Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new Monte Carlo code for star cluster simulations: I. Relaxation   We have developed a new simulation code aimed at studying the stellar
dynamics of a galactic central star cluster surrounding a massive black hole.
In order to include all the relevant physical ingredients (2-body relaxation,
stellar mass spectrum, collisions, tidal disruption,...), we chose to revive a
numerical scheme pioneered by Henon in the 70's. It is basically a Monte Carlo
resolution of the Fokker-Planck equation. It can cope with any stellar mass
spectrum or velocity distribution. Being a particle-based method, it also
allows one to take stellar collisions into account in a very realistic way.
This first paper covers the basic version of our code which treats the
relaxation-driven evolution of stellar cluster without a central BH. A
technical description of the code is presented, as well as the results of test
computations. Thanks to the use of a binary tree to store potential and rank
information and of variable time steps, cluster models with up to 2 million
particles can be simulated on a standard personal computer and the CPU time
required scales as N*ln(N) with the particle number N. Furthermore, the number
of simulated stars needs not be equal to N but can be arbitrarily larger. A
companion paper will treat further physical ingredients, mostly relevant to
galactic nuclei.

27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg