Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..503b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 503-522.
Astronomy and Astrophysics
Astrophysics
61
Galactic Evolution, Galactic Rotation, Galactic Structure, Gravitational Fields, Interacting Galaxies, Orbit Calculation, Three Body Problem, Algorithms, Equations Of Motion, Monte Carlo Method
Scientific paper
A multiple three-body algorithm (MTBA) numerical code has been developed for the study of interacting binary galaxy evolution which involves N concurrent three-body integrations. The sum of the interactions of the perturber with each of the N particles comprising the primary galaxy determines the binary orbital evolution. MTBA incorporates a violent relaxation phase which allows the particles to redistribute themselves in the gravitational field of the perturber before full binary orbital evolution calculation. Tabulated merger times for both circular and elliptical orbits demonstrate that typical close binary galaxies will merge in approximately twice their initial binary orbital periods, or about one billion years, with this time scale being strongly dependent on binary separation, weakly dependent on mass ratio, and less dependent on initial galaxy rotation than has previously been thought.
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