{
  "id": "1712.03368",
  "version": "v1",
  "published": "2017-12-09T10:03:32.000Z",
  "updated": "2017-12-09T10:03:32.000Z",
  "title": "Atomic diffusion in the atmosphere of Feige 86",
  "authors": [
    "Peter Nemeth"
  ],
  "comment": "5 pages, 4 figures, accepted for publication in Open Astronomy as part of the conference proceedings for the Eighth Meeting on Hot Subdwarf Stars and Related Objects (sdOB8, Krakow)",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We have revisited the ultraviolet and optical spectra of the blue horizontal branch star Feige 86. The new analysis finds the star cooler and more compact than previously determined. The IUE spectrum of Feige 86 holds numerous unidentified spectral lines of heavy metals, indicating efficient atomic diffusion in the atmosphere. Because diffusion plays a key role in the atmospheres of hot subdwarfs as well, it is indispensable to a better understanding of subdwarf pulsations and evolution. Feige 86 looks like an ideal target to confront diffusion theory with observations and test spectroscopic techniques. Therefore, to advance our general understanding of diffusion in stellar atmospheres we urge for new ultraviolet spectroscopy of Feige 86 at the highest possible resolution with HST/STIS.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-12-09T10:03:32.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "atmosphere",
      "blue horizontal branch star feige",
      "test spectroscopic techniques",
      "holds numerous unidentified spectral lines",
      "indicating efficient atomic diffusion"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}