A systematic comparison of ionization temperatures between ionizing and recombining plasmas in supernova remnants

A systematic comparison of ionization temperatures between ionizing and recombining plasmas in supernova remnants
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超新星遗迹中电离和重组等离子体之间的电离温度的系统比较

DOI:
10.1093/pasj/psab033
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发表时间:
2021
影响因子:
2.3
通讯作者:
Katsuji
Katsuji
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Yamauchi;Shigeo; Nobukawa;Masayoshi; Koyama;Katsuji

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超新星遗迹(SNRs)中等离子体的温度在激波加热后最初非常低。库仑作用使电子温度(kTe)迅速升高,高能电子逐渐与原子碰撞,使电离温度(kTi)升高。观测结果表明,在激波加热后,大多数年轻人和中老年人的信噪比k_T低于T。这种电离等离子体(IP)的情况下解释了壳状信噪比的温度演化。另一方面,在过去的十年中,一个显着的比例的混合形态的信噪比被发现表现出一个重组等离子体(RP)与higherkTithankTe。RP-SNRs的起源和演化机制一直是个谜。为了解决这个难题,本文介绍了使用后续朱雀观测的TeenskandkTi配置文件,然后提出了一个新的方案,IP和RP SNR的温度和形态演变。
The temperatures of the plasma in supernova remnants (SNRs) are initially very low just after the shock heating. The electron temperature (kTe) increases quickly by Coulomb interaction, and then the energetic electrons gradually ionize atoms to increase the ionization temperature (kTi). The observational fact is that most young and middle-to-old SNRs have lowerkTithankTeafter the shock heating. The temperature evolution in shell-like SNRs has been explained by this ionizing plasma (IP) scenario. On the other hand, in the last decade, a significant fraction of mixed-morphology SNRs was found to exhibit a recombining plasma (RP) with higherkTithankTe. The origin and the evolution mechanism of RP SNRs have been puzzling. To address this puzzle, this paper presentskTeandkTiprofiles using follow-up Suzaku observations, and then proposes a new scenario for the temperature and morphology evolution in IP and RP SNRs.
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