Physical and Geometrical Parameters of CVBS XII: Fin 350 (Hip 64838)

TL;DR

This study thoroughly analyzes the close visual binary system Finsen 350 using spectral energy distribution data, applying advanced methods to determine its physical, geometrical, and dynamical parameters, confirming a short orbital period and main sequence status.

Contribution

It introduces a combined application of Al-Wardat's and Docobo's methods to derive detailed parameters and orbit solutions for the CVBS Finsen 350, confirming the short orbital period.

Findings

Confirmed the short orbital period of approximately 9 years.

Derived physical parameters such as temperatures, radii, and masses.

Established the system's main sequence status with an age of around 0.79 Gy.

Abstract

A complete astrophysical and dynamical study of the close visual binary system (CVBS) (A7V + F0V), Finsen 350, is presented. Beginning with the entire observational spectral energy distribution (SED) and the magnitude difference between the subcomponents, Al-Wardat's complex method for analyzing close visual binary stars (CVBS) was applied as a reverse method of building the individual and entire synthetic SEDs of the system. This was combined with Docobo's analytic method to calculate the new orbits. Although possible short ($\approx$ 9 years) and long period ($\approx$ 18 years) orbits could be considered taking into account the similar results of the stellar masses obtained for each of them (3.07 and 3.41 $M_{\odot}$, respectively), we confirmed that the short solution is correct. In addition, other physical, geometrical and dynamical parameters of this system such as the effective temperatures, surface gravity accelerations, absolute magnitudes, radii, the dynamical parallax, etc., are reported. The main sequence phase of both components with age around 0.79 Gy is approved.