Results 11 to 20 of about 2,677,677 (287)
On the properties of contact binary stars [PDF]
Astronomy and Astrophysics, 2004 5 pages, 4 figures, accepted for publication in A& ...
Szilárd Csizmadia
exaly +4 more sources
Mass-ratio distribution of contact binary stars [PDF]
Astronomy and Astrophysics, 2023 The mass ratioqof a contact binary star evolves through mass transfer, magnetic braking, and thermal relaxation oscillations to low values until it crosses a critical thresholdqmin. When this occurs, the binary undergoes the tidal Darwin instability, leading to a rapid coalescence of the components and to an observable brightening of the system.
Ondřej Pejcha
exaly +6 more sources
Contact tracing of binary stars: Pathways to stellar mergers
Astronomy and AstrophysicsStellar mergers are responsible for a wide variety of phenomena such as rejuvenated blue stragglers, highly magnetised stars, spectacular transients, iconic nebulae, and stars with peculiar surface chemical abundances and rotation rates. Before stars merge, they enter a contact phase.
Fabian Schneider +2 more
exaly +4 more sources
Minimum mass ratio of contact binary stars
, 2022 Mass ratio $q$ of a contact binary star evolves due to mass transfer, magnetic braking, and thermal relaxation oscillations to small values until it crosses a critical threshold $q_\text{min}$. When that happens, the binary undergoes the tidal Darwin instability leading to a rapid coalescence of the components and observable brightening of the system ...
Milan Pešta, Ondřej Pejcha
openaire +2 more sources
Chromospheric activity in bright contact binary stars [PDF]
Astronomy and Astrophysics, 2020 Context. Studying chromospheric activity of contact binaries is an effective way of revealing the magnetic activity processes of these systems. One efficient but somewhat neglected method for this purpose is to follow the changes of the Hα line profiles via optical spectroscopy. Aims. Our goal is to perform a comprehensive preliminary analysis based on
András Pal +2 more
exaly +5 more sources
A Catalog of 1022 Bright Contact Binary Stars [PDF]
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
Timothy McKay
exaly +3 more sources
A Cyclic Thermal Instability in Contact Binary Stars [PDF]
Astrophysical Journal, 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 Flannery
exaly +2 more sources
Astrophysical Journal, 1981 Densities, corrected primary colors, minimum periods, inferred masses, luminosities, and specific angular momenta are computed from data on 37 W Ursae Majoris systems. A-type systems, having lower densities and angular momenta than the W-type systems, are shown to be evolved, and a new class of contact binary is identified, the OO Aquilae systems ...
exaly +2 more sources
Contact binary stars of the W UMa-type as distance tracers
New Astronomy Reviews, 2004 IAU Sydney 2003, JD13 Extragalactic Binaries, ed.I.Ribas, uses elsart3 ...
Slavek Rucinski
exaly +3 more sources
Contact binary stars. I - an X-ray survey
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.
A K Dupree, R G Cruddace
exaly +2 more sources