Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global disk model for galaxies NGC 1365, NGC 6946, NGC 7793, UGC 6446   Spiral galaxies are studied using a simple global disc model as a means for
approximate determination of mass profiles. Based on rotation curves and the
amount of gas (HI+He), we find global surface mass densities consistent with
measurements and compare them with B-band surface brightness profiles. As a
result we obtain mass-to-light ratio profiles. We give some arguments for why
our approach is reliable and sometimes better than those assuming ad hoc the
presence of a massive non-baryonic dark matter halo. Using this model, we study
galaxies NGC 7793, 1365, 6946 and UGC 6446. Based on a rotation curve from The
HI Nearby Galaxy Survey (THINGS) we also study galaxy NGC 4536 and compare the
results with those we published elsewhere for the same galaxy.

22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
3
The categories of this paper are: physics
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio