Modified masses and parallaxes of close binary system: HD39438

TL;DR

This paper determines the fundamental stellar parameters and a new dynamical parallax for the close binary system HD39438 using Al-Wardat's method, combining spectral and photometric analyses.

Contribution

It applies Al-Wardat's method to derive detailed parameters and a new dynamical parallax for HD39438 for the first time.

Findings

System components are main sequence stars with masses 1.24 and 0.98 solar masses.

Estimated age of the system is approximately 2 billion years.

New dynamical parallax is 16.689 mas.

Abstract

We present the detailed fundamental stellar parameters of the close visual binary system; HD39438 for the first time. We used Al-Wardat's method for analyzing binary and multiple stellar systems (BMSSs). The method implements Kurucz's plane parallel model atmospheres to construct synthetic spectral energy distributions for both components of the system. It then combines the results of the spectroscopic analysis with the photometric analysis and then compares them with the observed ones to construct the best synthetic spectral energy distributions for the combined system. The analysis gives the precise fundamental parameters of the individual components of the system. Based on the positions of the components of HD39438 on the H-R diagram, and evolutionary and isochrones tracks, we found that the system belongs to the main sequence stars with masses of 1.24 and 0.98 solar masses for the components A and B, respectively, and age of 1.995 Gyr for both components. The main result of HD39438 is new dynamical parallax, which is estimated to be 16.689+- 0.03 mas.