Results 231 to 240 of about 166,748 (261)

The round chroms of contact binaries

Astrophysics and Space Science, 2003
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Contact Binaries: The Current State

AIP Conference Proceedings, 2010
Lucy’s model of contact binaries has been serving well since its development in 1968 as an excellent conceptual framework for internal structure and evolution studies of the W UMa type stars. Its over‐constrained structural demands were recognized early, but—from the observational point of view—it was particularly appealing in its ability to explain W ...
Slavek Rucinski, Vicky Kologera, Marc van der Sluys   +2 more
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Near-Contact Binary Stars

1990
A group of close binary stars named near-contact binaries is defined. They are divided according to their physical characteristics into to two subclasses: V1010 Ophiuchi binaries and FO Virginis binaries. A list of members of the group, their current observational status, and their physical and evolutionary relationship to W Ursa-Majoris binaries is ...
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KR Cygni: a near-contact eclipsing binary?

Astrophysics and Space Science, 2004
In this study we present photometric observations of the eclipsing binary KR Cyg made in 1999 and 2000. The observations of the eclipsing binary KR Cyg have been carried out in B, V and R colours at the Ege University Observatory. A new seasonal light curves are presented. New times of minima and ephemerides are given.
Sipahi, E, Gulmen, O
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Nearly Contact Binary HD 17514

1969
This system was discovered in 1967 at the Crimean Observatory. Light and radial velocity curves were obtained. The star is an eclipsing binary with elliptical components. The masses of the components are 48 and 13.5 9JIq, the stars almost fill the Roche’s surface.
V. I. Burnashov, E. A. Vitrichenko
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Evolutionary stage of contact binaries

Chinese Astronomy and Astrophysics, 1988
A new method of estimating the evolutionary stage reached by a contact binary from its observations is proposed. Application to 38 systems shows that all systems of subtype A and some systems of subtype W are evolved systems, from systems which may or may not be contact systems at the zero-age main-sequence stage.
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Multiplicity of Contact Binary Stars

2007
We present results of a preliminary investigation of triple star incidence for contact binary stars. The goal is to shed light on the possible role of distant companions which may have acquired and/or absorbed AM during evolution of multiple systems facilitating or enabling formation of contact binaries.
T. Pribulla, S.M. Rucinski
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The contact binary HD 101799.

Publications of the Astronomical Society of the Pacific, 1976
The observations of Sistero and Sistero are reanalyzed. HD 101799 is found to be a contact system instead of semidetached as reported previously. New absolute dimensions for the components are derived. The secondary (less massive component) is found to be cooler and larger than believed earlier. Based on the size of the radius of the primary the binary
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Activity of Contact Binary Systems

1985
This review will consider various indicators of activity in contact binaries. We shall limit ourselves to late-type contact systems which are traditionally called the “W UMa-type” systems. This limitation results mainly from a better knowledge of properties of cooler systems (i.e.
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Machine-learning-assisted design of a binary descriptor to decipher electronic and structural effects on sulfur reduction kinetics

Nature Catalysis, 2023
Tianshuai Wang, Tao Shengyu
exaly