The electron temperature distribution and the high ionization just behind the shock in the Cygnus Loop Article Swipe
Masahiro Ichihashi
,
Aya Bamba
,
Dai Tateishi
,
Kouichi Hagino
,
Satoru Katsuda
,
Hiroyuki Uchida
,
Hiromasa Suzuki
,
Ryo Yamazaki
,
Yutaka Ohira
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2509.10346
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2509.10346
The physical processes behind astrophysical collisionless shocks, such as thermal relaxation and ionization after shock passage, remain poorly understood. To investigate these processes, we analyze the northeastern region of the Cygnus Loop with XMM-Newton. The electron temperature is found to increase towards the interior of the remnant ranging from 0.15-0.19 keV energy range within a spatial scale of 6 arcmin (or 1.27 pc at a distance of 725 pc) from the shock front. This can be explained well by a modified Sedov solution with radiative cooling. We also show that the ionization timescales determined from our spectroscopy are significantly larger than those estimated based on the electron density of the surrounding materials and the shock velocity. This excess can be qualitatively explained by a mixing of inner multiple plasma components with different ionization states due to turbulence.
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- preprint
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- en
- Landing Page
- http://arxiv.org/abs/2509.10346
- https://arxiv.org/pdf/2509.10346
- OA Status
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- https://openalex.org/W4414596453
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- DOI
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The electron temperature distribution and the high ionization just behind the shock in the Cygnus LoopWork title
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preprintOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-09-12Full publication date if available
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Masahiro Ichihashi, Aya Bamba, Dai Tateishi, Kouichi Hagino, Satoru Katsuda, Hiroyuki Uchida, Hiromasa Suzuki, Ryo Yamazaki, Yutaka OhiraList of authors in order
- Landing page
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https://arxiv.org/abs/2509.10346Publisher landing page
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https://arxiv.org/pdf/2509.10346Direct link to full text PDF
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YesWhether a free full text is available
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https://arxiv.org/pdf/2509.10346Direct OA link when available
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0Total citation count in OpenAlex
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