLASS-JWST-Early Release Science program, to investigate galaxy stellar masses at z>7. We first show that JWST observations reduce the uncertainties on the stellar mass by a factor 5-10, when compared with the highest quality data sets available to date. We then study the UV mass-to-light ratio, finding that galaxies exhibit a wide range of $M/L_{UV}$ values for a given luminosity, indicative of a broad variety of physical conditions and star formation histories. As a consequence, previous estimates of the cosmic star stellar mass density - based on an average correlation between UV luminosity and stellar mass - can be biased by as much as a factor of 6. Our first exploration demonstrates that JWST represents a new era in our understanding of stellar masses at z>7, and therefore of the growth of galaxies prior to cosmic reionization.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-07-22T23:49:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mass-to-light ratio",
      "early results",
      "exploit james webb space telescope",
      "cosmic star stellar mass density",
      "highest quality data sets"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}