Gamma-ray and neutrino emission from misaligned microquasars

• Main Authors: Romero, Gustavo E, Orellana, Mariana
• Format: Journal Article
• Language: English
• Published: 13-05-2005
• Subjects: Physics - Astrophysics of Galaxies; Physics - Cosmology and Nongalactic Astrophysics; Physics - Earth and Planetary Astrophysics; Physics - High Energy Astrophysical Phenomena; Physics - Instrumentation and Methods for Astrophysics; Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.astro-ph/0505287

Astron.Astrophys. 439 (2005) 237-244 Microquasars are accreting X-ray binary systems with non-thermal radio jets.
In some of these systems the jet is expected to be strongly misaligned with the
perpendicular to the orbital plane. If the donor star is an early-type star,
the jet could collide with the stellar wind producing a standing shock between
the compact object and the stellar surface. Relativistic particles injected by
the jet can be re-accelerated and isotropized at the colliding region. If the
jet has hadronic content, TeV protons will diffuse into the inner, dense wind
leading to gamma-ray and neutrino production from interactions with the matter
of the wind. In the case of very powerful jets, the wind pressure can be
overbalanced and the jet might impact directly onto the stellar surface. We
present estimates of the gamma-ray and neutrino luminosities for different sets
of parameters in these scenarios and we briefly discuss the effects of this
radiation on the donor star and its detectability with current instruments.