Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detecting the growth of structures in Pure Stellar Disk Models   We performed a series of 3D N-body simulations where the initial conditions
were chosen to get two sets of models; unbarred and barred ones. In this work,
we analyze the growth of spirals and bar structures using 1D, and 2D Fourier
Transforms FT methods. Spectrograms and diagrams of the amplitude of the
Fourier coefficients as a function of time, radius and pitch angle show that
the general morphology, of our modeled galaxies, is due to the superposition of
structures which have different values of pitch angle and number of arms. Also,
we made in barred models a geometric classification of orbits from the bar
reference frame showing that the barred potential and the Lagrangian points
$L_4$ and $L_5$ catch approximately one-third of the total disk mass.

11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas