Akademik Veri Yönetim Sistemi
Revista Mexicana De Astronomia Y Astrofisica, cilt.57, ss.363-379, 2021 (SCI-Expanded)
We present accurate physical parameters of the eccentric binary systemV990 Her which has an orbital period ofP= 8.193315±0.000003days using its pho-tometric and spectroscopic data. The physical parameters of the components werederived asTeff1=8000±200K,Teff2=7570±200K,M1=2.01±0.07M,M2=1.83±0.03M,R1=2.22±0.02R,R2=2.12±0.01R,log(L1/L) = 1.25±0.04,log(L2/L) = 1.12±0.05. Our findings revealed that both components are slightlyevolved from the zero-age main sequence with an age of6.3×108years. We esti-mated an apsidal motion with a period ofU= 14683±2936years in the systemand the internal structure constants of the components were derived for the firsttime.