{
  "id": "1003.5802",
  "version": "v1",
  "published": "2010-03-30T12:25:28.000Z",
  "updated": "2010-03-30T12:25:28.000Z",
  "title": "Coronal properties of planet-bearing stars",
  "authors": [
    "K. Poppenhaeger",
    "J. Robrade",
    "J. H. M. M. Schmitt"
  ],
  "comment": "accepted by A&A",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Do extrasolar planets affect the activity of their host stars? Indications for chromospheric activity enhancement have been found for a handful of targets, but in the X-ray regime, conclusive observational evidence is still missing. We want to establish a sound observational basis to confirm or reject major effects of Star-Planet Interactions (SPI) in stellar X-ray emissions. We therefore conduct a statistical analysis of stellar X-ray activity of all known planet-bearing stars within 30pc distance for dependencies on planetary parameters such as mass and semimajor axis. We find that in our sample, there are no significant correlations of X-ray luminosity or the activity indicator L_X/L_bol with planetary parameters which cannot be explained by selection effects. Coronal SPI seems to be a phenomenon which might only manifest itself as a strong effect for a few individual targets, but not to have a major effect on planet-bearing stars in general.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-03-30T12:25:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "planet-bearing stars",
      "coronal properties",
      "planetary parameters",
      "stellar x-ray emissions",
      "chromospheric activity enhancement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/201014245",
      "journal": "Astronomy and Astrophysics",
      "year": 2010,
      "month": "Jun",
      "volume": 515
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 850652,
      "adsabs": "2010A&A...515A..98P"
    }
  }
}