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Fast spectral variability in the x-ray emission of accreting black holes

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Fast spectral variability in the x-ray emission of accreting black holes/ by Chris Skipper.
Author:	Skipper, Chris.
Published:	Cham :Springer International Publishing : : 2015.,
Description:	xxxiii, 150 p. :ill., digital ; : 24 cm.;
Contained By:	Springer eBooks
Subject:	X-ray astronomy. -
Online resource:	http://dx.doi.org/10.1007/978-3-319-09587-5
ISBN:	9783319095875 (electronic bk.)

Fast spectral variability in the x-ray emission of accreting black holes
Skipper, Chris.

Fast spectral variability in the x-ray emission of accreting black holes[electronic resource] /by Chris Skipper. - Cham :Springer International Publishing :2015. - xxxiii, 150 p. :ill., digital ;24 cm. - Springer theses,2190-5053. - Springer theses..

Declaration of Authorship -- Acknowledgements -- Introduction -- AGN: Absorption, spectral classification and the optical emission lines -- Very Fast X-ray Spectral Variability in Cygnus X-1 -- The mE relationship in XRBs and AGN -- Conclusions -- Spectra of Compton-thick AGN -- Spectra of Compton-thin AGN -- References.

This thesis brings together the various techniques of X-ray spectral analysis in order to examine the properties of black holes that vary in mass by several orders of magnitude. In all these systems it is widely accepted that the X-ray emission is produced by Compton up-scattering of lower energy seed photons in a hot corona or accretion flow, and here these processes are examined through a study of the X-ray spectral variability of each source. A new technique is introduced, in which models are fitted to over 2 million X-ray spectra on time-scales as short as 16 ms, and subsequently it is shown that the nature of the correlation between intensity and spectral index is strongly dependent upon the spectral state of the black hole. Finally, the results of an extensive survey of nearby galactic nuclei using the Chandra X-ray telescope are presented in the form of images and spectra, and these results are used along with data from the literature to search for Compton-thick nuclei.

ISBN: 9783319095875 (electronic bk.)

Standard No.: 10.1007/978-3-319-09587-5doiSubjects--Topical Terms:

679250
X-ray astronomy.

LC Class. No.: QB472

Dewey Class. No.: 522.6863

Fast spectral variability in the x-ray emission of accreting black holes
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520 $a This thesis brings together the various techniques of X-ray spectral analysis in order to examine the properties of black holes that vary in mass by several orders of magnitude. In all these systems it is widely accepted that the X-ray emission is produced by Compton up-scattering of lower energy seed photons in a hot corona or accretion flow, and here these processes are examined through a study of the X-ray spectral variability of each source. A new technique is introduced, in which models are fitted to over 2 million X-ray spectra on time-scales as short as 16 ms, and subsequently it is shown that the nature of the correlation between intensity and spectral index is strongly dependent upon the spectral state of the black hole. Finally, the results of an extensive survey of nearby galactic nuclei using the Chandra X-ray telescope are presented in the form of images and spectra, and these results are used along with data from the literature to search for Compton-thick nuclei.
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