To be published in Astrophysics and Space Science
Proceedings.
astro-ph/1304.0416
For a PDF version of the article, click here.
NONTHERMAL EMISSION FROM STAR-FORMING GALAXIES
Yoel Rephaeli 1 and Massimo Persic
2
1 School
of Physics and Astronomy, Tel Aviv University,
Tel Aviv, 69978, Israel
and
Center for Astrophysics and Space Sciences,
University of
California, San Diego, La Jolla, CA 92093-0424, USA
2 INAF/Osservatorio Astronomico di Trieste and
INFN-Trieste,
via G.B.Tiepolo 11, I-34143 Trieste, Italy
Abstract: The detections of high-energy
-ray
emission from
the nearby starburst galaxies M 82 & NGC 253, and other
local group galaxies, broaden our knowledge of star-driven nonthermal
processes and phenomena in non-AGN star-forming galaxies. We review
basic aspects of the related processes and their modeling in starburst
galaxies. Since these processes involve both energetic electrons and
protons accelerated by SN shocks, their respective radiative yields can
be used to explore the SN-particle-radiation connection. Specifically,
the relation between SN activity, energetic particles, and their
radiative yields, is assessed through respective measures of the
particle energy density in several star-forming galaxies. The deduced
energy densities range from
(10-1) eV
cm-3 in very quiet environments to
(102) eV
cm-3 in regions with very high star-formation rates.
Table of Contents
