Results 11 to 20 of about 753,723 (234)
On the properties of contact binary stars [PDF]
Astronomy & Astrophysics, 2004 A catalogue of light curve solutions of contact binary stars has been compiled. It contains the results of 159 light curve solutions. Properties of contact binary stars were studied by using the catalogue data. As it is well known since Lucy's (1968a,b)
Binnendijk +22 more
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Symposium - International Astronomical Union, 1976 Observational statements about close and contact binaries are compared with the theoretical consequences of assuming that contact binaries have a common convective envelope. It is concluded that such contact systems cannot be in thermal equilibrium, and that the inefficiency of convective heat transport in the common envelope must be allowed for.
J. Hazlehurst
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Energy Transfer in Contact Binaries [PDF]
Symposium - International Astronomical Union, 1976 The anomalous mass-luminosity relation for the components of a contact binary system is usually explained by postulating strong energy transfer from the primary to the secondary. It has been assumed that the transfer occurs in the common convective envelope surrounding the two stars, but so far the only attempt at a model for the energy transfer has ...
A. P. Moses, R. C. Smith
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The structure of contact binaries [PDF]
Astronomy & Astrophysics, 2004 17 pages, 28 figures, accepted by A& ...
H. Kähler
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Formation of contact in massive close binaries [PDF]
Astronomy & Astrophysics, 2001 We present evolutionary calculations for 74 close binaries systems with initial primary masses in the range 12...25 M_sun, and initial secondary masses between 6 and 24 M_sun. The initial periods were chosen such that mass overflow starts during the core hydrogen burning phase of the primary (Case A), or shortly thereafter (Case B).
S. Wellstein, N. Langer, H. Braun
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Activity of Contact Binaries [PDF]
International Astronomical Union Colloquium, 1983 We discuss observational results for indicators of elevated activity of contact (W UMa-type) binaries. References are made to results for fast rotating single and detached binary (MS) stars: they are discussed in the accompanying paper by Vilhu and Rucinski.
J. Kaluzny +3 more
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Statistical Survey for the Physical Characteristic of Near Contact Binary(NCBs) [PDF]
Journal of Astronomy and Space Sciences, 2005 The absolute dimensions and orbital elements of 66 near contact binaries, collected from literatures, have been analyzed to investigate the physical characteristics of the near contact binaries as well as co-relations among physical parameters.
Kyu-Dong Oh
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The Evolution of a Contact Binary [PDF]
International Astronomical Union Colloquium, 1971 Test calculations have been made to study the effects of central hydrogen depletion, luminosity exchange and mass exchange on the evolution of a contact binary. The Munich Henyey programme was adapted to allow the study of both components in a time-dependent way.The first model considered was that of LUCY (Ap. J.
E. Meyer-Hofmeister, J. Hazlehurst
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The detached-binary channel for the formation of contact binaries [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 The detached-binary channel is an important channel for the formation of contact binaries, according to which a detached binary might evolve into contact by evolutionary expansion of the components, or angular momentum loss through the effect of magnetic braking (MB).
Dengkai Jiang, Zhanwen Han, Lifang Li
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Models for Contact Binaries [PDF]
International Astronomical Union Colloquium, 1971 The well-known problem one has in constructing zero age contact binaries stems from the fact that given two mass values, the ratio of the radii for zero age stellar models differs from that derived from the Roche model (KUIPER 1941). Therefore one cannot achieve contact by adjusting just the distance of the two stars, since if for instance the distance
Peter Biermann, H. C. Thomas
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