Non-synchronous rotations in massive binary systems
نویسندگان
چکیده
Context. The OWN Survey has detected several O-type stars with composite spectra whose individual components show very different line broadening. Some of these have been revealed as binary systems are asynchronous. This fact may be related to the processes acting in (e.g., angular-momentum transfer, tidal forces, etc.) or origin binaries themselves. Aims. We aim determine orbital and physical parameters massive star HD 96264A order confirm its nature constrain evolutionary status stellar components. Methods. computed spectroscopic orbit system based on radial velocity analysis 37 high-resolution, high-S/N, multi-epoch optical spectra. disentangled spectrum determined properties using FASTWIND models incorporated IACOB-GBAT tool. also a set estimate age explore evolution. Results. is composed an O9.2 IV primary B0 V(n) secondary, minimum masses 15.0 ± 0.5 M ⊙ 9.9 0.4 , respectively, wide eccentric ( P = 124.336 0.008 d; e 0.265 0.005). secondary projected rotational velocities (∼40 ∼215 km s −1 respectively), derived through quantitative analyses include ∼20.5 16.8 respectively. indicate approximate 4.5 Myr for both pair, corresponding current radii 26.0 10.8 R primary, 17.9 7.0 secondary. Conclusions. youth that non-synchronous consequence formation process rather than circumstance should accounted theories formation.
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2021
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202039970