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γ-ray production via IC scattering of the infrared excess from the Be-type star in the binary system PSR B1259-63/SS2883

Published online by Cambridge University Press:  12 July 2011

Brian van Soelen  and
Pieter J. Meintjes
Brian van Soelen
Affiliation:
Department of Physics, University of the Free State, Bloemfontein, Republic of South Africa email: vansoelenb@ufs.ac.za
Pieter J. Meintjes
Affiliation:
Department of Physics, University of the Free State, Bloemfontein, Republic of South Africa email: MeintjPJ@ufs.ac.za
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Abstract

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Un-pulsed γ-ray emission has been detected close to periastron in the pulsar/Be-star binary system PSR B1259-63/SS 2883, believed to originate from the shock front that forms between the stellar and pulsar winds. A likely source of γ-ray production is the inverse Compton up-scattering of target photons from the Be star by relativistic electrons/positrons in the pulsar wind. In this study the influence of the infrared radiation, emanating from the circumstellar disc, on isotropic inverse Compton γ-ray production is investigated. It is shown that the scattering of infrared disc photons can increase the γ-ray flux by a factor ~2 in the 1–10 GeV range.

Keywords

stars: emission-lineBebinaries: generalgamma rays: theory
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 636 - 637
Copyright
Copyright © International Astronomical Union 2011

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