High-energy processes in starburst-driven winds

Ana L. Müller, Gustavo E. Romero, Markus Roth.

Serie: Trabajos publicados del IAR ; no. 1545

Resumen: Starburst galaxies generate large-scale winds powered by the activity inthe star-forming regions located in the galactic discs. Fragmentation ofthe disc produced by the outbreak of the wind results in the formationof clouds. Bowshocks caused by the supersonic outflow appear around suchclouds. In this paper, we discuss the acceleration of relativisticparticles and the production of non-thermal radiation in such scenario.Cosmic rays accelerated at the bowshocks do not reach the highestenergies, although the high-energy luminosity generated is significant.We show that up to ∼10 per cent of the gamma-ray emission in starburstsmight come from these sources outside the galactic discs. Discrete X-raysources with a power-law component are also expected.