2018年6月21日
Vortical Amplification of the Magnetic Field at an Inward Shock of Supernova Remnant Cassiopeia A
Physical Review Letters
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- 巻
- 120
- 号
- 25
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.120.251101
- 出版者・発行元
- American Physical Society
We present an interpretation of the time variability of the x-ray flux recently reported from a multiepoch campaign of 15 years of observations of the supernova remnant Cassiopeia A by Chandra. We show for the first time quantitatively that the [4.2-6] keV nonthermal flux increase up to 50% traces the growth of the magnetic field due to a vortical amplification mechanism at a reflection inward shock colliding with inner overdensities. The fast synchrotron cooling as compared with shock-acceleration time scale qualitatively supports the flux decrease.
- ID情報
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- DOI : 10.1103/PhysRevLett.120.251101
- ISSN : 1079-7114
- ISSN : 0031-9007
- SCOPUS ID : 85048982633