LEADER 04077nam 22006615 450 001 9910254609303321 005 20220201174005.0 010 $a981-287-721-5 024 7 $a10.1007/978-981-287-721-5 035 $a(CKB)3710000000533072 035 $a(EBL)4188039 035 $a(SSID)ssj0001597481 035 $a(PQKBManifestationID)16297410 035 $a(PQKBTitleCode)TC0001597481 035 $a(PQKBWorkID)14885675 035 $a(PQKB)11132907 035 $a(DE-He213)978-981-287-721-5 035 $a(MiAaPQ)EBC4188039 035 $a(PPN)190886684 035 $a(EXLCZ)993710000000533072 100 $a20151207d2016 u| 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aX-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku /$fby Hirofumi Noda 205 $a1st ed. 2016. 210 1$aSingapore :$cSpringer Singapore :$cImprint: Springer,$d2016. 215 $a1 online resource (164 p.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 300 $a"Doctoral thesis accepted by the University of Tokyo, Tokyo, Japan." 311 1 $a981-287-720-7 320 $aIncludes bibliographical references at the end of each chapters. 327 $aReview -- Instrumentation -- Observation and Data Reduction -- Soft X-ray Analysis -- Hard X-ray Analysis -- Discussion and Conclusion. 330 $aThe aim of this research was to use the X-ray satellite Suzaku to establish a picture of a central engine that effectively converts the gravitational energy of accreting matter onto the supermassive black hole to a huge amount of radiation in an active galactic nucleus. Although the engine is known to consist of a Comptonizing corona and an accretion disk, its image has remained unclear because primary emissions, coming directly from the engine, cannot be identified in X-ray spectra without models. The book describes a technique of time variability assisted spectral decomposition to model-independently examine X-ray signals, and how this was applied to the Suzaku archive data of active galactic nuclei. As a result, at least three distinct primary X-ray components have been discovered in an X-ray from an active galactic nucleus, presumably indicating a novel picture that the engine is composed of multiple coronae with different physical properties in an accretion flow. Furthermore, the determination of the spectral shapes of the primary X-rays has a significant impact on estimations of black hole spins, because it is essential to quantify reprocessed X-ray spectra. The successful model-independent decomposition of X-ray spectral components with flux variations of active galactic nuclei is likely to be effective in future data analyses from the soon-to-be-launched Japanese X-ray satellite ASTRO-H, which is capable of achieving unprecedented fine spectros copy and broad energy band coverage. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aObservations, Astronomical 606 $aAstronomy$xObservations 606 $aPhysical measurements 606 $aMeasurement    606 $aAstronomy, Observations and Techniques$3https://scigraph.springernature.com/ontologies/product-market-codes/P22014 606 $aMeasurement Science and Instrumentation$3https://scigraph.springernature.com/ontologies/product-market-codes/P31040 615 0$aObservations, Astronomical. 615 0$aAstronomy$xObservations. 615 0$aPhysical measurements. 615 0$aMeasurement   . 615 14$aAstronomy, Observations and Techniques. 615 24$aMeasurement Science and Instrumentation. 676 $a523.112 700 $aNoda$b Hirofumi$4aut$4http://id.loc.gov/vocabulary/relators/aut$0816202 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910254609303321 996 $aX-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku$91821465 997 $aUNINA