{
  "id": "1902.10833",
  "version": "v1",
  "published": "2019-02-27T23:40:18.000Z",
  "updated": "2019-02-27T23:40:18.000Z",
  "title": "Combining timing characteristics with physical broadband spectral modelling of black hole X-ray binary GX~339$-$4",
  "authors": [
    "Riley M. T. Connors",
    "David van Eijnatten",
    "Sera Markoff",
    "Chiara Ceccobello",
    "Victoria Grinberg",
    "Lucy Heil",
    "Dimitris Kantzas",
    "Matteo Lucchini",
    "Patrick Crumley"
  ],
  "comment": "Accepted for publication in MNRAS, 20 pages, 16 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "GX~339$-$4 is a black hole X-ray binary that is a key focus of accretion studies since it goes into outburst roughly every two-to-three years. Tracking of its radio, IR and X-ray flux during multiple outbursts reveals tight broadband correlations. The radio emission originates in a compact, self-absorbed jet, however the origin of the X-ray emission is still debated: jet base or corona? We fit 20 quasi-simultaneous radio, IR, optical and X-ray observations of GX~339$-$4 covering three separate outbursts in 2005, 2007, 2010--2011, with a composite corona + jet model, where inverse Compton emission from both regions contributes to the X-ray emission. Using a recently-proposed identifier of the X-ray variability properties known as power-spectral hue, we attempt to explain both the spectral and evolving timing characteristics, with the model. We find the X-ray spectra are best fit by inverse Compton scattering in a dominant hot corona ($kT_{\\rm e}\\sim$ hundreds of keV). However, radio and IR-optical constraints imply a non-negligible contribution from inverse Compton scattering off hotter electrons ($kT_{\\rm e} \\ge 511$~keV) in the base of the jets, ranging from a few up to $\\sim50$\\% of the integrated 3--100~keV flux. We also find that the physical properties of the jet show interesting correlations with the shape of the broadband X-ray variability of the source, posing intriguing suggestions for the connection between the jet and corona.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-02-27T23:40:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole x-ray binary",
      "physical broadband spectral modelling",
      "combining timing characteristics",
      "inverse compton"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}