Binary Pulsar Shock Emissions as Galactic Gamma-Ray Sources
Abstract
We address several issues regarding the interpretation of galactic \ggg-ray sources. We consider powerful pulsars in binaries producing X-ray and gamma-ray {\it unpulsed} emission from the shock interaction of relativistic pulsar winds with circumbinary material. Nebular mass outflows from companion stars of binary pulsars can provide the right {\it calorimeters} to transform a fraction of the electromagnetic and kinetic energy of pulsar winds into high energy radiation. We discuss the physics of interaction of relativistic pulsar winds with gaseous material and show that the conditions in pulsar binary systems might be ideal to constrain shock acceleration mechanisms and pulsar wind composition and structure. We briefly discuss the example of the 47~ms pulsar PSR~1259-63 orbiting around a massive Be~star companion and monitored by X-ray and gamma-ray instruments during its recent periastron passage. In addition to young pulsars in massive binaries, also a class of recycled millisecond pulsars in low-mass binaries can be interesting high energy emitters.
Keywords
Cite
@article{arxiv.astro-ph/9502058,
title = {Binary Pulsar Shock Emissions as Galactic Gamma-Ray Sources},
author = {M. Tavani},
journal= {arXiv preprint arXiv:astro-ph/9502058},
year = {2016}
}
Comments
16 pages, PostScript file, no figures, invited talk given at the Les Houches Advanced Study Institute "The Gamma-Ray Sky with Compton GRO and SIGMA", February 1994.