Statistics – Computation
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243..118s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 1, March 1991, p. 118-138. Research supported by Wihuri Foundation an
Statistics
Computation
46
Active Galaxies, Computational Astrophysics, Gravitational Fields, Interacting Galaxies, Spiral Galaxies, Mass Transfer, Polar Coordinates, Star Formation Rate, Tides
Scientific paper
A study is presented describing a methodology for simulations of two disks, which attempts to combine the advantages of both polar and Cartesian grids. The gravitational potential is tabulated with two moving, mutually overlapping polar grids, whose centers are attached to the centers of the two halos. As logarithmic grids can cover large areas with a very limited number of mesh points, there are no restrictions on the distance between interacting systems. Thus, large initial separations can be utilized, assuring that systems have time to settle into steady state before tidal forces start to influence their dynamics. It is shown that the formation of stellar bars depends on the simultaneous effects of the rotation curve, the geometry and strength of the perturbation, and the disk-halo mass ratio.
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