Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HST Observations of the Nuclear Regions of the Toomre Sequence of
  Merging Galaxies   We present first results from an HST WFPC2 imaging and STIS spectroscopy
program to investigate the structural and star forming properties in the
nuclear regions of the Toomre Sequence of merging galaxies. Here we discuss
V-band, I-band and H-alpha images of the nuclei. We comment briefly on the
connection between the nuclear morphology of the ionized gas and the merger
stage.

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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
19
The categories of this paper are: eess
2
The categories of this paper are: math
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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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: acc-phys
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat