X-ray studies of the central engine in active galactic nuclei with Suzaku [electronic resource] / Hirofumi Noda.
Noda, Hirofumi, author.
2016
QB858.3
Available Online

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Title X-ray studies of the central engine in active galactic nuclei with Suzaku [electronic resource] / Hirofumi Noda.
Author Noda, Hirofumi, author.
ISBN 9789812877215 (electronic book)
9812877215 (electronic book)
9789812877208
9812877207
DOI https://doi.org/10.1007/978-981-287-721-5
Published Singapore : Springer, 2016.
Language English
Description 1 online resource : color illustrations.
Other Standard Identifiers 10.1007/978-981-287-721-5 doi
Call Number QB858.3
Dewey Decimal Classification 523.112
Summary 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.
Note "Doctoral thesis accepted by the University of Tokyo, Tokyo, Japan."
Bibliography, etc. Note Includes bibliographical references.
Access Note Access limited to authorized users.
Source of Description Online resource; title from PDF title page (viewed December 18, 2015)
Series Springer theses.
Available in Other Form Print version: 9789812877208
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Record Appears in Online Resources > Ebooks
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Review
Instrumentation
Observation and Data Reduction
Soft X-ray Analysis
Hard X-ray Analysis
Discussion and Conclusion.

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