{
  "id": "1605.05314",
  "version": "v1",
  "published": "2016-05-17T19:59:35.000Z",
  "updated": "2016-05-17T19:59:35.000Z",
  "title": "Differences in the structural properties and star-formation rates of field and cluster galaxies at z~1",
  "authors": [
    "Rebecca J. Allen",
    "Glenn G. Kacprzak",
    "Karl Glazebrook",
    "Kim-Vy H. Tran",
    "Lee R. Spitler",
    "Caroline M. S. Straatman",
    "Michael Cowley",
    "Themiya Nanayakkara"
  ],
  "comment": "13 pages, 10 figures, accepted by Apj",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We investigate the dependance of galaxy sizes and star-formation rates (SFRs) on environment using a mass-limited sample of quiescent and star-forming galaxies with M>10^9.5 at z=0.92 selected from the NMBS survey. Using the GEEC2 spectroscopic cluster catalog and the accurate photometric redshifts from NMBS, we select quiescent and star-forming cluster (sigma=490 km/s) galaxies within two virial radius, Rvir, intervals of 0.5<Rvir<2 and Rvir<0.5. Galaxies residing outside of 2 Rvir of both the cluster centres and additional candidate over-densities are defined as our field sample. Galaxy structural parameters are measured from the COSMOS legacy HST/ACS F814W image. The sizes and Sersic indices of quiescent field and cluster galaxies have the same distribution regardless of Rvir. However, cluster star-forming galaxies within 0.5 Rvir have lower mass-normalised average sizes, by 16${\\pm}7\\%$, and a higher fraction of Sersic indices with n>1, than field star-forming galaxies. The average SFRs of star-forming cluster galaxies show a trend of decreasing SFR with clustocentric radius. The mass-normalised average SFR of cluster star-forming galaxies is a factor of 2-2.5 (7-9 sigma) lower than that of star-forming galaxies in the field. While we find no significant dependence on environment for quiescent galaxies, the properties of star-forming galaxies are affected, which could be the result of environment acting on their gas content.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-05-17T19:59:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "star-formation rates",
      "cluster galaxies",
      "star-forming galaxies",
      "structural properties",
      "average sfr"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}