{
  "id": "2207.12977",
  "version": "v1",
  "published": "2022-07-26T15:37:15.000Z",
  "updated": "2022-07-26T15:37:15.000Z",
  "title": "A new resonance-like feature in the outer disc of the Milky Way",
  "authors": [
    "Ronald Drimmel",
    "Shourya Khanna",
    "Elena D'Onghia",
    "Thorsten Tepper-García",
    "Joss Bland-Hawthorn",
    "Laurent Chemin",
    "Vincenzo Ripepi",
    "Mercé Romero-Gómez",
    "Pau Ramos",
    "Eloisa Poggio",
    "Rene Andrae",
    "Ronny Blomme",
    "Tristan Cantat-Gaudin",
    "Alfred Castro-Ginard",
    "Gisella Clementini",
    "Francesca Fiqueras",
    "Yves Frémat",
    "Morgan Fouesneau",
    "Kevin Jardin",
    "Alex Lobel",
    "Douglas Marshall",
    "Tatiana Muraveva"
  ],
  "comment": "12 pages, 11 figures, submitted to A&A. Comments welcome",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Modern astrometric and spectroscopic surveys have revealed a wealth of structure in the phase space of stars in the Milky Way, with evidence of resonance features and non-equilibrium processes. Using Gaia DR3, we present evidence of a new resonance-like feature in the outer disc of the Milky Way. The feature is most evident in the angular momentum distribution of the young Classical Cepheids, a population for which we can derive accurate distances over much of the Galactic disc. We then search for similar features in the outer disc using a much larger sample of red giant stars, as well as a compiled list of over 31 million stars with spectroscopic line-of-sight velocity measurements. While much less evident in these two older samples, the distribution of stars in action-configuration space suggests that resonance features are present here as well. The position of the feature in action-configuration space suggests that the new feature may be related to the Galactic bar, but other possibilities are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-07-26T15:37:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "outer disc",
      "milky way",
      "resonance-like feature",
      "resonance features",
      "spectroscopic line-of-sight velocity measurements"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}