X-ray emission from comets, cometary knots, and supernova remnants

Bingham, R. and Kellett, B. J. and Dawson, J. M. and Shapiro, V. D. and Mendis, D. A. (2000) X-ray emission from comets, cometary knots, and supernova remnants. Astrophysical Journal Supplement, 127 (2). pp. 233-237. ISSN 0067-0049

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    Abstract

    A comparison is made between one of the processes leading to cometary X-ray emission and X-rays from supernova remnants. We demonstrate that the X-ray emission in both comet and supernova is bremsstrahlung and line radiation created by energetic electrons accelerated by plasma turbulence. We further demonstrate that the most likely source of plasma turbulence is produced by counterstreaming ion populations which result from the mass loading effect or from an anisotropic distribution produced by reflecting ions from a collisionless shock. The instability that gives rise to the plasma turbulence is the modified two-stream instability of counterstreaming ions. A similar instability arises in laser-plasma interactions that have self-generating magnetic fields and flowing ions.

    Creators(s): Bingham, R. ORCID logoORCID: https://orcid.org/0000-0002-9843-7635, Kellett, B. J., Dawson, J. M., Shapiro, V. D. and Mendis, D. A.;
    Item type:Article
    ID code:63976
    Notes:(c) American Astronomical Society
    Keywords:emission, cometary knots, comets, supernova, radiation mechanisms, supernova remnants, turbulence, X-rays, Plasma physics. Ionized gases, Astronomy and Astrophysics, Space and Planetary Science
    Subjects:Science > Physics > Plasma physics. Ionized gases
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:09 May 2018 13:50
    Last modified:27 Jan 2021 09:00
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/63976
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