Results 21 to 30 of about 2,489,433 (294)
Photometric Solutions of W UMa Type Stars: GSC2576-0319 and GSC2584-1731 [PDF]
Journal of Astronomy and Space Sciences, 2006 High-precision photometric observations were performed in BVI bandpasses using 1m robotic telescope at Mt. Lemmon Observatory for two binary stars, which are reclassified as W UMa-type systems from ROTSE(Robotic Optical Transient Search Experiment ...
Chung-Uk Lee, Jae Woo Lee, Chun-Hwey Kim
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Small Mass Ratio Contact Binary GR Vir and HV Aqr [PDF]
Journal of Astronomy and Space Sciences, 2004 The absolute dimensions of low mass contact binary, GR Vir and HV Aqr were obtained using WD program from the published spectroscopic and photometric observational data.
Kyu-Dong Oh +4 more
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Determinations of its Absolute Dimensions and Distance by the Analyses of Light and Radial-Velocity Curves [PDF]
Journal of Astronomy and Space Sciences, 2004 We completed the light curves of the contact binary CK Boo for 13 nights from June to July in 2004 using the 1-m reflector and BVR filters at Mt. Lemmon Optical Astronomy Observatory, and determined four new times of minimum light (three timings for ...
Jae Woo Lee +4 more
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Determinations of its Absolute Dimensions and Distance by the Analyses of Light and Radial-Velocity Curves of the Contact Binary -I. V417 Aquilae [PDF]
Journal of Astronomy and Space Sciences, 2004 New photometric and spectroscopic solutions of W-type overcontact binary V417 Aql were obtained by solving the UBV light curves of Samec et al. (1997) and radial-velocity ones of Lu & Rucinski (1999) with the 2003 version of the Wilson-Devinney binary ...
Jae Woo Lee +3 more
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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.
S.M. Rucinski, O. Vilhu, J. Kaluzny
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Evaluating the Performance of Wearable Devices for Contact Tracing in Care Home Environments [PDF]
, 2023 COVID-19 has had a devastating impact worldwide, including in care homes where there have been substantial numbers of cases among a very vulnerable population.
Kemp, A.H. +4 more
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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.
J. Hazlehurst, E. Meyer-Hofmeister
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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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Detection and Seismic Study of Gravity and Rossby Mode Pulsations in Four Contact Binaries
The Astrophysical Journal, 2023 We report the detection of gravity ( g ) and Rossby ( r ) mode pulsations of four short-period eclipsing binaries, KIC 5439790, KIC 7501230, KIC 9350889, and KIC 9453192 based on the 4 yr Kepler high-precision photometry.
X. B. Zhang +3 more
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Symposium - International Astronomical Union, 1986 The most promising mechanism for the formation of contact binaries involves the orbital angular momentum loss (AML) and the resulting orbital decay of detached but close synchronized binaries. The efficiency of magnetic wind braking should abruptly decrease upon formation of a contact binary because of the transformation into a system of earlier ...
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