Dynamics of Wide Galaxy Triplets: Numerical Models
and Hidden Mass Estimates

V. P. Dolgachev and A. D. Chernin

Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899 Russia

Received June 25, 1996

Abstract—Dynamical models for wide galaxy triplets with large characteristic galaxy crossing times (no less
than the Hubble time) are constructed and studied using numerical simulations, taking into account the nonsta-
tionary state of ensembles of such wide systems. The results are applied to a statistical determination of the total
masses of wide triplets using observational data from a new catalog of wide triplets. The analysis indicates the
presence of considerable hidden mass in these systems.

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