Year: 2025
Type: article
Abstract: Using high-precision photometric data from the Transiting Exoplanet Survey Satellite, medium-resolution spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopy Telescope, and long-term eclipse timings, we provide orbital parameters for two early-type detached eclipsing binary systems: TYC 3740-2072-1 and TYC 2888-780-1, and analyze the orbital period variations and evolutionary status of these two targets. TYC 3740-2072-1, with a spectral type of B1V, consists of a 6.914 M ⊙ subgiant and a 6.233 M ⊙ main-sequence component. It is expected to evolve into a semidetached binary, potentially serving as a progenitor of a Type Ia supernova. TYC 2888-780-1 has a spectral type of A3 and consists of two main-sequence components with masses of 1.682 and 1.673 M ⊙, respectively. It is undergoing stable evolution. Through eclipse timing analysis, we find that both targets exhibit apsidal motion effects, with observed apsidal motion rates of ω ̇ obs = 0.0412 deg cycle − 1 and ω ̇ obs = 0.0205 deg cycle − 1 , respectively. Additionally, TYC 2888-780-1 exhibits orbital period variations, which we attribute to the light travel time effect caused by a third body; the minimum mass of this third body is estimated to be 0.598 M ⊙.
Source: The Astrophysical Journal
Authors: Pengfei Ye, Kai Li, Fei Liu, Xiang Gao, Jing-Yi Wang
Institution: Institute of Space Sciences
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Aeronautics and Space Administration, Shandong University, Space Telescope Science Institute, European Space Agency, National Natural Science Foundation of China, Chinese Academy of Sciences, National Development and Reform Commission, National Astronomical Observatories, Chinese Academy of Sciences
OpenAlex ID: W4411908849