Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mapping the Extended HI Distribution of Three Dwarf Galaxies   We present large field HI-line emission maps obtained with the single-dish
Green Bank Telescope centered on the dwarf irregular galaxies Sextans A, NGC
2366, and WLM. We do not detect the extended skirts of emission associated with
the galaxies that were reported from Effelsberg observations (Huchtmeier et al.
1981). The ratio of HI at 10^19 atoms cm^-2 to optical extents of these
galaxies are instead 2--3, which is normal for this type of galaxy. There is no
evidence for a truncation in the HI distribution >/=10^19 atoms cm^-2.

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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg