{
  "id": "1511.00584",
  "version": "v1",
  "published": "2015-11-02T17:02:23.000Z",
  "updated": "2015-11-02T17:02:23.000Z",
  "title": "The Phase Space of z~1.2 SpARCS Clusters: Using Herschel to probe Dust Temperature as a Function of Environment and Accretion History",
  "authors": [
    "A. G. Noble",
    "T. M. A. Webb",
    "H. K. C. Yee",
    "A. Muzzin",
    "G. Wilson",
    "R. F. J. van der Burg",
    "M. L. Balogh",
    "D. L. Shupe"
  ],
  "comment": "14 pages, 7 figures, 2 tables; accepted for publication in ApJ",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "We present a five-band Herschel study (100-500um) of three galaxy clusters at z~1.2 from the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS). With a sample of 120 spectroscopically-confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity versus clustercentric radius), which probes the time-averaged galaxy density to which a galaxy has been exposed. We divide cluster galaxies into phase-space bins of (r/r200) x (v/sigma_v), tracing a sequence of accretion histories in phase space. Stacking optically star-forming cluster members on the Herschel maps, we measure average infrared star formation rates, and, for the first time in high-redshift galaxy clusters, dust temperatures for dynamically distinct galaxy populations---namely, recent infalls and those that were accreted onto the cluster at an earlier epoch. Proceeding from the infalling to virialized (central) regions of phase space, we find a steady decrease in the specific star formation rate and increase in the stellar age of star-forming cluster galaxies. We perform a probability analysis to investigate all acceptable infrared spectral energy distributions within the full parameter space and measure a ~4 sigma drop in the average dust temperature of cluster galaxies in an intermediate phase-space bin, compared to an otherwise flat trend with phase space. We suggest one plausible quenching mechanism which may be consistent with these trends, invoking ram-pressure stripping of the warmer dust for galaxies within this intermediate accretion phase.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-11-02T17:02:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "phase space",
      "probe dust temperature",
      "accretion history",
      "sparcs clusters",
      "infrared star formation rates"
    ],
    "publication": {
      "doi": "10.3847/0004-637X/816/2/48"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1402285
    }
  }
}