An efficient analytical method for determining the orbit of a spectroscopic binary is presented. The advantages of the method are: (1) its accuracy, (2) its rapidity, and (3) the possibility of making adjustments in the ...

Proper motion measurements are employed to investigate the internal kinematics of eight open star clusters. In most of the clusters considered, no dependence of the intrinsic dispersion in proper motion on stellar mass and ...

An attempt has been made to explain the Balmer progression in velocities seen in Pleione and other shell stars. Equations of conservation of mass and momentum are simultaneously solved with assumptions which simplify the ...

The dynamical evolution of a spheroidal cluster of point masses is investigated theoretically, extending the analysis of Som Sunder and Kochhar (1985) by removing the assumption of locally isotropic velocity. The basic ...

It is noted that the angle between the space velocity vector and the spin axis projected on the plane of the sky has a value close to zero deg for three pulsars, close to 90 deg for six others, and between zero and 90 deg ...

Previous calculations of the velocity distribution function for a star cluster scenario of a class of core-envelope type static, stable, massive equilibrium configurations, capable of giving high internal gravitational ...

Analysis of rotational velocities of unevolved members in clusters indicates that for a given mass the dispersion in the true rotational velocities is small for normal, single main-sequence stars. The envelope of highest ...