EDP Sciences
Free access
Volume 432, Number 2, March III 2005
Page(s) 609 - 618
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20041794

A&A 432, 609-618 (2005)
DOI: 10.1051/0004-6361:20041794

Electromagnetic radiation initiated by hadronic jets from microquasars in the ISM

V. Bosch-Ramon1, F. A. Aharonian2 and J. M. Paredes1

1  Departament d'Astronomia i Meteorologia, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain
    e-mail: vbosch@am.ub.es
2  Max-Planck-Institut fur Kernphysik, Saupfercheckweg 1, Heidelberg, 69117, Germany

(Received 4 August 2004 / Accepted 2 November 2004)

Microquasars are potential candidates to produce a non-negligible fraction of the observed galactic cosmic rays. The protons accelerated at the jet termination shock interact with the interstellar medium and may produce detectable fluxes of extended emission at different energy bands: high-energy and very high-energy $\gamma$-rays produced by neutral pion-decay, synchrotron and bremsstrahlung emission in a wide energy range generated by the secondary electrons produced by charged pion-decay. We discuss the association between this scenario and some of the unidentified EGRET sources in the galactic plane.

Key words: X-rays: binaries -- ISM: general -- gamma-rays: observations -- gamma-rays: theory

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