{
  "id": "1302.3173",
  "version": "v1",
  "published": "2013-02-13T17:46:24.000Z",
  "updated": "2013-02-13T17:46:24.000Z",
  "title": "Testing convective-core overshooting using period spacings of dipole modes in red giants",
  "authors": [
    "J. Montalban",
    "A. Miglio",
    "A. Noels",
    "M. -A. Dupret",
    "R. Scuflaire",
    "P. Ventura"
  ],
  "comment": "19 pages, 8 figures, accepted for publication in ApJ",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Uncertainties on central mixing in main sequence (MS) and core He-burning (He-B) phases affect key predictions of stellar evolution such as late evolutionary phases, chemical enrichment, ages etc. We propose a test of the extension of extra-mixing in two relevant evolutionary phases based on period spacing Delta_P of solar-like oscillating giants. From stellar models and their corresponding adiabatic frequencies (respectively computed with ATON and LOSC codes) we provide the first predictions of the observable Delta_P for stars in the red giant branch (RGB) and in the red clump (RC). We find: i) a clear correlation between Delta_P and the mass of the helium core (M_He); the latter in intermediate-mass stars depends on the MS overshooting, hence it can be used to set constraints on extra mixing during MS when coupled with chemical composition; ii) a linear dependence of the average value of the asymptotic period spacing (<Delta_P>_a) during the He-B phase on the size of the convective core. A first comparison with the inferred asymptotic period spacing for Kepler RC stars suggests the need for extra mixing also during this phase, as evinced from other observational facts.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-02-13T17:46:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "red giant",
      "testing convective-core overshooting",
      "dipole modes",
      "asymptotic period spacing",
      "relevant evolutionary phases"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/766/2/118",
      "journal": "The Astrophysical Journal",
      "year": 2013,
      "month": "Apr",
      "volume": 766,
      "number": 2,
      "pages": 118
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1219096,
      "adsabs": "2013ApJ...766..118M"
    }
  }
}