In:
Publications of the Astronomical Society of Japan, Oxford University Press (OUP), Vol. 59, No. sp1 ( 2007-01-30), p. S237-S243
Abstract:
Sgr A East is a young SNR located in the Galactic Center (GC) region. Since the GC region is occupied by diffuse X-ray emission (GCDX) with a strong 6.7 keV line, an estimation of the GCDX is crucial to study the X-ray spectrum of Sgr A East. The flux and spectrum of the GCDX are found to be smoothly distributed around and across Sgr A East, and hence a reliable GCDX subtraction can be made. This paper presents the X-ray spectrum of Sgr A East with the XIS on board Suzaku. In addition to the previously reported $\mathrm{K}\alpha$ lines from S XV, Ar XVII, Ca XIX, and Fe XXV (all He-like atoms), we found $\mathrm{K}\alpha$ lines from S XVI, Ar XVIII, Fe XXVI (all hydrogenic atoms), and Ni XXVII (He-like), $\mathrm{K}\beta$ lines from S XV, Ar XVII, and Fe XXV, and a $\mathrm{K}\gamma$ line from Fe XXV. Plasma diagnostics using these lines revealed the presence of at least a two-temperature plasma. The overall spectrum can be fitted with a two-temperature ($\sim 1.2 \,\mathrm{keV}$ and $\sim 6 \,\mathrm{keV}$) plasma in ionization equilibrium plus a power-law component.
Type of Medium:
Online Resource
ISSN:
2053-051X
,
0004-6264
DOI:
10.1093/pasj/59.sp1.S237
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2007
detail.hit.zdb_id:
2206640-8
detail.hit.zdb_id:
2083084-1
SSG:
16,12
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