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New Runaway O-stars Based on Data from HIPPARCOS

Mdzinarishvili, T. G.

12 new runaway O-stars are identified using an analysis of their proper motions based on data from HIPPARCOS. The peculiar tangential and total transverse velocities of these stars are determined. A list of the observed runaway stars is given.

Absolute Calibration of the PL-Relations for the Classical Cepheids Based on the HIPPARCOS Parallaxes and the Distances of the Magellanic Clouds

Abrahamyan, H. V.

The zero points of the period-luminosity relations for the classical cepheids are calibrated based on the HIPPARCOS parallaxes of these stars. The calibrations are used to determine the distance moduli of the LMC and SMC: DM_LMC = 18^m.569 ± 0^m.117 and DM_SMC = 19^m.070 ± 0^m.119, respec…