03803nam 22006615 450 991043797870332120200706151937.01-299-19801-54-431-54219-110.1007/978-4-431-54219-3(CKB)2670000000328419(EBL)1083421(OCoLC)826853750(SSID)ssj0000854868(PQKBManifestationID)11450885(PQKBTitleCode)TC0000854868(PQKBWorkID)10911488(PQKB)10220046(DE-He213)978-4-431-54219-3(MiAaPQ)EBC1083421(PPN)168332612(EXLCZ)99267000000032841920130125d2013 u| 0engur|n|---|||||txtccrSuzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission[electronic resource] /by Takayuki Yuasa1st ed. 2013.Tokyo :Springer Japan :Imprint: Springer,2013.1 online resource (162 p.)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Description based upon print version of record.4-431-54717-7 4-431-54218-3 Includes bibliographical references.Review of the Galactic X-ray Background Emission and White Dwarf Binaries -- Constructing an X-ray Model of Accreting White Dwarf Binaries -- Instrumentation -- Estimating the Masses of White Dwarfs in Magnetic Cataclysmic Variables -- Decomposing the Galactic Ridge X-ray Emission.This thesis presents a study of the origin of an apparently extended X-ray 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 2005–2010 by the Suzaku space X-ray observatory. The spectra were analyzed with a newly constructed X-ray 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 X-ray 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 X-ray spectral model of normal stars. The result, together with previously reported high-resolution imaging results, strongly supports the idea that the Galactic ridge X-ray emission is an assembly of dim, discrete X-ray point sources.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Observations, AstronomicalAstronomy—ObservationsPhysical measurementsMeasurement   Astronomy, Observations and Techniqueshttps://scigraph.springernature.com/ontologies/product-market-codes/P22014Measurement Science and Instrumentationhttps://scigraph.springernature.com/ontologies/product-market-codes/P31040Observations, Astronomical.Astronomy—Observations.Physical measurements.Measurement   .Astronomy, Observations and Techniques.Measurement Science and Instrumentation.523.887Yuasa Takayukiauthttp://id.loc.gov/vocabulary/relators/aut871949BOOK9910437978703321Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission1946819UNINA