X-ray spectra of Sagittarius A East and diffuse X-ray background near the Galactic center

PASJ: Publications of the Astronomical Society of Japan

Koyama, Katsuji¹  Yamauchi, Shigeo²  Ono, Akiko²  Nobukawa, Kumiko K²  Nobukawa, Masayoshi³  Uchiyama, Hideki⁴ 

[1] Department of Physics, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan;Department of Physics, Nara Women’s University, Kitauoyanishimachi, Nara, Nara 630-8506, Japan;Faculty of Education, Nara University of Education, Takabatake-cho, Nara, Nara 630-8528, Japan;Faculty of Education, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, Shizuoka 422-8529, Japan

关键词: ISM: supernova remnants;    X-rays: diffuse background;    X-rays: ISM;    Galaxy: center;   

DOI  :  10.1093/pasj/psz025

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

This paper reports the analysis procedure and results of simultaneous spectral fits of the Suzaku archive data for Sagittarius (Sgr) A East and the nearby Galactic center X-ray emission (GCXE). The results are that the mixed-morphology supernova remnant Sgr A East has a recombining plasma (RP) with Cr and Mn Heα lines, and a power-law component (PL) with an Fe i Kα line. The nearby GCXE has a ∼1.5-times larger surface brightness than the mean GCXE far from Sgr A East, although the spectral shape is almost identical. Based on these results, we interpret that the origins of the RP and the PL with the Fe i Kα line are past big flares of Sgr A⋆.

【 授权许可】

CC BY