2013/11/22 by M. A. Al-Wardat, Mashhoor A. Al‐Wardat, Yu. Yu. Balega +14
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1311.5737
The paper has been accepted for publication in Astrophysical Bulletin
arxiv created 2013/11/22 · openalex publication_date 2013/11/22 · arxiv updated 2013/11/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Atmospheric modeling is used to build synthetic spectral energy distributions (SEDs) for the individual components of the speckle interferometric binary system HD375. These synthetic SEDs are combined together for the entire system and compared with its observational SED in an iterated procedure to achieve the best fit. Kurucz blanketed models with the measurements of magnitude differences were used to build these SED's. The input physical elements for building these best fitted synthetic SEDs represent adequately enough the elements of the system. These elements are: T\rm effa =6100±50 K, T\rm effb =5940±50 K, log ga=4.01±0.10, log gb=3.98±0.10, Ra=1.93±0.20 R_\odot, Rb=1.83±0.20 R_\odot Mv\rm a=3.26±0.40, Mv\rm b=3.51±0.50, La= 4.63±0.80 L_\odot and Lb= 3.74±0.70 L_\odot depending on new estimated parallax π=12.02 ± 0.60 mas. A modified orbit of the system is built and compared with earlier orbits and the masses of the two components are calculated as Ma =1.35M\odot and Mb=1.25M\odot. Depending on the estimated physical and geometrical elements of the system, which are assured by synthetic photometry, we suggest that the two components are evolved subgiant (F8.5 IV & G0 IV) stars with age of 3.5 Gy formed by fragmentation.