Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Relative Spatial Distribution of SiO Masers in AGB Stars at 43 and
  86 GHz   We present the first VLBI images of SiO masers in the circumstellar envelope
of an S-type star obtained with the newly developed capabilities of the Very
Long Baseline Array (VLBA) at 86 GHz. We combine these data with those obtained
quasy simultaneously at 43 GHz. These observations provide information on the
structure and dynamics of the innermost circumstellar shells, where the return
of large quantities of stellar material to the interstellar medium starts.
Despite of the fact that these are prelimininary results, we report that the
maser emission of the $v$=1 J=1--0 and J=2--1 present a very different emission
distribution, being not coincident in most case.

19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th