Selected β Cephei pulsators in eclipsing binaries

Çakirli O., Hoyman B., Özdarcan O., BİLİR S.

Monthly Notices of the Royal Astronomical Society, vol.543, no.3, pp.2958-2973, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 543 Issue: 3
  • Publication Date: 2025
  • Doi Number: 10.1093/mnras/staf1623
  • Journal Name: Monthly Notices of the Royal Astronomical Society
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.2958-2973
  • Keywords: binaries: close, binaries: eclipsing, stars: fundamental parameters, stars: oscillations, stars: variables: general
  • Istanbul University Affiliated: Yes

Abstract

We present a comprehensive analysis of five eclipsing binary systems containing Cephei-Type pulsating components. These systems were identified using high-precision Transiting Exoplanet Survey Satellite photometry and complemented by high-resolution spectroscopic data from multiple instruments (e.g. HARPS, FEROS, UVES). For each target, we derived fundamental parameters including masses, radii, effective temperatures, and metallicities through a combined analysis of light curves and radial velocity data. The atmospheric parameters were determined via spectral disentangling and Markov Chain Monte Carlo-based fitting techniques. Absolute parameters were used to position components on the Hertzsprung-Russell diagram, and evolutionary status was assessed using mesa/MIST stellar tracks. Frequency analysis revealed multiple significant pulsation modes in all systems. Our study increases the number of well-characterized Cephei pulsators in binaries and provides high-precision benchmarks for stellar evolution and asteroseismology.