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arXiv 1402.1633astro-ph.HE
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富氧SNR G292 .0+1.8中Fe K壳线的发现

Suzaku Discovery of Fe K-Shell Line from the O-Rich SNR G292.0+1.8

Fumiyoshi Kamitsukasa, Katsuji Koyama, Hiroshi Tsunemi, Kiyoshi Hayashida, Hiroshi Nakajima, Hiroaki Takahashi, Shutaro Ueda, Koji Mori, Satoru Katsuda, Hiroyuki Uchida

摘要:

我们报告了银河系富氧超新星遗迹(SNR)G292.0+1.8的朱雀/XIS结果,G292.0+1.8是核心坍缩超新星的遗迹。G292.0+1.8的X射线谱由两种类型的等离子体组成,一种是处于碰撞电离平衡(CIE),另一种是处于非平衡电离(NEI)。CIE等离子体具有接近太阳的丰度,因此可能起源于星周和星际介质。NEI等离子体具有超太阳的丰度,丰度模式表明等离子体起源于主序为30-35 Msolar的超新星喷出物。在NEI等离子体中首次探测到能量为6.6keV的铁K壳层线。

英文摘要:

We report the Suzaku/XIS results of the Galactic oxygen-rich supernova remnant (SNR), G292.0+1.8, a remnant of a core-collapse supernova. The X-ray spectrum of G292.0+1.8 consists of two type plasmas, one is in collisional ionization equilibrium (CIE) and the other is in non-equilibrium ionization (NEI). The CIE plasma has nearly solar abundances, and hence would be originated from the circumstellar and interstellar mediums. The NEI plasma has super-solar abundances, and the abundance pattern indicates that the plasma originates from the supernova ejecta with a main sequence of 30-35 Msolar. Iron K-shell line at energy of 6.6 keV is detected for the first time in the NEI plasma.

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