The Fundamental Parameters and Evolutionary Status of V454 Aurigae
arxiv(2024)
摘要
Eclipsing binary systems have a unique feature, which enables scientists to
obtain precise fundamental star parameters, which opens to greater area of
astrophysics studies. In this study, we have derived the fundamental
parameters, the evolutionary status, and the birthplace of V454 Aur in the
Galaxy by combining radial velocity, photometric, and spectral energy
distribution data. We have updated ephemerides and period of V454 Aur as
2458850.80136_-0.00001^ +0.00001 and
27.0198177_-0.0000003^ +0.0000003, respectively. We obtain
1.173^ +0.016_-0.016 M_⊙ and 1.203^ +0.022_-0.026 R_⊙
for the primary component and 1.045^ +0.015_-0.014 M_⊙ and
0.993^ +0.034_-0.027 R_⊙ for the secondary component. The
effective temperatures for the components are accurately determined via SED
data as 6250^ +150_-150 K and 5966^ +109_-89 K for the primary
component and the secondary component, respectively. The metallicity of the
components is derived from evolutionary tracks, which implies slightly higher
than Solar metallicity. According to analysis, the components of V454 Aur are
on the main sequence. Our distance calculation for the system is, which is
65.07^ +2_-3 pc, in excellent agreement with Gaia astrometric
data, which is 65.07^ +0.09_-0.09 pc. The current age of the system is
1.19_-0.09^ +0.08 Gyr, and it will start to mass transfer between
components in 5 Gyr from now on. Dynamical orbital analysis shows that V454 Aur
follows a boxy pattern around the Galactic centre and is a member of the
thin-disc component of the Galaxy. Considering the age and metallicity of this
system, it was found to have formed just outside the Solar circle.
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