Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino decay and the thermochemical equilibrium of the interstellar
  medium   We calculate the thermochemical equilibrium of the diffuse interstellar
medium, including ionization by a photon flux F_{nu} from neutrino decay. The
main heating mechanism considered is photoelectrons from grains and PAHs. For
the studied range of F_{nu} values, there always exists two regions of
stability (a warm and a cold phase) that can coexist in equilibrium if the
thermal interstellar pressure is between a maximum value P_{max} and a minimum
value P_{min}. High F_{nu} values (~10^4-10^5 cm^{-2} s^{-1}) can be consistent
with observed interstellar pressures only if more efficient sources are heating
the gas. It is shown that a neutrino flux increase (due, for example, to an
increase in the supernova explosion rate) may stimulate the condensation of
cold gas by decreasing P_{max} below the interstellar pressure value.

22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin