Results 41 to 50 of about 48,149 (293)
Mass Ratio Estimates for Overcontact Binaries Using the Derivatives of Light Curves
The Astrophysical Journal, 2023 The photometric mass ratios of eclipsing binaries are usually estimated by light-curve modeling with an iterative method. We propose a new method for estimating the photometric mass ratio of an overcontact binary using the derivatives of a light curve ...
Shinjirou Kouzuma
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Photometric study of the contact binary star V861 Herculis [PDF]
Astronomy & Astrophysics, 2004 First Cousins V(RI)C light curves of the W UMa-type eclipsing variable star V861 Herculis are presented. The system was observed in 2000 and 2003. The light curves obtained at different epochs showed significant deviation from each other. The O'Connell effect was about ∆V = 0.05 mag in 2000 but it vanished in 2003 (except the night of February 22/23 ...
Sz. Csizmadia +3 more
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Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys
The Astronomical Journal, 2023 We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys.
Athanasios Papageorgiou +5 more
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Microwave emission from southern contact-binary stars
The Astronomical Journal, 1993 We report the results of high-sensitivity 4.8 GHz observations of four southern contact-binary stars (AE Phe, YY Eri, RW Dor, and V757 Cen) made with the Australia Telescope Compact Array. None of these stars were detected above a 4σ level of 0.4 mJy.
A. J. Beasley +4 more
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The Astronomical Journal, 2023 High-precision light curves were extracted from TESScut images. Together with APOGEE and LAMOST medium-resolution spectra, a joint study was made for six early K-type contact binary candidates selected unbiasedly with orbital periods around 0.268 day. It
N.-P. Liu +4 more
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The near-contact binary star RZ Dra revisited
New Astronomy, 2011 Abstract This paper presents the absolute parameters of RZ Dra. New CCD observations were made at the Mt. Suhora Observatory in 2007. Two photometric data sets (1990 BV and 2007 BVRI) were analysed using modern light-curve synthesis methods. Large asymmetries in the light curves may be explained in terms of a dark starspot on the primary component ...
Erdem, A. +2 more
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X-Ray and UV Observations of the Contact Binary KIC 9832227
The Astronomical Journal, 2023 We investigate the X-ray and UV emission from the contact binary star KIC 9832227, which was observed with XMM-Newton for one orbital cycle. The binary is detected with an average X-ray luminosity of 3.4 × 10 ^30 erg s ^−1 .
Dirk Pandel, Lawrence A. Molnar
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Space-Based Photometry of Binary Stars: From Voyager to TESS
Universe, 2021 Binary stars are crucial laboratories for stellar physics, so have been photometric targets for space missions beginning with the very first orbiting telescope (OAO-2) launched in 1968.
John Southworth
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Contact-binary Evolution with Energy Transfer and Saturated Magnetic Braking
The Astrophysical JournalThe evolution of low-mass contact binaries is influenced by angular momentum loss, mass and energy transfer (ET), and the nuclear evolution of the components.
Matthias Fabry, Andrej Prša
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Tracking Motor Progression and Device‐Aided Therapy Eligibility in Parkinson's Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To characterise the progression of motor symptoms and identify eligibility for device‐aided therapies in Parkinson's disease, using both the 5‐2‐1 criteria and a refined clinical definition, while examining differences across genetic subgroups.
David Ledingham +7 more
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