Tidally trapped pulsations in a close binary star system discovered by TESS [PDF]
Nature Astronomy, 2020 It has long been suspected that tidal forces in close binary stars could modify the orientation of the pulsation axis of the constituent stars. Such stars have been searched for, but until now never detected.
G. Handler +16 more
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Multifilter Time-series Observations of Eleven Blue Short-period ATLAS Variable Stars
The Astronomical Journal, 2023 Eleven periodic variable stars were observed photometrically through two to four filters from the set UBVR _C I _C . Phase-folded data for each star cover full cycles of variation.
C. Koen, V. Schaffenroth, A. Kniazev
doaj +1 more source
From a Dinuclear System to Close Binary Cosmic Objects
Astronomy, 2023 Applying the ideas from microscopic objects to macroscopic stellar and galactic systems, the evolution of compact di-stars and di-galaxies is studied in the mass asymmetry coordinate. The formation of stable binary systems is analyzed.
G. G. Adamian +3 more
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ELM of ELM-WD: An Extremely-low-mass Hot Star Discovered in LAMOST Survey
The Astronomical Journal, 2023 The extremely-low-mass white dwarfs (ELM WDs) and pre-ELM WDs are helium-core white dwarfs with mass
Hailong Yuan (袁海龙) +9 more
doaj +1 more source
Close binary central stars and the abundance discrepancy - new extreme objects [PDF]
Proceedings of the International Astronomical Union, 2016 Recent work (Corradi et al. 2015; Jones et al. 2016) has shown that the phenomenon of extreme abundance discrepancies, where recombination line abundances exceed collisionally excited line abundances by factors of 10 or more, seem to be strongly ...
R. Wesson +4 more
semanticscholar +1 more source
The close binary fraction as a function of stellar parameters in APOGEE: a strong anticorrelation with α abundances [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We use observations from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey to explore the relationship between stellar parameters and multiplicity.
C. Mazzola +22 more
semanticscholar +1 more source
POSYDON: A General-purpose Population Synthesis Code with Detailed Binary-evolution Simulations
The Astrophysical Journal Supplement Series, 2023 Most massive stars are members of a binary or a higher-order stellar system, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical laboratories for the
Tassos Fragos +24 more
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Adiabatic Mass Loss in Binary Stars. III. From the Base of the Red Giant Branch to the Tip of the Asymptotic Giant Branch [PDF]
Astrophysical Journal, 2020 The distinguishing feature of the evolution of close binary stars is the role played by the mass exchange between the component stars. Whether or not the mass transfer is dynamically stable is one of the essential questions in binary evolution.
H. Ge +3 more
semanticscholar +1 more source
THE CLOSE BINARY FREQUENCY OF WOLF–RAYET STARS AS A FUNCTION OF METALLICITY IN M31 AND M33 [PDF]
Proceedings of the International Astronomical Union, 2014 Massive star evolutionary models generally predict the correct ratio of WC-type and WN-type Wolf–Rayet stars at low metallicities, but underestimate the ratio at higher (solar and above) metallicities. One possible explanation for this failure is perhaps
K. Neugent, P. Massey
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Tidally trapped pulsations in binary stars [PDF]
Monthly notices of the Royal Astronomical Society, 2020 A new class of pulsating binary stars was recently discovered, whose pulsation amplitudes are strongly modulated with orbital phase. Stars in close binaries are tidally distorted, so we examine how a star’s tidally induced asphericity affects its ...
J. Fuller +4 more
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