Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interstellar $^{36}$S: a probe of s-process nucleosynthesis   The first detection of a $^{36}$S-bearing molecule in interstellar space is
reported. The $J$=$2-1$ and $3-2$ transitions of C$^{36}$S have been observed
toward eight Galactic molecular hot cores. From a comparison with other
optically thin isotopic species of CS, the abundance ratio of $^{34}$S/$^{36}$S
is 115$(\pm 17)$. This is smaller than the solar system ratio of 200 and
supports the idea that $^{36}$S is, unlike the other stable sulfur isotopes, a
purely secondary nucleus that is produced by s-process nucleosynthesis in
massive stars.

14
The categories of this paper are: math-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an