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

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arxiv 1902.08386 v1 pith:XSWYVF3D submitted 2019-02-22 astro-ph.HE

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

classification astro-ph.HE
keywords eastalphagcxeresultsx-raycentergalacticline
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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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