Title
Suzaku Studies of White Dwarf Stars and the Galactic Xray Background Emission (Springer Theses),Used
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This thesis presents a study of the origin of an apparently extended Xray emission associated with the Galactic ridge. The study was carried out with broadband spectra obtained from mapping observations in the Galactic bulge region conducted in 20052010 by the Suzaku space Xray observatory. The spectra were analyzed with a newly constructed Xray spectral model of an accreting white dwarf binary that is one of the proposed candidate stars for the origin of the Galactic ridge emission in the higher energy band. Fitting of the observed Galactic ridge spectra with the model showed that there is another spectral component that fills the gap between the observed Xray flux and the component expected from the accreting white dwarf spectral model in the lower energy band. This additional soft spectral component was nicely explained by an Xray spectral model of normal stars. The result, together with previously reported highresolution imaging results, strongly supports the idea that the Galactic ridge Xray emission is an assembly of dim, discrete Xray point sources.
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This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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