{
  "id": "1806.00769",
  "version": "v1",
  "published": "2018-06-03T11:11:49.000Z",
  "updated": "2018-06-03T11:11:49.000Z",
  "title": "Periodicity in the Light Curve of P Cygni - Indication for a Binary Companion?",
  "authors": [
    "Amir M. Michaelis",
    "Amit Kashi",
    "Nino Kochiashvili"
  ],
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We use observations of the Luminous Blue Variable (LBV) P Cygni spanning seven decades, along with signal processing methods, to identify a periodicity in the stellar luminosity. We find a distinct period of 4.7$\\pm$0.3 years together with shorter periods. The periodicity is a possible indication of a binary companion passing in an eclipse-like event from the dense LBV wind, and if so it is the first observational indication that P Cygni is a binary system. This may support models that contribute giant LBV eruptions to interaction with a binary companion. We discuss other interpretations for the periodicity as well.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-03T11:11:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "binary companion",
      "light curve",
      "periodicity",
      "contribute giant lbv eruptions",
      "dense lbv wind"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}