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Pair-induced spectral changes and variability in compact X-ray sources

Fabian, A. C. and Blandford, R. D. and Guilbert, P. W. and Phinney, E. S. and Cuellar, L. (1986) Pair-induced spectral changes and variability in compact X-ray sources. Monthly Notices of the Royal Astronomical Society, 221 (4). pp. 931-945. ISSN 0035-8711. doi:10.1093/mnras/221.4.931.

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Inverse Compton scattering of ultraviolet photons by GeV electrons produces γ-rays which in turn create electron–positron pairs if the source is sufficiently compact. The pairs modify the emergent radiation spectrum through their own inverse Compton scattering and through thermal Comptonization after they have cooled to sub-relativistic temperatures. Recent calculations of spectral reprocessing under these conditions are extended to situations in which the Thomson optical depth of the pair plasma exceeds unity, and to demonstrate time-dependent behaviour explicitly. The relevance of our results to X-ray observations of active galactic nuclei, binary X-ray sources and γ-ray bursters is discussed briefly.

Item Type:Article
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URLURL TypeDescription
Fabian, A. C.0000-0002-9378-4072
Blandford, R. D.0000-0002-1854-5506
Additional Information:© 1986 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Accepted 1986 March 21. Received March 21; in original form 1986 February 26. We thank R. Svensson for discussions. RB acknowledges financial support under National Science Foundation grants AST82-13001 and AST84-75355. LC acknowledges support under the Caltech Summer Undergraduate Research Fellowship Program. ACF thanks the Royal Society for support. The research of ESP is supported in part by a Presidential Young Investigators Award, NSF AST84-51725 and a grant from the Exxon Education Foundation.
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Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Exxon Education FoundationUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20190521-165452868
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Official Citation:A. C. Fabian, R. D. Blandford, P. W. Guilbert, E. S. Phinney, L. Cuellar, Pair-induced spectral changes and variability in compact X-ray sources, Monthly Notices of the Royal Astronomical Society, Volume 221, Issue 4, 1 August 1986, Pages 931–945,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95660
Deposited By: George Porter
Deposited On:23 May 2019 14:51
Last Modified:16 Nov 2021 17:14

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