{
  "id": "2109.06189",
  "version": "v1",
  "published": "2021-09-13T18:00:01.000Z",
  "updated": "2021-09-13T18:00:01.000Z",
  "title": "The SAMI Galaxy Survey: Mass and Environment as Independent Drivers of Galaxy Dynamics",
  "authors": [
    "Jesse van de Sande",
    "Scott M. Croom",
    "Joss Bland-Hawthorn",
    "Luca Cortese",
    "Nicholas Scott",
    "Claudia D. P. Lagos",
    "Francesco D'Eugenio",
    "Julia J. Bryant",
    "Sarah Brough",
    "Barbara Catinella",
    "Caroline Foster",
    "Brent Groves Katherine E. Harborne",
    "Ángel R. López-Sánchez",
    "Richard McDermid",
    "Anne Medling",
    "Matt S. Owers",
    "Samuel N. Richards",
    "Sarah M. Sweet",
    "Sam P. Vaughan"
  ],
  "comment": "22 pages and 17 figures, accepted for publication in MNRAS. Abstract abridged for Arxiv. The key figures of the paper are: 6, 8, 10, and 12",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "The kinematic morphology-density relation of galaxies is normally attributed to a changing distribution of galaxy stellar masses with the local environment. However, earlier studies were largely focused on slow rotators; the dynamical properties of the overall population in relation to environment have received less attention. We use the SAMI Galaxy Survey to investigate the dynamical properties of $\\sim$1800 early and late-type galaxies with $\\log(M_*/M_{\\odot})>9.5$ as a function of mean environmental overdensity ($\\Sigma_{5}$) and their rank within a group or cluster. By classifying galaxies into fast and slow rotators, at fixed stellar mass above $\\log(M_*/M_{\\odot})>10.5$, we detect a higher fraction ($\\sim3.4\\sigma$) of slow rotators for group and cluster centrals and satellites as compared to isolated-central galaxies. Focusing on the fast-rotator population, we also detect a significant correlation between galaxy kinematics and their stellar mass as well as the environment they are in. Specifically, by using inclination-corrected or intrinsic $\\lambda_{R_e}$ values, we find that, at fixed mass, satellite galaxies on average have the lowest $\\lambda_{\\,R_e,intr}$, isolated-central galaxies have the highest $\\lambda_{\\,R_e,intr}$, and group and cluster centrals lie in between. Similarly, galaxies in high-density environments have lower mean $\\lambda_{\\,R_e,intr}$ values as compared to galaxies at low environmental density. However, at fixed $\\Sigma_{5}$, the mean $\\lambda_{\\,R_e,intr}$ differences for low and high-mass galaxies are of similar magnitude as when varying $\\Sigma_{5}$ {($\\Delta \\lambda_{\\,R_e,intr} \\sim 0.05$. Our results demonstrate that after stellar mass, environment plays a significant role in the creation of slow rotators, while for fast rotators we also detect an independent, albeit smaller, impact of mass and environment on their kinematic properties.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-09-13T18:00:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sami galaxy survey",
      "independent drivers",
      "galaxy dynamics",
      "slow rotators",
      "isolated-central galaxies"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}