Doppler-boosting emission from a high-mass gamma-ray binary with a non-accreting pulsar

Abstract

Gamma-ray binaries are bright sources of [gamma]-ray emission in the Galaxy. Here, we study the Doppler-boosting effects on the radiation from these sources in a simplifed scenario. By modelling the structure of the shocked stellar and pulsar winds, we study the changes in the observed luminosity with variations in the orbital phase and in the angle with respect to the structure symmetry axis. The obtained results show how the orbital position of the pulsar, and the orientation of the observer, affect the radiation that can be observed.