{
  "id": "1401.1358",
  "version": "v1",
  "published": "2014-01-07T12:52:51.000Z",
  "updated": "2014-01-07T12:52:51.000Z",
  "title": "The post-common-envelope, binary central star of the planetary nebula Hen 2-11",
  "authors": [
    "David Jones",
    "Henri M. J. Boffin",
    "Brent Miszalski",
    "Roger Wesson",
    "Romano L. M. Corradi",
    "Amy A. Tyndall"
  ],
  "comment": "Accepted for publication in A&A. 9 pages, 5 figures, 4 tables",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present a detailed photometric study of the central star system of the planetary nebula Hen 2-11, selected for study because of its low-ionisation filaments and bipolar morphology - traits which have been strongly linked with central star binarity. Photometric monitoring with NTT-EFOSC2 reveals a highly irradiated, double-eclipsing, post-common-envelope system with a period of 0.609 d. Modelling of the lightcurve indicates that the nebular progenitor is extremely hot, while the secondary in the system is probably a K-type main sequence star. The chemical composition of the nebula is analysed, showing Hen 2-11 to be a medium-excitation non-Type I nebula. A simple photoionisation model is constructed determining abundance ratios of C/O and N/O which would be consistent with the common-envelope cutting short the AGB evolution of the nebular progenitor. The detection of a post-common-envelope binary system at the heart of Hen 2-11 further strengthens the link between binary progeny and the formation of axisymmetric planetary nebulae with patterns of low-ionisation filaments, clearly demonstrating their use as morphological indicators of central star binarity.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-01-07T12:52:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "planetary nebula hen",
      "binary central star",
      "central star binarity",
      "k-type main sequence star",
      "nebular progenitor"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/201322797",
      "journal": "Astronomy and Astrophysics",
      "year": 2014,
      "month": "Feb",
      "volume": 562
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1276368,
      "adsabs": "2014A&A...562A..89J"
    }
  }
}