Results 231 to 240 of about 4,122 (255)

Liminosity distribution function for visual binary stars

Astrophysics and Space Science, 1985
The ‘cosmic scatter’ of 147 of the best known visual binary stars on the Main Sequence is discussed and a new estimation of the luminosity distribution function for multiple star systems is presented. As long as the mass ratio q of a close binary is not smaller than 0.5, the distribution of close binary components is identical to the van Rhijn ...
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Evaluation of Binary Star Formation Models Using Well-Observed Visual Binaries

2019
Creation of the Galaxy model describing formation and evolution of binary stars requires generating and testing hypotheses related to the process of formation of binary stars and distributions of their characteristics. A set of hypotheses can be generated on the basis of a number of publications that suggested the formation of binary systems.
Oleg Malkov, Dmitry Chulkov, Yikdem Gebrehiwot, Dana Kovaleva, Nikolay A. Skvortsov, Alexey Sytov, Solomon Belay Tessema, Alexander Tutukov, Lev Yungelson   +8 more
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Orbits of Ten Visual Binary Stars

Chinese Journal of Astronomy and Astrophysics, 2007
We present the orbits of ten visual binary stars: WDS 01015+6922, WDS 01424–0645, WDS 01461+6349, WDS 04374–0951, WDS 04478+5318, WDS 05255–0033, WDS 05491+6248, WDS 06404+4058, WDS 07479–1212, and WDS 18384+0850. We have also determined their masses, dynamical parallaxes and ephemerides.
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The Orbital Elements of a Visual Binary Star

2006
Although astronomers regard the brighter component as fixed and map the motion of the fainter one around it, in reality, both stars in a binary system move in ellipses around the common centre of gravity. The size of the ellipse is inversely proportional to the mass of the star, so in the Sirius system, for instance, the primary has a mass of 2.1 sun ...
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Improved orbit for the visual-binary star 40/41 Dra

Astrophysics, 2012
Families of orbits of the visual binary star 40/41 Dra (ADS 11061), a near-polar visual binary star (αJ2000 =18h00m; δJ2000; δJ2000 = +80°00′ ) which is a wide pair in the neighborhood of the sun ( πt = 19mas ), are calculated. Both components are spectrally binary and belong to the late spectral classes K2V and F7.
A. A. Afanasyeva, E. A. Grosheva
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Orbital Elements of visual binary stars with very short arcs: With application to double stars from the 1829 southern double star catalog of James Dunlop

Astronomische Nachrichten, 2022
Carolyn J Brown, Graeme L White, Roderick R Letchford   +2 more
exaly  

THE MASSES OF VISUAL BINARY STARS

Publications of the Astronomical Society of the Pacific, 1919
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Visual binary stars with known orbits in Gaia EDR3

Monthly Notices of the Royal Astronomical Society, 2022
Dmitry Chulkov, Oleg Yu. Malkov
exaly  

Masses of Visual Binary Stars

Annual Review of Astronomy and Astrophysics, 1967
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A New Visual Binary Star

Publications of the Astronomical Society of the Pacific, 1933
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