Wide binary stars with non-coeval components
Open Astronomy, 2022 We have the estimated masses of components of visual binaries from their spectral classification. We have selected pairs in which the less massive component looks more evolved. Spectral observations of some of these pairs were made, and at least one pair,
Malkov Oleg, Kniazev Alexey
doaj +2 more sources
Born to Be Wide: The Distribution of Wide Binaries in the Field and Soft Binaries in Clusters
The Astrophysical Journal, 2023 Most stars, binaries, and higher-multiplicity systems are thought to form in stellar clusters and associations that later dissociate. Very wide binaries can be easily disrupted in clusters due to dynamical evaporation (soft binaries) and/or tidal ...
Mor Rozner, Hagai B. Perets
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Hot Subdwarf Stars Identified in LAMOST DR8 with Single-lined and Composite Spectra
The Astrophysical Journal, 2023 A total of 222 hot subdwarf stars were identified with LAMOST DR8 spectra, among which 131 stars show composite spectra and have been decomposed, while 91 stars present single-lined spectra.
Zhenxin Lei +8 more
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Chemical Homogeneity of Wide Binary Systems: An Approach from Near-Infrared Spectroscopy
The Astronomical Journal, 2023 Wide binaries, with separations between the two stars from a few au to more than several thousand au, are valuable objects for various research topics in Galactic astronomy.
Dongwook Lim +4 more
doaj +1 more source
Internal Calibration of LAMOST and Gaia DR3 GSP-Spec Stellar Abundances
The Astrophysical Journal, 2023 Stellar chemical abundances are crucial and fundamental in astrophysics. However, they could suffer from substantial systematic errors according to several investigations but still lack calibrations in bulk.
Zexi Niu, Haibo Yuan, Jifeng Liu
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Testing White Dwarf Age Estimates Using Wide Double White Dwarf Binaries from Gaia EDR3
The Astrophysical Journal, 2022 White dwarf (WD) stars evolve simply and predictably, making them reliable age indicators. However, self-consistent validation of the methods for determining WD total ages has yet to be widely performed.
Tyler M. Heintz +6 more
doaj +1 more source
Wide-binary Stars Formed in the Turbulent Interstellar Medium
The Astrophysical Journal Letters, 2023 The ubiquitous interstellar turbulence regulates star formation and the scaling relations between the initial velocity differences and the initial separations of stars.
Siyao Xu +3 more
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The Evolution of Population III and Extremely Metal-poor Binary Stars
The Astrophysical Journal, 2023 Numerical simulations have now shown that Population III (Pop III) stars can form in binaries and small clusters and that these stars can be in close proximity to each other.
Sung-Han Tsai +4 more
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Weighing the Darkness. II. Astrometric Measurement of Partial Orbits with Gaia
The Astrophysical Journal, 2023 Over the course of several years, stars trace helical trajectories as they traverse across the sky due to the combined effects of proper motion and parallax.
Jeff J. Andrews +4 more
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Investigation Limb darkening for short period AB Andromeda eclipsing binary star
Polytechnic Journal, 2023 This work deal with characterizing the limb darkening coefficients for the short period binary stars AD Andromeda to determine the size, luminosities and masses of the Individual stars as well as orbital size and orientation of the binary system ...
Chiman Ibrahim Hussein
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