Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NGC2613, 3198, 6503, 7184: Case studies against `maximum' disks   Decompositions of the rotation curves of NGC2613, 3198, 6505, and 7184 are
analysed. For these galaxies the radial velocity dispersions of the stars have
been measured and their morphology is clearly discernible. If the parameters of
the decompositions are chosen according to the `maximum' disk hypothesis, the
Toomre Q stability parameter is systematically less than one and the
multiplicities of the spiral arms as expected from density wave theory are
inconsitent with the observed morphologies of the galaxies. The apparent Q<1
instability, in particular, is a strong argument against the `maximum' disk
hypothesis.

13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph