{
  "id": "1902.02713",
  "version": "v1",
  "published": "2019-02-07T16:20:28.000Z",
  "updated": "2019-02-07T16:20:28.000Z",
  "title": "The Magnetic Early B-type Stars II: stellar atmospheric parameters in the era of Gaia",
  "authors": [
    "M. E. Shultz",
    "G. A. Wade",
    "Th. Rivinius",
    "E. Alecian",
    "C. Neiner",
    "V. Petit",
    "J. P. Wisniewski",
    "the MiMeS",
    "BinaMIcS Collaborations"
  ],
  "comment": "21 pages, 3 tables, 15 figures, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Atmospheric parameters determined via spectral modelling are unavailable for many of the known magnetic early B-type stars. We utilized high-resolution spectra together with NLTE models to measure effective temperatures $T_{\\rm eff}$ and surface gravities $\\log{g}$ of stars for which these measurements are not yet available. We find good agreement between our $T_{\\rm eff}$ measurements and previous results obtained both photometrically and spectroscopically. For $\\log{g}$, our results are compatible with previous spectroscopic measurements; however, surface gravities of stars previously determined photometrically have been substantially revised. We furthermore find that $\\log{g}$ measurements obtained with HARPSpol are typically about 0.1 dex lower than those from comparable instruments. Luminosities were determined using Gaia Data Release 2 parallaxes. We find Gaia parallaxes to be unreliable for bright stars ($V<6$ mag) and for binaries; in these cases we reverted to Hipparcos parallaxes. In general we find luminosities systematically lower than those previously reported. Comparison of $\\log{g}$ and $\\log{L}$ to available rotational and magnetic measurements shows no correlation between either parameter with magnetic data, but a clear slow-down in rotation with both decreasing $\\log{g}$ and increasing $\\log{L}$, a result compatible with the expectation that magnetic braking should lead to rapid magnetic spindown that accelerates with increasing mass-loss.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-02-07T16:20:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic early b-type stars",
      "stellar atmospheric parameters",
      "measurements",
      "surface gravities",
      "parallaxes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}