Creating Galaxies On A PC  

Oleh:

Raczynski, Stanislaw

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Simulation vol. 74 no. 3 (Mar. 1998), page 161-166.
Topik: Galactic simulation; N-body systems
Fulltext: 161.pdf (553.84KB)

Isi artikel

It is shown that galactic simulation does not require a supercomputer. The capacity of new PCs is enough to simulate an N-body system with the number of bodies sufficient to see a galaxy formation from chaos to a disk with a spiral galactic structure. Naturally, simulations with millions of bodies realized on parallel supercomputers provide more realistic images. However, the number of bodies is not acrucial factor if rather qualitative results are expected. By simulating a pure gravitational system with only 500 particles on a PC, one can observe a fascinating history of a galaxy evolution. Some algorithms for N-body integration are discussed and an implementation af a simple "neighbor and far interactions" algorithm is presented. The complete history of a simulated galaxy is shown, including the initial collapse, expansion, formation of the early cloud with rotational movement and, finally, a spiral structure.

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