X-ray Observations of Supernova Remnants - environment study of acceleration sites
Abstract
X-ray observations are one of the strong tools to study acceleration sites of cosmic rays, not only with synchrotron emission but also with thermal emission from heated plasma. Thermal X-rays with emission lines give us plenty of information on temperature, density, plasma time scale and so on, for heated interstellar medium and ejecta of progenitors, which are critical to understand the background plasma of the acceleration sites. It is debated for long time about which environment strongly accelerate particles, thin environment with faster shocks or thick environment with amplified magnetic field. It is also important tp known in which environment and when accelerated particles can escape to be cosmic rays, which is totally open issue to be solved. Observations of low energy cosmic rays in the MeV range is also crucial to understand the injection of accelerated particles. In this paper, we will show recent results with X-ray observations, as hints of environments of acceleration and escape sites on shocks of supernova remnants.
- Publication:
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Nuclear and Particle Physics Proceedings
- Pub Date:
- April 2018
- DOI:
- 10.1016/j.nuclphysbps.2018.07.024
- Bibcode:
- 2018NPPP..297..158B
- Keywords:
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- X-rays;
- Gamma-rays;
- supernova remnants;
- diffusive shock acceleration