{
  "id": "1811.11676",
  "version": "v1",
  "published": "2018-11-28T16:57:45.000Z",
  "updated": "2018-11-28T16:57:45.000Z",
  "title": "The SAMI Galaxy Survey: Observing the environmental quenching of star formation in GAMA groups",
  "authors": [
    "A. L. Schaefer",
    "S. M. Croom",
    "N. Scott",
    "S. Brough",
    "J. T. Allen",
    "K. Bekki",
    "J. Bland-Hawthorn",
    "J. V. Bloom",
    "J. J. Bryant",
    "L. Cortese",
    "L. J. M. Davies",
    "C. Federrath",
    "L. M. R. Fogarty",
    "A. W. Green",
    "B. Groves",
    "A. M. Hopkins",
    "I. S. Konstantopoulos",
    "A. R. López-Sánchez",
    "J. S. Lawrence",
    "R. E. McElroy",
    "A. M. Medling",
    "M. S. Owers",
    "M. B. Pracy",
    "S. N. Richards",
    "A. S. G. Robotham",
    "J. van de Sande",
    "C. Tonini",
    "S. K. Yi"
  ],
  "comment": "22 Pages, 11 Figures, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We explore the radial distribution of star formation in galaxies in the SAMI Galaxy Survey as a function of their local group environment. Using a sample of galaxies in groups (with halo masses less than $ \\simeq 10^{14} \\, \\mathrm{M_{\\odot}}$) from the Galaxy And Mass Assembly Survey, we find signatures of environmental quenching in high-mass groups ($M_{G} > 10^{12.5} \\, \\mathrm{M_{\\odot}}$). The mean integrated specific star formation rate of star-forming galaxies in high-mass groups is lower than for galaxies in low-mass groups or that are ungrouped, with $\\Delta \\log(sSFR/\\mathrm{yr^{-1}}) = 0.45 \\pm 0.07$. This difference is seen at all galaxy stellar masses. In high-mass groups, star-forming galaxies more massive than $M_{*} \\sim 10^{10} \\, \\mathrm{M_{\\odot}}$ have centrally-concentrated star formation. These galaxies also lie below the star-formation main sequence, suggesting they may be undergoing outside-in quenching. Lower mass galaxies in high-mass groups do not show evidence of concentrated star formation. In groups less massive than $M_{G} = 10^{12.5} \\, \\mathrm{M_{\\odot}}$ we do not observe these trends. In this regime we find a modest correlation between centrally-concentrated star formation and an enhancement in total star formation rate, consistent with triggered star formation in these galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-11-28T16:57:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sami galaxy survey",
      "high-mass groups",
      "gama groups",
      "environmental quenching",
      "centrally-concentrated star formation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}