{
  "id": "1102.1896",
  "version": "v3",
  "published": "2011-02-09T16:22:56.000Z",
  "updated": "2011-11-28T20:18:00.000Z",
  "title": "Amplitudes and lifetimes of solar-like oscillations observed by CoRoT* Red-giant versus main-sequence stars",
  "authors": [
    "F. Baudin",
    "C. Barban",
    "K. Belkacem",
    "S. Hekker",
    "T. Morel",
    "R. Samadi",
    "O. Benomar",
    "M. -J. Goupil",
    "F. Carrier",
    "J. Ballot",
    "S. Deheuvels",
    "J. De Ridder",
    "A. P. Hatzes",
    "T. Kallinger",
    "W. W. Weiss"
  ],
  "comment": "Accepted in A&A on 2011 February 8th, now includes corrections (results now more precise on \\Gamma and A_max in Section 4.3 and 4.4, fig. 7 corrected consequently)",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Context. The advent of space-borne missions such as CoRoT or Kepler providing photometric data has brought new possibilities for asteroseismology across the H-R diagram. Solar-like oscillations are now observed in many stars, including red giants and main- sequence stars. Aims. Based on several hundred identified pulsating red giants, we aim to characterize their oscillation amplitudes and widths. These observables are compared with those of main-sequence stars in order to test trends and scaling laws for these parameters for both main-sequence stars and red giants. Methods. An automated fitting procedure is used to analyze several hundred Fourier spectra. For each star, a modeled spectrum is fitted to the observed oscillation spectrum, and mode parameters are derived. Results. Amplitudes and widths of red-giant solar-like oscillations are estimated for several hundred modes of oscillation. Amplitudes are relatively high (several hundred ppm) and widths relatively small (very few tenths of a {\\mu}Hz). Conclusions. Widths measured in main-sequence stars show a different variation with the effective temperature than red giants. A single scaling law is derived for mode amplitudes of both red giants and main-sequence stars versus their luminosity to mass ratio. However, our results suggest that two regimes may also be compatible with the observations.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2011-11-28T20:18:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "main-sequence stars",
      "solar-like oscillations",
      "red giants",
      "amplitudes",
      "scaling law"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/201014037",
      "journal": "Astronomy and Astrophysics",
      "year": 2011,
      "month": "May",
      "volume": 529
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 889031,
      "adsabs": "2011A&A...529A..84B"
    }
  }
}