Modulation of the high energy γ-ray flux from PSR B1259-63/SS2883 due to the orbital variation of the maximum energy of accelerated electrons |
| |
Authors: | Dmitry Khangulyan Slavomir Hnatic Felix Aharonian |
| |
Affiliation: | (1) Max-Planck-Institut für Kernphysik, Postfach 10 39 80, 69029 Heidelberg, Germany |
| |
Abstract: | The inverse Compton (IC) scattering of ultrarelativistic electrons accelerated at the pulsar wind termination shock is generally believed to be responsible for TeV gamma-ray signal recently reported from the binary system PSR B1259-63/SS2883. In such a system the acceleration takes place in the presence of a dense radiation field provided by a companion Be2-type star. Thus it is natural to expect an orbital phase dependence of the acceleration efficiency in the system. The HESS collaboration reported the tendency of reduction of TeV γ-rays around the periastron. In this paper we study a possible explanation of this effect by the “early” (sub-TeV) cutoffs in the energy spectrum of accelerated electrons due to the enhanced rate of Compton losses close to the periastron. |
| |
Keywords: | Acceleration of particles— binaries Gamma-rays PSR B1259-63 |
本文献已被 SpringerLink 等数据库收录! |