{
  "id": "1801.04743",
  "version": "v1",
  "published": "2018-01-15T11:28:30.000Z",
  "updated": "2018-01-15T11:28:30.000Z",
  "title": "Spatially inhomogeneous acceleration of electrons in solar flares",
  "authors": [
    "Duncan J. Stackhouse",
    "Eduard P. Kontar"
  ],
  "comment": "10 pages, submitted to Astronomy and Astrophysics Journal",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE",
    "physics.plasm-ph",
    "physics.space-ph"
  ],
  "abstract": "The imaging spectroscopy capabilities of the Reuven Ramaty high energy solar spectroscopic imager (RHESSI) enable the examination of the accelerated electron distribution throughout a solar flare region. In particular, it has been revealed that the energisation of these particles takes place over a region of finite size, sometimes resolved by RHESSI observations. In this paper, we present, for the first time, a spatially distributed acceleration model and investigate the role of inhomogeneous acceleration on the observed X-ray emission properties. We have modelled transport explicitly examining scatter-free and diffusive transport within the acceleration region and compare with the analytic leaky-box solution. The results show the importance of including this spatial variation when modelling electron acceleration in solar flares. The presence of an inhomogeneous, extended acceleration region produces a spectral index that is, in most cases, different from the simple leaky-box prediction. In particular, it results in a generally softer spectral index than predicted by the leaky-box solution, for both scatter-free and diffusive transport, and thus should be taken into account when modelling stochastic acceleration in solar flares.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-01-15T11:28:30.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "solar flare",
      "spatially inhomogeneous acceleration",
      "transport explicitly examining scatter-free",
      "high energy solar spectroscopic imager",
      "reuven ramaty high energy solar"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}