{
  "id": "1205.3732",
  "version": "v1",
  "published": "2012-05-16T16:41:06.000Z",
  "updated": "2012-05-16T16:41:06.000Z",
  "title": "Measuring the mass accretion rates of Herbig Ae/Be stars with X-shooter",
  "authors": [
    "M. A. Pogodin",
    "S. Hubrig",
    "R. V. Yudin",
    "M. Schoeller",
    "J. F. Gonzalez",
    "B. Stelzer"
  ],
  "comment": "19 pages, 13 figures, nine tables, accepted for publication in Astronomische Nachrichten",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We present the results of our observations of eight magnetic Herbig Ae/Be stars obtained with the X-shooter spectrograph mounted on UT2 at the VLT. X-shooter provides a simultaneous, medium-resolution and high-sensitivity spectrum over the entire wavelength range from 300 to 2500 nm. We estimate the mass accretion rates M_acc of the targets from 13 different spectral diagnostics using empiric calibrations derived previously for T Tauri-type stars and brown dwarfs. We have estimated the mass accretion rates of our targets, which range from 2x10^-9 to 2x10^-7 M_sun/yr. Furthermore, we have found accretion rate variability with amplitudes of 0.10-0.40 dex taking place on time scales from one day to tens of days. Additional future night-to-night observations need to be carried out to investigate the character of M_acc variability in details. Our study shows that the majority of the calibrational relations can be applied to Herbig Ae/Be stars, but several of them need to be re-calibrated on the basis of new spectral data for a larger number of Herbig Ae/Be stars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-05-16T16:41:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mass accretion rates",
      "magnetic herbig ae/be stars",
      "entire wavelength range",
      "accretion rate variability",
      "spectral diagnostics"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1002/asna.201211706",
      "journal": "Astronomische Nachrichten",
      "year": 2012,
      "month": "Aug",
      "volume": 333,
      "number": 7,
      "pages": 594
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1114949,
      "adsabs": "2012AN....333..594P"
    }
  }
}