Estimation of the masses of selected stars of Pulkovo program by means of astrometry methods

TL;DR

This paper demonstrates how astrometry methods applied to long-term observations of Pulkovo stars can determine stellar masses and orbits, including unseen companions, using direct astrometric techniques.

Contribution

It introduces a methodology for estimating stellar masses and orbits from astrometric data of binary and single stars observed over many years.

Findings

Masses of binary stars ADS 14636 and ADS 7251 were determined.

Masses of unseen companions in stars Gliese 623 and ADS 8035 were estimated.

Astrometric methods proved effective for long-term stellar mass estimation.

Abstract

Stars of Pulkovo observatory program are observed on 65-cm refractor during many years for study their positions and movement. We represent example of two visual binary stars, for which orbits and masses of components were determined, and two astrometric stars, for which masses of their unseen companions have been estimated. The first stars are: ADS 14636 (61 Cygni) and ADS 7251 and others are: Gliese 623 and ADS 8035 (Alpha UMa). The direct astrometric methods were used for estimation of mass-ratio and masses.