04077nam 22006615 450 991025460930332120220201174005.0981-287-721-510.1007/978-981-287-721-5(CKB)3710000000533072(EBL)4188039(SSID)ssj0001597481(PQKBManifestationID)16297410(PQKBTitleCode)TC0001597481(PQKBWorkID)14885675(PQKB)11132907(DE-He213)978-981-287-721-5(MiAaPQ)EBC4188039(PPN)190886684(EXLCZ)99371000000053307220151207d2016 u| 0engur|n|---|||||txtccrX-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku /by Hirofumi Noda1st ed. 2016.Singapore :Springer Singapore :Imprint: Springer,2016.1 online resource (164 p.)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053"Doctoral thesis accepted by the University of Tokyo, Tokyo, Japan."981-287-720-7 Includes bibliographical references at the end of each chapters.Review -- Instrumentation -- Observation and Data Reduction -- Soft X-ray Analysis -- Hard X-ray Analysis -- Discussion and Conclusion.The aim of this research was to use the X-ray satellite Suzaku to establish a picture of a central engine that effectively converts the gravitational energy of accreting matter onto the supermassive black hole to a huge amount of radiation in an active galactic nucleus. Although the engine is known to consist of a Comptonizing corona and an accretion disk, its image has remained unclear because primary emissions, coming directly from the engine, cannot be identified in X-ray spectra without models. The book describes a technique of time variability assisted spectral decomposition to model-independently examine X-ray signals, and how this was applied to the Suzaku archive data of active galactic nuclei. As a result, at least three distinct primary X-ray components have been discovered in an X-ray from an active galactic nucleus, presumably indicating a novel picture that the engine is composed of multiple coronae with different physical properties in an accretion flow. Furthermore, the determination of the spectral shapes of the primary X-rays has a significant impact on estimations of black hole spins, because it is essential to quantify reprocessed X-ray spectra. The successful model-independent decomposition of X-ray spectral components with flux variations of active galactic nuclei is likely to be effective in future data analyses from the soon-to-be-launched Japanese X-ray satellite ASTRO-H, which is capable of achieving unprecedented fine spectros copy and broad energy band coverage.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Observations, AstronomicalAstronomyObservationsPhysical 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.AstronomyObservations.Physical measurements.Measurement   .Astronomy, Observations and Techniques.Measurement Science and Instrumentation.523.112Noda Hirofumiauthttp://id.loc.gov/vocabulary/relators/aut816202MiAaPQMiAaPQMiAaPQBOOK9910254609303321X-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku1821465UNINA