X-ray spectra of Sgr A East and diffuse X-ray background near the Galactic center. (arXiv:1902.08386v1 [astro-ph.HE])

X-ray spectra of Sgr A East and diffuse X-ray background near the Galactic center. (arXiv:1902.08386v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Ono_A/0/1/0/all/0/1">Akiko Ono</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Uchiyama_H/0/1/0/all/0/1">Hideki Uchiyama</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yamauchi_S/0/1/0/all/0/1">Shigeo Yamauchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nobukawa_M/0/1/0/all/0/1">Masayoshi Nobukawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nobukawa_K/0/1/0/all/0/1">Kumiko K. Nobukawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Koyama_K/0/1/0/all/0/1">Katsuji Koyama</a>

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 He$alpha$ lines, and a power-law component (PL) with an Fe I
K$alpha$ line. The nearby GCXE has a $sim$1.5-times larger surface brightness
than the mean GCXE far from Sgr A East, although the spectral shape is almost
identical. Based on these results, we interpret that the origins of the RP and
the PL with the Fe I K$alpha$ line are past big flares of Sgr A$^*$.

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