Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical evolution of rotating stellar systems: I pre-collapse, equal
  mass systems   The influence of rotation on the dynamical evolution of collisional stellar
systems is investigated by solving the orbit-averaged Fokker-Planck equation in
(E,J_z)-space. We find that large amounts of initial rotation drive the system
into a phase of strong mass loss while it is moderately contracting. The core
is rotating even faster than before although angular momentum is transported
outwards. At the same time the core is heating. Given these features this phase
can be associated with the gravo-gyro 'catastrophe' found by Hachisu (1979).
The increase in central angular momentum levels off after about 2-3 initial
half-mass relaxation times indicating that the source of this `catastrophe' is
depleted. Finally, the central angular velocity increases again, but with a
rather small power of the central density -- the same power as for the central
velocity dispersion during self-similar contraction towards the collapse. The
rotation curves flatten and the ellipticity variations decrease with time, but
their shapes are very similar. These results suggest the existence of a
self-similar solution for a rotating cluster as well. The maximum values of
rotational velocity and ellipticity occur at about the half mass radius.

34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an