Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-component models for disk galaxies. I. Stellar rotation and
  anisotropy   We present here a self-consistent, tridimensional model of a disc galaxy
composed by a number of ellipsoidal distributions of matter having different
flattening and density profile. The model is self-consistent and takes into
account the observed luminosity distribution, the flattening profile and the
stellar rotation- and velocity dispersion- curves. In this paper we considered
the particular case of a disc galaxy composed by two spheroidal bodies: an
exponential disc and a bulge following the r^{1/4} law. We studied the behavior
of the stellar rotation- and velocity dispersion- profiles along the sequence
of S0s and Spirals, identified by an increasing disc-to-bulge ratio. Inside
every class, kinematic curves were produced by changing the relative
concentration of the two components and the inclination of the galaxy with
respect to the line of sight. The comparison with observational data requires
only two scaling factors: the total mass of the galaxy, and the effective
radius.
  The model allows also to detect the presence of anisotropy in the velocity
distribution. In the special case of S0s, we explored the sensitivity of the
kinematics of the model by changing the anisotropy and the flattening of the
bulge. For intermediate flattening (0.4<b/a<0.85) it is possible to distinguish
a change of anisotropy of 15%.
  To show a real case, the model has been applied to the photometric and
kinematic data of NGC 5866. We plan to apply these models to a larger database
of S0 galaxies in a future paper.

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The categories of this paper are: hep-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
2
The categories of this paper are: math