Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-scale environments of binary AGB stars probed by Herschel - I.
  Morphology statistics and case studies of R Aquarii and W Aquilae   The Mass loss of Evolved StarS (MESS) sample offers a selection of 78
Asymptotic Giant Branch (AGB) stars and Red Supergiants (RSGs) observed with
the PACS photometer on-board Herschel at 70 and 160 {\mu}m. For most of these
objects, the dusty AGB wind differs from spherical symmetry and the wind shape
can be subdivided into four classes. In the present paper we concentrate on the
influence of a companion on the morphology of the stellar wind. Literature was
searched to find binaries in the MESS sample and these are subsequently linked
to their wind-morphology class to assert that the binaries are not distributed
equally among the classes. In the second part of the paper we concentrate on
the circumstellar environment of the two prominent objects R Aqr and W Aql.
Each shows a characteristic signature of a companion interaction with the
stellar wind. For the symbiotic star R Aqr, PACS revealed two perfectly
opposing arms which in part reflect the previously observed ring-shaped nebula
in the optical. However, from the far-IR there is evidence that the emitting
region is elliptical rather than circular. The outline of the wind of W Aql
seems to follow a large Archimedean spiral formed by the orbit of the companion
but also shows strong indications of an interaction with the interstellar
medium. The nature of the companion of W Aql was investigated and the magnitude
of the orbital period supports the size of the spiral outline.

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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: q-bio
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The categories of this paper are: eess