X-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku

Hirofumi Noda (Autor)

Buch | Softcover

153 Seiten

2018 | Softcover reprint of the original 1st ed. 2016
Springer Verlag, Singapore
978-981-13-5708-4 (ISBN)

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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.

Dr. Hirofumi Noda Department of Astronomy, The University of Tokyo

Review.- Instrumentation.- Observation and Data Reduction.- Soft X-ray Analysis.- Hard X-ray Analysis.- Discussion and Conclusion.

Erscheint lt. Verlag	9.12.2018
Reihe/Serie	Springer Theses
Zusatzinfo	33 Illustrations, color; 62 Illustrations, black and white; XV, 153 p. 95 illus., 33 illus. in color.
Verlagsort	Singapore
Sprache	englisch
Maße	155 x 235 mm
Themenwelt	Naturwissenschaften ► Physik / Astronomie ► Astronomie / Astrophysik
Schlagworte	active galactic nuclei • ASTRO-H • Decomposition of X-ray spectral components • Supermassive Black Hole • Suzaku • x-ray astrophysics
ISBN-10	981-13-5708-0 / 9811357080
ISBN-13	978-981-13-5708-4 / 9789811357084
Zustand	Neuware