EMCCD Speckle Measurements, Differential Photometry and Dynamical Masses of Visual Binary Stars

Abstract

We report results of the EMCCD speckle measurements and differential photometry conducted for 46 visual binaries with the 6 m telescope of SAO (Russia) in 2007. The orbits for COU 1281 and COU 1037 are calculated for the first time and those for CHA 137, COU 100, COU 1136, CHA 51, CHA 55, COU 206, ADS 13961 are improved. Using dynamical parallax, both distance and total mass estimates for these pairs were obtained. In general, dynamical parallaxes and total masses are in good agreement with Hipparcos data and standard mass‐luminosity calibrations respectively.