Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Molecular Winds in Evolved Stars I. A Survey of CO(2-1) and
  CO(3-2) Emission from 45 Nearby AGB Stars   This paper describes observations of a new phenomenon in evolved mass-losing
AGB stars: the presence of two winds with different expansion velocities.
CO(2-1) and CO(3-2) line emission was observed for 45 AGB stars at high
velocity resolution and double winds found in 20% of the sample. Highly
asymmetric lines were found in six other stars. The data tentatively suggest
that double winds occur when the star undergoes a change (pulsational mode,
chemical composition) and that the very narrow components represent the onset
of a new phase of mass loss.

16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex