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High-energy emission from galaxies: the star-formation/gamma-ray connection

Published online by Cambridge University Press:  17 August 2012

Stefan Ohm  and
Jim Hinton
Stefan Ohm
Affiliation:
X-ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, LE1 7RH, UK email: [email protected] School of Physics and Astronomy, University of Leeds, LS2 9JP, UK email: [email protected]
Jim Hinton
Affiliation:
X-ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, LE1 7RH, UK email: [email protected]
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Abstract

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The impact of non-thermal processes on the spectral energy distributions of galaxies can be dramatic, but such processes are often neglected in considerations of their structure and evolution. Particle acceleration associated with high mass star formation and AGN activity not only leads to very broad band (radio-γ-ray) emission, but may also produce very significant feedback effects on galaxies and their environment. The recent detections of starburst galaxies at GeV and TeV energies suggest that γ-ray instruments have now reached the critical level of sensitivity to probe the connection between particle acceleration and star-formation in galaxies. In this paper we will try to summarise this recent progress, put it into a multi-wavelength context and also discuss the prospects for more precise and sensitive γ-ray measurements with the upcoming CTA observatory.

Keywords

acceleration of particlesradiation mechanisms: non-thermal(stars:) supernovae: general(ISM:) cosmic raysGalaxy: centergalaxies: starburstgamma rays: observationsgamma rays: theory
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 382 - 388
Copyright
Copyright © International Astronomical Union 2012

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