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X-ray studies of the central engine ...

Noda, Hirofumi.

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X-ray studies of the central engine in active galactic nuclei with Suzaku

Record Type:	Electronic resources : Monograph/item
Title/Author:	X-ray studies of the central engine in active galactic nuclei with Suzaku/ by Hirofumi Noda.
Author:	Noda, Hirofumi.
Published:	Singapore :Springer Singapore : : 2016.,
Description:	xv, 153 p. :ill., digital ;24 cm.
[NT 15003449]:	Review -- Instrumentation -- Observation and Data Reduction -- Soft X-ray Analysis -- Hard X-ray Analysis -- Discussion and Conclusion.
Contained By:	Springer eBooks
Subject:	Active galactic nuclei. -
Online resource:	http://dx.doi.org/10.1007/978-981-287-721-5
ISBN:	9789812877215$q(electronic bk.)

X-ray studies of the central engine in active galactic nuclei with Suzaku
Noda, Hirofumi.

X-ray studies of the central engine in active galactic nuclei with Suzaku[electronic resource] /by Hirofumi Noda. - Singapore :Springer Singapore :2016. - xv, 153 p. :ill., digital ;24 cm. - Springer theses,2190-5053. - Springer theses..

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.

ISBN: 9789812877215$q(electronic bk.)

Standard No.: 10.1007/978-981-287-721-5doiSubjects--Topical Terms:

2148949
Active galactic nuclei.

LC Class. No.: QB858.3

Dewey Class. No.: 523.112

X-ray studies of the central engine in active galactic nuclei with Suzaku
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300 $a xv, 153 p. : $b ill., digital ; $c 24 cm.
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505 0 $a Review -- Instrumentation -- Observation and Data Reduction -- Soft X-ray Analysis -- Hard X-ray Analysis -- Discussion and Conclusion.
520 $a 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.
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650 0 $a Active galaxies. $3 2133172
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