Equilibrium after violent relaxation in numerical dynamical models of open clusters |
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| Authors: | V M Danilov |
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| Institution: | (1) Astronomical Observatory, Ural State University, pr. Lenina 51, Yekaterinburg, 620083, Russia |
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| Abstract: | Models of open clusters in a state of equilibrium in the space of the three parameters of the stellar motion and simultaneously far from virial equilibrium are analyzed. A formula for the phase-space stellar number density in such cluster models is derived, as well as formulas for the integrated and differential energy distributions of the phase-space volume occupied by cluster stars per unit stellar mass. These three quantities are computed for several times exceeding the time for violent relaxation of the cluster model. The phase-space density function obtained is used to compute the distribution of the absolute values of stellar velocities for the cluster model considered. |
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