X-Ray Observations of the Galactic Center with Suzaku
K. Koyama, Y. Hyodo, T. Inui, M. Nobukawa, H. Mori (Kyoto, University)
TL;DR
This paper presents detailed Suzaku X-ray observations of the Galactic center, revealing the origins of various emission lines, identifying new supernova remnant candidates, and observing time variability in specific regions.
Contribution
It provides new insights into the origin of X-ray emission lines, identifies potential new supernova remnants, and reports on temporal changes in X-ray fluorescence in the Galactic center.
Findings
Origin of 6.7/7.0 keV lines is collisional excitation in hot plasma
New SNR and super-bubble candidates identified
Most 6.4 keV line is fluorescence by X-rays and shows time variability
Abstract
We report on the diffuse X-ray emissions from the Galactic center (GCDX) observed with the X-ray Imaging Spectrometer (XIS) on board the Suzaku satellite. The highly accurate energy calibrations and extremely low background of the XIS provide many new facts on the GCDX. These are (1) the origin of the 6.7/7.0keV lines is collisional excitation in hot plasma, (2) new SNR and super-bubble candidates are found, (3) most of the 6.4keV line is fluorescence by X-rays, and (4) time variability of the 6.4keV line is found from the SgrB2 complex.
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