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arXiv · 1402.1633

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
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Abstract

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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Fumiyoshi Kamitsukasa, Katsuji Koyama, Hiroshi Tsunemi, Kiyoshi Hayashida, Hiroshi Nakajima, Hiroaki Takahashi, Shutaro Ueda, Koji Mori, Satoru Katsuda, Hiroyuki Uchida. 2014-02-07. Suzaku Discovery of Fe K-Shell Line from the O-Rich SNR G292.0+1.8. https://doi.org/10.1093/pasj%2Fpsu035

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