000007801 001__ 7801
000007801 005__ 20260113124039.0
000007801 037__ $$aSCART-2026-0054
000007801 100__ $$aEze, Christian I.
000007801 245__ $$aOrbital and stellar parameter determination of eclipsing β Cep pulsators
000007801 260__ $$c2026
000007801 520__ $$aEclipsing binaries are veritable laboratories for the study of stellar structure and evolution. The dynamical properties (e.g. mass and radius) inferred from eclipsing binary modelling coupled with asteroseismic masses offer a unique opportunity to probe stellar evolution models. Spectroscopy characterises the stellar envelope and plays a key role in estimating more accurate dynamical parameters, as it provides invaluable priors for the eclipsing light curve modelling. In this paper, 13 apparently eclipsing single-lined spectroscopic binaries with massive primary components are spectroscopically analysed to derive the orbital and stellar parameters, and infer the possible relation between orbital and stellar parameters. The systems were observed using SALT HRS, HERMES, CHIRON and a spectrograph at Skalnate Pleso Observatory (SPO). The radial velocities are estimated, orbital elements are fitted, atmospheric solutions are measured, and absolute parameters are derived. The rotation as well as circularisation and synchronisation of the systems are also investigated and the general properties of the sample are discussed. The sample shows 1 slow rotator, 3 circularised and synchronised fast rotating systems, as well as 6 circular and 3 eccentric systems with asynchronous fast rotation. They have a primary mass range of 8.7(9) M to 15.6(9) M and effective temperature of 22000(1000) K to 28000(1000) K. The secondary components appear to cut across a wide mass spectrum ranging from low-mass to intermediate mass systems. The eccentricity of the systems shows certain trends with the projected rotational velocity (v sin i) although there is no universal correlation between them. Also, there could be circularisation without co-rotation or synchronisation even for circularised short-period close binary systems
000007801 594__ $$aNO
000007801 6531_ $$aBinaries: eclipsing
000007801 6531_ $$aBinaries: spectroscopic
000007801 6531_ $$aStars: massive
000007801 700__ $$aHandler, Gerald
000007801 700__ $$aKahraman Aliçavuş, Filiz
000007801 700__ $$aPawar, Tilaksingh
000007801 700__ $$aDe Cat, Peter
000007801 773__ $$pAstronomy & Astrophysics$$y2026
000007801 8560_ $$fpeter.decat@ksb-orb.be
000007801 905__ $$asubmitted to
000007801 980__ $$aREFERD