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Mass determination for visual binaries

Cvetković, Z.; Ninković, S.

We consider a sample of 432 visual binaries having orbital elements and belonging to the Main Sequence. We calculate their total masses using the orbital elements and the new Hipparcos parallaxes by applying Kepler's third law. For the same pairs the total masses are also found by applying the mass-luminosity relation. The source for the apparent …

Three methods to identify local Galactic structures

Cubarsi, R.; Alcobé, S.; Vidojević, S. +1 more

Method one: by combining a sampling parameter related to an isolating integral of the stellar motion, an optimisation of the mixture approach, and a maximisation of the partition entropy for the constituent populations of the stellar sample. Method two: by segregating into different kinematical components in terms of the stellar orbital parameters…