Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The RINGS Survey: High-Resolution H-alpha Velocity Fields of Nearby
  Spiral Galaxies with the SALT Fabry-Perot   We have obtained high-spatial-resolution spectrophotometric data on several
nearby spiral galaxies with the Southern African Large Telescope (SALT)
Fabry-P\'erot interferometer on the Robert Stobie Spectrograph (RSS) as a part
of the RSS Imaging spectroscopy Nearby Galaxy Survey (RINGS). We have
successfully reduced two tracks of Fabry-P\'erot data for the galaxy NGC 2280
to produce a velocity field of the H-alpha line of excited hydrogen. We have
modeled these data with the DiskFit modeling software and found these models to
be in excellent agreement both with previous measurements in the literature and
with our lower-resolution HI velocity field of the same galaxy. Despite this
good agreement, small regions exist where the difference between the H-alpha
and HI velocities is larger than would be expected from typical dispersions. We
investigate these regions of high velocity difference and offer possible
explanations for their existence.

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The categories of this paper are: math
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga