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The contact binary V344 Lacertae: is it a triple system? [PDF]
, 2020 The V R I $VRI$ passbands light curves of V344 Lac were presented and analyzed by using the latest version of the W-D code. The observed spectrum reveals that V344 Lac is not an A3 type but would be a later F type star according to the yielded ...
L. Liu +6 more
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Contact tracing of binary stars: Pathways to stellar mergers [PDF]
Astronomy & Astrophysics, 2023 Stellar 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.
J. Henneco, F. Schneider, E. Laplace
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Contact Binaries of Spectral Type O [PDF]
Symposium - International Astronomical Union, 1979 The eclipsing binaries UW CMa, AO Cas, and V729 Cyg have been systems of great interest for over fifty years. The light curves are complex and suffer significant changes on a time scale of months, but the primary attraction of these systems is that both components have O-type spectra; thus they present us with some of the few possibilities for direct ...
Kam-Ching Leung, Donald P. Schneider
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The W-subtype active contact binary PZ UMa with a possible more massive tertiary component [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2019 Two sets of multiple-color ($B, V, R_c, I_c$) light curves of PZ UMa were observed in dependently with the 2.4 meter telescope at the Thai National Observatory and the 1 meter telescope at Yunnan Observatories.
Xiao Zhou, B. Soonthornthum
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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
doaj +1 more source
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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Detection of the lowest mass ratio contact binary in the universe: TYC 3801-1529-1 [PDF]
Astronomy & AstrophysicsThis paper presents the first analysis of the contact binary TYC 3801-1529-1. We observed four sets of multiple bands complete light curves and one set of radial velocity curve of the primary component.
Kai Li +9 more
semanticscholar +1 more source
International Astronomical Union Colloquium, 1983 Abstract:Ultraviolet and X-ray surveys of the W Ursae Majoris type stars are reviewed. These systems exhibit extended coronas and transition regions that are confined close to the optically determined surfaces. Correlations of X-ray activity with period or rotational velocity indicate a turn-over or saturation of emission at the short periods or high ...
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TY Pup: A Low-mass-ratio and Deep Contact Binary as a Progenitor Candidate of Luminous Red Novae [PDF]
Astronomical Journal, 2018 TY Pup is a well-known bright eclipsing binary with an orbital period of 0.8192 days. New light curves in B, V, (RI)C bands were obtained with the 0.61 m reflector robotic telescope (PROMPT-8) at CTIO in Chile during 2015 and 2017.
T. Sarotsakulchai +8 more
semanticscholar +1 more source
Photometric investigation of the contact binary GU Orionis with high metallicity [PDF]
Nippon Tenmon Gakkai obun kenkyu hokoku, 2018 GU Ori was observed with the 1 m telescope at Yunnan Observatories in 2005. To determine its physical properties, the Wilson-Devinney program was used.
Xiao Zhou +7 more
semanticscholar +1 more source