{
  "id": "2207.13625",
  "version": "v1",
  "published": "2022-07-27T16:37:10.000Z",
  "updated": "2022-07-27T16:37:10.000Z",
  "title": "Early results from GLASS-JWST. IX: First spectroscopic confirmation of low-mass quiescent galaxies at $z>2$ with NIRISS",
  "authors": [
    "Danilo Marchesini",
    "Gabriel Brammer",
    "Takahiro Morishita",
    "Pietro Bergamini",
    "Xin Wang",
    "Marusa Bradac",
    "Guido Roberts-Borsani",
    "Victoria Strait",
    "Tommaso Treu",
    "Adriano Fontana",
    "Tucker Jones",
    "Paola Santini",
    "Benedetta Vulcani",
    "Ana Acebron",
    "Antonello Calabrò",
    "Marco Castellano",
    "Karl Glazebrook",
    "Claudio Grillo",
    "Amata Mercurio",
    "Themiya Nanayakkara",
    "Piero Rosati",
    "Chanita Tubthong",
    "Eros Vanzella"
  ],
  "comment": "Submitted to ApJL. 8 pages, 3 figures, 1 table",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "How passive galaxies form, and the physical mechanisms which prevent star formation over long timescales, are some of the most outstanding questions in understanding galaxy evolution. The properties of quiescent galaxies over cosmic time provide crucial information to identify the quenching mechanisms. Passive galaxies have been confirmed and studied out to $z\\sim4$, but all of these studies have been limited to massive systems (mostly with $\\log{(M_{\\rm star}/M_{\\odot})}>10.8$). Using James Webb Space Telescope (JWST) NIRISS grism slitless spectroscopic data from the GLASS JWST ERS program, we present spectroscopic confirmation of two quiescent galaxies at $z_{\\rm spec}=2.650^{+0.004}_{-0.006}$ and $z_{\\rm spec}=2.433^{+0.032}_{-0.016}$ (3$\\sigma$ errors) with stellar masses of $\\log{(M_{\\rm star}/M_{\\odot})}=10.53^{+0.18}_{-0.06}$ and $\\log{(M_{\\rm star}/M_{\\odot})}=9.93^{+0.06}_{-0.07}$ (corrected for magnification factors of $\\mu=2.0$ and $\\mu=2.1$, respectively). The latter represents the first spectroscopic confirmation of the existence of low-mass quiescent galaxies at cosmic noon, showcasing the power of JWST to identify and characterize this enigmatic population.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-07-27T16:37:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "first spectroscopic confirmation",
      "low-mass quiescent galaxies",
      "early results",
      "glass jwst ers program",
      "niriss grism slitless spectroscopic data"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}