Other
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rmxaa..41..389v&link_type=abstract
Revista Mexicana de Astronomía y Astrofísica Vol. 41, pp. 389-397 (2005) (http://www.astroscu.unam.mx/~rmaa/)
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1
Galaxies: Kinematics And Dynamics, Methods: N-Body Simulations, Methods: Numerical
Scientific paper
A set of N-body simulations of disk galaxies has been carried out to study the heating effects on the disk component, resulting from two-body encounters. We have quantified the diffusion coefficients and relaxation times in the radial and vertical directions at a given reference radius. Disk self-heating plays a marginal role in the vertical heating of the disk while it has an important contribution to the radial heating whenever the halo is not poorly sampled; otherwise, both the radial and vertical heating will be dominated by disk-halo particle encounters. Also, it is found that the disk is more efficiently heated in the radial direction than in the vertical one at a given radius. Finally, an expression has been derived to estimate, a priori, the number of halo particles (inside the reference radius) required to maintain the heating of the disc within a desired level.
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