Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Environs of Bilateral Supernova Remnants with Neutron Stars   We report on Australia Telescope Compact Array (ATCA) HI observations carried
out in the direction of bilateral supernova remnants (SNRs) with associated
neutron stars: G296.5+10.0 and G320.4--1.2, in a search for the origin of such
morphology. From these studies we conclude that in the case of G296.5+10.0,
located far from the Galactic plane, the HI distribution has not influenced the
present morphology of the SNR. In the case of G320.4--1.2, evolving in a denser
medium, the combined action of the central pulsar, PSR B1509-58, with the
peculiar distribution of the surrounding medium, has determined the observed
characteristics of the SNR.

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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: physics