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大学・研究所にある論文を検索できる 「Charge Exchange X-Ray Emission Detected in Multiple Shells of Supernova Remnant G296.1-0.5」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。
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Charge Exchange X-Ray Emission Detected in Multiple Shells of Supernova Remnant G296.1-0.5

Tanaka, Yukiko Uchida, Hiroyuki Tanaka, Takaaki Amano, Yuki Koshiba, Yosuke Go Tsuru, Takeshi Sano, Hidetoshi Fukui, Yasuo 京都大学 DOI:10.3847/1538-4357/ac738f

2022.07.01

概要

Recent high-resolution X-ray spectroscopy revealed the possible presence of charge exchange (CX) X-ray emission in supernova remnants (SNRs). Although CX is expected to take place at the outermost edges of SNR shells, no significant measurement has been reported so far due to the lack of nearby SNR samples. Here we present an X-ray study of SNR G296.1−0.5, which has a complicated multiple-shell structure, with the Reflection Grating Spectrometer on board XMM-Newton. We select two shells in different regions and find that in both regions the O vii line shows a high forbidden-to-resonance (f/r) ratio that cannot be reproduced by a simple thermal model. Our spectral analysis suggests a presence of CX and the result is also supported by our new radio observation, where we discover evidence of molecular clouds associated with these shells. Assuming G296.1−0.5 has a spherical shock, we estimate that CX is dominant in a thin layer with a thickness of 0.2%–0.3% of the shock radius. The result is consistent with a previous theoretical expectation and we therefore conclude that CX occurs in G296.1−0.5.

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