Vol 18, No 6

Physical and geometrical parameters of VCBS XIII: HIP 105947

Suhail Gumaan Masda, Mashhoor Ahmed Al-Wardat, Jiyaulla Khan Moula Khan Pathan


Abstract The best physical and geometrical parameters of the main sequence close visual binary system (CVBS), HIP 105947, are presented. These parameters have been constructed conclusively using Al-Wardat’s complex method for analyzing CVBSs, which is a method for constructing a synthetic spectral energy distribution (SED) for the entire binary system using individual SEDs for each component star. The model atmospheres are in its turn built using the Kurucz (ATLAS9) line-blanketed plane-parallel models. At the same time, the orbital parameters for the system are calculated using Tokovinin’s dynamical method for constructing the best orbits of an interferometric binary system. Moreover, the mass-sum of the components, as well as the ∆θ and ∆ρ residuals for the system, is introduced. The combination of Al-Wardat’s and Tokovinin’s methods yields the best estimations of the physical and geometrical parameters. The positions of the components in the system on the evolutionary tracks and isochrones are plotted and the formation and evolution of the system are discussed.


Keywords binaries: close — binaries: visual — stars: fundamental parameters — stars: individual (HIP 105947)

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