{
  "id": "1409.2684",
  "version": "v1",
  "published": "2014-09-09T11:16:18.000Z",
  "updated": "2014-09-09T11:16:18.000Z",
  "title": "A multi-wavelength view on the dusty Wolf-Rayet star WR 48a",
  "authors": [
    "Svetozar A. Zhekov",
    "Toma Tomov",
    "Marcin P. Gawronski",
    "Leonid N. Georgiev",
    "Jura Borissova",
    "Radostin Kurtev",
    "Marc Gagne",
    "Marcin Hajduk"
  ],
  "comment": "Accepted for publication in MNRAS; 16 pages, 16 figures, 6 tables",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present results from the first attempts to derive various physical characteristics of the dusty Wolf-Rayet star WR 48a based on a multi-wavelength view of its observational properties. This is done on the basis of new optical and near-infrared spectral observations and on data from various archives in the optical, radio and X-rays. The optical spectrum of WR 48a is acceptably well represented by a sum of two spectra: of a WR star of the WC8 type and of a WR star of the WN8h type. The strength of the interstellar absorption features in the optical spectra of WR 48a and the near-by stars D2-3 and D2-7 (both members of the open cluster Danks 2) indicates that WR 48a is located at a distance of ~4 kpc from us. WR 48a is very likely a thermal radio source and for such a case and smooth (no clumps) wind its radio emission suggests a relatively high mass-loss rate of this dusty WR star (dM/dt = a few x 10^(-4) solar masses per year). Long timescale (years) variability of WR 48a is established in the optical, radio and X-rays. Colliding stellar winds likely play a very important role in the physics of this object. However, some LBV-like (luminous blue variable) activity could not be excluded as well.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-09-09T11:16:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "dusty wolf-rayet star wr 48a",
      "multi-wavelength view",
      "wr star",
      "optical spectrum",
      "interstellar absorption features"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnras/stu1880",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2014,
      "month": "Dec",
      "volume": 445,
      "number": 2,
      "pages": 1663
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014MNRAS.445.1663Z"
    }
  }
}