Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A possible GeV-radio correlation for starburst galaxies   For star-forming regions, there is a correlation of radio and FIR-emission
established. The radio emission is caused by synchrotron radiation of
electrons, while the FIR emission is attributed to HII regions of OB stars and
hot dust powered by those stars. Another possible correlation for star-forming
regions might exist between the aforementioned radio emission and the gamma ray
emission in the GeV regime. The GeV gamma ray emission of star-forming regions
is dominated by the decay of neutral pions formed in collisions of cosmic ray
(CR) protons accelerated at supernova remnants (SNRs) with ambient hydrogen,
while the electrons generating the synchrotron emission are assumed to be
accelerated at the same SNRs. Assuming the same spectral shape for the CR
proton and electron distribution and a fixed ratio of CR protons to electrons,
the proton- and electron-calorimetry of the star-forming regions can be tested.
Furthermore, this provides a method to derive the magnetic field strength in
the star-forming region complementary to the existing methods.

17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th