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03392nam a22004935i 4500 |
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978-981-287-721-5 |
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20170518235830.0 |
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|a 9789812877215
|9 978-981-287-721-5
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|a 10.1007/978-981-287-721-5
|2 doi
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|a 520
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|a Noda, Hirofumi.
|e author.
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|a X-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku
|h [electronic resource] /
|c by Hirofumi Noda.
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|a Singapore :
|b Springer Singapore :
|b Imprint: Springer,
|c 2016.
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|a XV, 153 p. 95 illus., 33 illus. in color.
|b online resource.
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|a text
|b txt
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|a computer
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|a online resource
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|a text file
|b PDF
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|a Springer Theses, Recognizing Outstanding Ph.D. Research,
|x 2190-5053
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|a Review -- Instrumentation -- Observation and Data Reduction -- Soft X-ray Analysis -- Hard X-ray Analysis -- Discussion and Conclusion.
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|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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|a Physics.
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|a Observations, Astronomical.
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|a Astronomy
|x Observations.
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|a Physical measurements.
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|a Measurement.
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|a Physics.
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|a Astronomy, Observations and Techniques.
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|a Measurement Science and Instrumentation.
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|a SpringerLink (Online service)
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|t Springer eBooks
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|i Printed edition:
|z 9789812877208
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|a Springer Theses, Recognizing Outstanding Ph.D. Research,
|x 2190-5053
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|u http://dx.doi.org/10.1007/978-981-287-721-5
|z Full Text via HEAL-Link
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|a ZDB-2-PHA
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|a Physics and Astronomy (Springer-11651)
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