{
  "id": "2411.02499",
  "version": "v1",
  "published": "2024-11-04T19:00:02.000Z",
  "updated": "2024-11-04T19:00:02.000Z",
  "title": "The empirical laws of galaxy dynamics: from gas kinematics to weak lensing",
  "authors": [
    "Federico Lelli",
    "Tobias Mistele",
    "Stacy S. McGaugh",
    "James M. Schombert",
    "Pengfei Li"
  ],
  "comment": "Invited review for the IAU General Assembly 2024, Focus Meeting 9 (6 pages, 3 figures)",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO",
    "gr-qc"
  ],
  "abstract": "Galaxies obey a set of strict dynamical laws, which imply a close coupling between the visible matter (stars and gas) and the observed dynamics (set by dark matter in the standard cosmological context). Here we review recent results from weak gravitational lensing, which allows studying the empirical laws of galaxy dynamics out to exceedingly large radii in both late-type galaxies (LTGs) and early-type galaxies (ETGs). We focus on three laws: (1) the circular velocity curves of both LTGs and ETGs remain indefinitely flat out to several hundreds of kpc; (2) the same baryonic Tully-Fisher relation is followed by LTGs and ETGs; (3) the same radial acceleration relation (RAR) is followed by LTGs and ETGs. Combining galaxy data with Solar System data, the RAR covers about 16 orders of magnitude in the Newtonian baryonic acceleration. Remarkably, these empirical facts were predicted a priori by MOND.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-11-04T19:00:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galaxy dynamics",
      "empirical laws",
      "gas kinematics",
      "weak lensing",
      "baryonic tully-fisher relation"
    ],
    "tags": [
      "review article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}