{
  "id": "astro-ph/0409246",
  "version": "v1",
  "published": "2004-09-10T12:48:42.000Z",
  "updated": "2004-09-10T12:48:42.000Z",
  "title": "Differential rotation of main sequence F stars",
  "authors": [
    "M. Kueker",
    "G. Ruediger"
  ],
  "comment": "7 pages, 10 figures",
  "doi": "10.1051/0004-6361:20041987",
  "categories": [
    "astro-ph"
  ],
  "abstract": "The differential rotation of a 1.2 $M_\\odot$ zero age MS star (spectral type F8) is computed and the results are compared with those from a similar model of the Sun. The rotation pattern is determined by solving the Reynolds equation including the convective energy transport. The latter is anisotropic due to the Coriolis force causing a horizontal temperature gradient of ~ 7 K between the poles and the equator. Comparison of the transport mechanisms of angular momentum (the eddy viscosity, the $\\Lambda$-effect and the meridional flow) shows that for the F star the $\\Lambda$-effect is the most powerful transporter for rotation periods of 7 d or less. In the limit of very fast rotation the $\\Lambda$-effect is balanced by the meridional flow alone and the rotation is nearly rigid. The rotation pattern found for the F star is very similar to the solar rotation law, but the horizontal shear is about twice the solar value. As a function of the rotation period, the total equator-pole difference of the angular velocity has a (slight) maximum at a period of 7 d and (slowly) vanishes in both the limiting cases of very fast and very slow rotation. A comparison of the solar models with those for the F-type star shows a much stronger dependence of the differential surface rotation on the stellar luminosity rather than on the rotation rate.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-09-10T12:48:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "differential rotation",
      "main sequence",
      "zero age ms star",
      "meridional flow",
      "rotation period"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 658832
    }
  }
}