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The Galactic center: a model for cosmic ray interactions in starburst galaxies?

Published online by Cambridge University Press:  22 May 2014

T. Yoast-Hull ,
J. S. Gallagher III  and
E. Zweibel
T. Yoast-Hull
Affiliation:
Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA email: [email protected] Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, WI, USA
J. S. Gallagher III
Affiliation:
Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
E. Zweibel
Affiliation:
Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA email: [email protected] Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, WI, USA Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
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Abstract

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The Galactic center contains strong magnetic fields, high radiation fields, and dense molecular gas, as is also the case in starburst galaxies. The close proximity of the Galactic center allows for more and better observations of the interstellar medium than for extragalactic sources making it an ideal place for testing models for cosmic ray interactions. We compare our semi-analytic model for cosmic ray interactions to published data for both the Galactic center and the starburst galaxy NGC 253. We present the predicted radio and γ-ray spectra and compare the results with published measurements. In this way we provide a quantitative basis for assessing the degree to which the Galactic center resembles a starburst system.

Keywords

cosmic raysGalaxy: center — galaxies: individual (NGC253) — galaxies: starburst — gamma rays: galaxies — radio continuum: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 153 - 155
Copyright
Copyright © International Astronomical Union 2014 

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