Results 11 to 20 of about 48,149 (293)
A Cyclic Thermal Instability in Contact Binary Stars [PDF]
Symposium - International Astronomical Union, 1976 Contact binary stars coupled by a common convective envelope in which the entropy is constant, the Lucy model, are unstable against mass exchange: if either component begins to transfer mass, it will continue to do so. A detailed sequence of models is calculated which follows the thermal evolution of a 2M⊙ contact binary of normal Population I ...
Brian P. Flannery
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Study on the physical parameters of 18 contact binary stars [PDF]
Monthly Notices of the Royal Astronomical SocietyABSTRACT We present the photometric light curve solutions of 18 W Ursae Majoris-type contact binary stars with orbital periods shorter than 0.5 d. This investigation utilized photometric data from the Transiting Exoplanet Survey Satellite, Gaia, and the All Sky Automated Survey for SuperNovae.
Atila Poro +6 more
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Contact binary stars of the W UMa-type as distance tracers [PDF]
New Astronomy Reviews, 2004 IAU Sydney 2003, JD13 Extragalactic Binaries, ed.I.Ribas, uses elsart3 ...
Slavek M Rucinski
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On the properties of contact binary stars [PDF]
Astronomy & Astrophysics, 2004 5 pages, 4 figures, accepted for publication in A& ...
Sz. Csizmadia, P. Klagyivik
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A Catalog of 1022 Bright Contact Binary Stars [PDF]
The Astronomical Journal, 2006 In this work we describe a large new sample of contact binary stars extracted in a uniform manner from sky patrol data taken by the ROTSE-I telescope. Extensive ROTSE-I light curve data is combined with J, H, and K band near-infrared data taken from the Two Micron All-Sky Survey (2MASS) to add color information. Contact binaries candidates are selected
Sara Gettel, M. Geske, Timothy A. McKay
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Origin of the orbital period change in contact binary stars [PDF]
International Journal of Modern Physics E, 2019 The evolution of contact binary star systems in mass asymmetry (transfer) coordinate is considered. The orbital period changes are explained by an evolution in mass asymmetry towards the symmetry (symmetrization of binary system). It is predicted that decreasing and increasing orbital periods are related, respectively, with the nonoverlapping and ...
V. V. Sargsyan +3 more
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The Photometric Amplitude and Mass Ratio Distributions of Contact Binary Stars [PDF]
The Astronomical Journal, 2001 The distribution of the light-variation amplitudes, A(a), in addition to determining the number of undiscovered contact binary systems falling below photometric detection thresholds and thus lost to statistics, can serve as a tool in determination of the mass-ratio distribution, Q(q), which is very important for understanding of the evolution of ...
Slavek M. Rucinski
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The Evolution of Binary Stars into Contact States [PDF]
Space Science Reviews, 1989 AbstractGood-quality empirical results on 62 short-period binary stars recently summarised by Hilditch & Bell (1987) and Hilditch, King & McFarlane (1988) are discussed in terms of evolutionary paths from detached to semi-detached and contact states.
R. W. Hilditch
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A Method of Measuring Gamma-Velocities of Contact Binary Stars [PDF]
International Astronomical Union Colloquium, 1999 AbstractGamma-velocities of bright contact binary stars (VW Cep, SW Lac, AB And, OO Aql) have been computed using cross-correlation. The template spectra were synthesized with a newly developed computer code WGMODEL.
G. Kaszás, J. Vinkó, Gábor Fürész
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Contact binary stars. I - an X-ray survey
The Astrophysical Journal, 1984 X-ray emission from a contact binary star was first detected by the HEAO 1 satellite in 1977. Spectroscopic observations of 44i Boo and VW Cep by IUE established the presence of high-temperature chromospheric and transition region emission lines in the spectra of these stars.
R. G. Cruddace, A. K. Dupree
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