Statistics – Computation
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330...61b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 1, 1988, p. 61-77.
Statistics
Computation
28
Astronomical Models, Computational Astrophysics, Galactic Clusters, Interacting Galaxies, Algorithms, Angular Velocity, Galactic Mass
Scientific paper
Successful efforts to match interaction models to all of the available data for two pairs of interacting binary galaxies, Nos. 99 and 564 in the Karachentsev catalog of isolated pairs, are described. The results validate simple Newtonian gravity on the 10 kpc scale. The dynamical orbital status of both K99 and K564 is uniquely determined, and the masses and spatial orientations of the pairs are tightly constrained. Total masses for the pairs are derived which are quite reasonable and yield M/L values near 10. It is concluded that the observed disturbances in rotation velocity and luminosity distribution for these binary galaxies are entirely consistent with the merger hypothesis. Distortions including U-shaped rotation profiles and one-sided luminosity disturbances provide solid observational evidence of tidal friction in action.
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