{
  "id": "2208.04292",
  "version": "v1",
  "published": "2022-08-08T17:30:54.000Z",
  "updated": "2022-08-08T17:30:54.000Z",
  "title": "Early Results From GLASS-JWST. XVII: Building the First Galaxies -- Chapter 1. Star Formation Histories at 5<z < 7",
  "authors": [
    "A. Dressler",
    "B. Vulcani",
    "T. Treu",
    "M. Rieke",
    "C. Burns",
    "A. Calabro'",
    "A. Bonchi",
    "M. Castellano",
    "A. Fontana",
    "N. Leethochawalit",
    "C. Mason",
    "E. Merlin",
    "T. Morishita",
    "D. Paris",
    "A. Mercurio",
    "T. Nanayakkara",
    "B. M. Poggianti",
    "P. Santini",
    "X. Wang",
    "K. Misfelt",
    "D. P. Stark",
    "C. Wilmer"
  ],
  "comment": "submitted to ApJL",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "JWST observations of high redshift galaxies are used to measure their star formation histories -- the buildup of stellar mass in the earliest galaxies. A novel analysis program, SEDz*, compares near-IR spectral energy distributions for galaxies with redshift $5<z<7$ to combinations of stellar population templates evolved from $z=12$. We exploit NIRCam imaging in 7 wide bands covering $1-5\\mu m$, taken in the context of the GLASS-JWST-ERS program, and use SEDz* to solve for well-constrained star formation histories for 24 exemplary galaxies in this redshift range. In this first look we find variety of histories, from long, continuous star formation over $5<z<12$, short but intense starbursts -- sometimes repeating, and, most commonly, contiguous, steady mass buildup lasting ~0.5 Myr, possibly the seeds of today's typical, M* galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-08-08T17:30:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "first galaxies",
      "early results",
      "glass-jwst",
      "near-ir spectral energy distributions",
      "steady mass buildup"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}