{
  "id": "1610.02773",
  "version": "v1",
  "published": "2016-10-10T05:28:04.000Z",
  "updated": "2016-10-10T05:28:04.000Z",
  "title": "The SAMI Galaxy Survey: Asymmetry in Gas Kinematics and its links to Stellar Mass and Star Formation",
  "authors": [
    "J. V. Bloom",
    "L. M. R. Fogarty",
    "S. M. Croom",
    "A. Schaefer",
    "J. J. Bryant",
    "L. Cortese",
    "S. Richards",
    "J. Bland-Hawthorn",
    "I-T. Ho",
    "N. Scott",
    "G. Goldstein",
    "A. Medling",
    "S. Brough",
    "S. M. Sweet",
    "G. Cecil",
    "A. Lopez-Sanchez",
    "K. Glazebrook",
    "Q. Parker",
    "J. T. Allen",
    "M. Goodwin",
    "A. W. Green",
    "I. S. Konstantopoulos",
    "J. S. Lawrence",
    "N. Lorente",
    "M. S. Owers",
    "R. Sharp"
  ],
  "comment": "29 pages, 21 figures",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We study the properties of kinematically disturbed galaxies in the SAMI Galaxy Survey using a quantitative criterion, based on kinemetry (Krajnovic et al.). The approach, similar to the application of kinemetry by Shapiro et al. uses ionised gas kinematics, probed by H{\\alpha} emission. By this method 23+/-7% of our 360-galaxy sub-sample of the SAMI Galaxy Survey are kinematically asymmetric. Visual classifications agree with our kinemetric results for 90% of asymmetric and 95% of normal galaxies. We find stellar mass and kinematic asymmetry are inversely correlated and that kinematic asymmetry is both more frequent and stronger in low-mass galaxies. This builds on previous studies that found high fractions of kinematic asymmetry in low mass galaxies using a variety of different methods. Concentration of star forma- tion and kinematic disturbance are found to be correlated, confirming results found in previous work. This effect is stronger for high mass galaxies (log(M*) > 10) and indicates that kinematic disturbance is linked to centrally concentrated star formation. Comparison of the inner (within 0.5Re) and outer H{\\alpha} equivalent widths of asymmetric and normal galaxies shows a small but significant increase in inner equivalent width for asymmetric galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-10-10T05:28:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sami galaxy survey",
      "star formation",
      "stellar mass",
      "gas kinematics",
      "kinematic asymmetry"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 29,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}