Physical and geometrical parameters of CVBS X: the spectroscopic binary Gliese 762.1
We present the physical and geometrical parameters of the individual components of the close visual double-lined spectroscopic binary system Gliese 762.1, which were estimated using Al-Wardat's complex method for analyzing close visual binary systems. The estimated parameters of the individual components of the system are as follows: radius RA = 0.845 ? 0.09 R ?, RB = 0.795 ? 0.10 R ?, effective temperature TA eff = 5300 ? 50 K, TB eff = 5150 ? 50 K, surface gravity log gA = 4.52 ? 0.10, log gB = 4.54?0.15 and luminosity LA = 0.51?0.08 L ?, LB = 0.40?0.07 L ?. New orbital elements are presented with a semi-major axis of 0.0865 ? 0.010 arcsec using the Hippracos parallax ? = 58.96 ? 0.65 mas, and an accurate total mass and individual masses of the system are determined as M = 1.72 ? 0.60 M?, MA = 0.89 ? 0.08 M ? and MB = 0.83 ? 0.07 M?. Finally, the spectral types and luminosity classes of both components are assigned as K0V and K1.5V for the primary and secondary components respectively, and their positions on the H-R diagram and evolutionary tracks are given.
Publishing Year
2016