Gamma-ray emission from microquasar jets/ISM interaction

P. Bordas, J. M. Paredes and V. Bosch-Ramon.

Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy.

J. M. Paredes investigador correspondiente del IAR.

Resumen: The high kinetic energy outflowing in the jets of microquasars is delivered to the surrounding interstellar medium. This energy input can lead to the formation of bow shocks and cocoons that may emit from radio to gamma-ray energies. Evidence and hints of emission from jet/medium interactions have been reported for some sources, but little has been done regarding the theoretical modelisation of the resulting non-thermal emission. We have developed an analytical model for the interaction of microquasar jets with their surroundings based on those successfully applied in AGNs. Focusing on the adiabatic phase of the growing structures, we give estimations of the expected luminosities at high and very high energies, and study the detectability with present (MAGIC, HESS, VERITAS and GLAST) and future (CTA) gamma-ray observatories