Probing Cosmic Rays with Fe K$\alpha$ Line Structures Generated by Multiple Ionization Process.

  title={Probing Cosmic Rays with Fe K\$\alpha\$ Line Structures Generated by Multiple Ionization Process.},
  author={Hiromichi Okon and Makoto Imai and Takaaki Tanaka and Hiroyuki Uchida and Takeshi Go Tsuru},
  journal={arXiv: High Energy Astrophysical Phenomena},
  • Hiromichi Okon, Makoto Imai, +2 authors Takeshi Go Tsuru
  • Published 2020
  • Physics
  • arXiv: High Energy Astrophysical Phenomena
  • Supernova remnants (SNRs) have been regarded as major acceleration sites of Galactic cosmic rays. Recent X-ray studies revealed neutral Fe K$\alpha$ line emission from dense gas in the vicinity of some SNRs, which can be best interpreted as K-shell ionization of Fe atoms in the gas by sub-relativistic particles accelerated in the SNRs. In this Letter, we propose a novel method of constraining the composition of particles accelerated in SNRs, which is currently unknown. When energetic heavy ions… CONTINUE READING

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