Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analyzing spiral structure in a galactic disk with a gaseous component   Using GADGET2, we performed an SPH+N-body simulation of a galactic disk with
stellar and gas particles. This simulation allows to compare the spiral
structure in the different disk components. Also, we performed a simulation
without gaseous component to explore the effects of the gas in the spiral
pattern of the stars.

1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat