{
  "id": "2010.02545",
  "version": "v1",
  "published": "2020-10-06T08:24:04.000Z",
  "updated": "2020-10-06T08:24:04.000Z",
  "title": "Rapid evolution of [WC] stars in the Magellanic Clouds",
  "authors": [
    "Marcin Hajduk"
  ],
  "comment": "11 pages, 2 figures",
  "journal": "2020, A&A, 642, A71",
  "doi": "10.1051/0004-6361/202038049",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA"
  ],
  "abstract": "We obtained new spectra of fourteen Magellanic Cloud planetary nebulae with the South African Large Telescope to determine heating rates of their central stars and to verify evolutionary models of post-asymptotic giant branch stars. We compared new spectra with observations made in previous years. Five planetary nebulae showed an increase in excitation over time. Four of their central stars exhibit [WC] features in their spectra, including three new detections. This raises the total number of [WC] central stars of PNe in the Magellanic Clouds to ten. We compared determined heating rates of the four [WC] central stars with the He-burning post-asymptotic giant branch evolutionary tracks and the remaining star with the H-burning tracks. Determined heating rates are consistent with the evolutionary models for both H and He-burning post-asymptotic giant branch stars. The central stars of the PNe that show the fastest increase of excitation are also the most luminous in the sample. This indicates that [WC] central stars in the Magellanic Clouds evolve faster than H-burning central stars, and they originate from more massive progenitors.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-10-06T08:24:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "central stars",
      "post-asymptotic giant branch stars",
      "giant branch evolutionary tracks",
      "magellanic cloud planetary nebulae",
      "rapid evolution"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}