Open AccessTHE FIRST DETAILED ANALYSIS ON THE ASTROPHYSICAL PROPERTIES OF THE ECCENTRIC BINARY V990 HER
Author(s) -
Evrim Kıran,
V. Bakış,
H. Bakış,
Ö. L. Deǧirmenci
Publication year - 2021
Publication title -
revista mexicana de astronomía y astrofísica
Language(s) - English
Resource type - Journals
ISSN - 0185-1101
DOI - 10.22201/ia.01851101p.2021.57.02.09
Subject(s) - physics , apsidal precession , binary number , astrophysics , eccentric , orbital period , binary system , binary star , sequence (biology) , stars , planet , arithmetic , genetics , mathematics , quantum mechanics , biology
We present accurate physical parameters of the eccentric binary system V990 Her which has an orbital period of P=8.193315±0.3 days using its photometric and spectroscopic data. The physical parameters of the components were derived as Teff1=8000±200 K, Teff2=7570±200 K, M1=2.01±0.07 Mʘ, M2=1.83±0.03 Mʘ, R1=2.22±0.02 Rʘ, R2=2.12±0.01 Rʘ, log(L1/Lʘ)=1.25±0.04, log(L2/Lʘ)=1.12±0.05. Our findings revealed that both components are slightly evolved from the zero-age main sequence with an age of 6.3×108 years. We estimated an apsidal motion with a period of U=14683±2936 years in the system and the internal structure constants of the components were derived for the first time.