Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synchrotron radiation from molecular clouds   Observations of the properties of dense molecular clouds are critical in
understanding the process of star-formation. One of the most important, but
least understood, is the role of the magnetic fields. We discuss the
possibility of using high-resolution, high-sensitivity radio observations to
measure the in-situ synchrotron radiation from these molecular clouds. If the
cosmic-ray particles penetrate clouds as expected, then we can measure the
B-field strength directly using radio data. So far, this signature has never
been detected from the collapsing clouds themselves and would be a unique probe
of the magnetic field. Dense cores are typically ~0.05 pc in size,
corresponding to ~arcsec at ~kpc distances, and flux density estimates are ~mJy
at 1 GHz. They should be detectable, for example with the Square Kilometre
Array.

7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom