2024/09/16 by Михаил Михайлович Ковалев, Zhenwei Li, Kovalev, Mikhail +11 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies
paper · pdf · doi:10.48550/arxiv.2409.09902
openalex publication_date 2024/09/16 · openalex created_date 2024/10/24 · openalex updated_date 2026/08/01
We present a study of the detached eclipsing binary TV~Mon using spectra from the LAMOST medium-resolution survey and ASAS-SN, CoRoT photometry. We apply multiple-epochs spectral fitting to derive RV and spectral parameters. The analysis of eclipses in CoRoT data show the relative sizes of the stellar components and almost edge-on circular orbit. Combining the spectral and photometrical solutions we estimate masses and radii of the components: MA,B=2.063±0.033(\rm stat.)±0.095(\rm syst.),~0.218±0.004(\rm stat.)±0.018(\rm syst.)~M_\odot, RA,B=2.394±0.014,~2.860±0.016~R_\odot. SED analysis and Gaia parallax allow us to get estimation of temperatures T effA,B=7624+194-174,~5184+130-123 K and distance d=907±11 pc. We identify three δ Scuti type pulsation frequencies in the primary component, while we also suspect TV~Mon having a spot activity in the secondary component. This system experienced intensive mass transfer and mass ratio reversal in the past, but currently shows no signs of mass transfer in the spectra. The low mass component will lose its outer envelope and shrink to the helium white dwarf, the mass and orbital period of which are in good agreement with evolutionary models predictions.