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The light curve analyses and orbital period variations for two contact binary stars, LS Del and V997 Cyg, were presented in this work which was conducted in the frame of the Binary Systems of South and North (BSN) Project. Ground-based…

We use the idea of repeat measurement to determine the mean value and error of light curve solution parameters of contact binaries. Our simulation is realized by the Monte Carlo algorithm and Wilson-Devinney code. This method can obtain the…

太阳与恒星天体物理 · 物理学 2021-09-08 Liang Liu

We present light curve solutions of the W UMa-type eclipsing binary OGLE-GD-ECL-04451, observed by both the \emph{Optical Gravitational Lensing Ex-periment} (\emph{OGLE}) program in 2006 and the \emph{Antarctica Survey Telescope}…

太阳与恒星天体物理 · 物理学 2016-02-05 Li Gang , Zhang yanping , Fu jianning

The $B$ $V$ $R_c$ $I_c$ bands light curves of the newly discovered binary system \astrobj{GSC 03122-02426} are obtained and analyzed using the Wilson-Devinney (W-D) code. The solutions suggest that the mass ratio of the binary system is $q…

太阳与恒星天体物理 · 物理学 2016-08-04 X. Zhou , S. -B. Qian , J. -J. He , J. Zhang , B. Zhang

High precision CCD observations of six totally eclipsing contact binaries were presented and analyzed. It is found that only one target is an A-type contact binary (V429 Cam), while the others are W-type contact ones. By analyzing the times…

太阳与恒星天体物理 · 物理学 2021-06-23 Kai Li , Qi-Qi Xia , Chun-Hwey Kim , Xing Gao , Shao-Ming Hu , Di-Fu Guo , Dong-Yang Gao , Xu Chen , Ya-Ni Guo

In this work, we present a detailed investigation of five contact binary systems of the W Ursae Majoris (W UMa) type. Multiband photometric observations were conducted using ground-based telescopes in both the northern and southern…

We present a multi-band photometric analysis of CRTS J163819.6+03485, the first low mass ratio (LMR) contact binary system with a period under the contact binary (CB) period limit. The unprecedented combination of mass ratio and period…

太阳与恒星天体物理 · 物理学 2023-08-02 A. Papageorgiou , P. -E. Christopoulou , E. Lalounta , C. E. Ferreira Lopes , M. Catelan , A. J. Drake , P. Xantzios , I. Alikakos

We presented the first photometric light curve solutions of four W Ursae Majoris (W UMa)-type contact binary systems. This investigation utilized photometric data from the Transiting Exoplanet Survey Satellite (TESS) and Gaia Data Release 3…

太阳与恒星天体物理 · 物理学 2025-02-20 Atila Poro , Razieh Aliakbari , Hossein Azarara , Asma Ababafi , Sadegh Nasirian

We present multi-color light curves for the W UMa-type eclipsing binary TU Boo for two epochs separated by 22 years. An analysis of the O-C diagram indicates the earlier observations took place right in the middle of a major period change,…

天体物理学 · 物理学 2009-11-13 Jeffrey L. Coughlin , Horace A. Dale , Richard M. Williamon

We present detailed analyses of updated eclipse timing diagrams for 32 contact binary merger candidates in the Galactic bulge. The photometric data was obtained from 2016 to 2021 using the Korea Microlensing Telescope Network (KMTNet) with…

太阳与恒星天体物理 · 物理学 2025-03-25 Kyeongsoo Hong , Jae Woo Lee , Dong-Jin Kim , Jang-Ho Park , Hye-Young Kim , Pakakaew Rittipruk , Cheongho Han

A study of late-type low-mass eclipsing binaries provides us with important information about the most common stars in the Universe. We obtain the first light curves and perform period analyses of two neglected eclipsing binaries GK Boo and…

太阳与恒星天体物理 · 物理学 2012-01-25 P. Zasche , P. Svoboda , R. Uhlar

New CCD photometric light curves of short period (P=0.285d) eclipsing binary RW Dor are presented. The observations performed with the PROMPT-8 robotic telescope at CTIO in Chile from March 2015 to March 2017. The other eclipse timings were…

Photometric analysis of $BVR_C$ light curves of newly discovered eclipsing binary GSC 0008-00901 is presented. The orbital period is improved to 0.28948(11) days. Photometric parameters are determined, as well. The analysis yielded to…

天体物理学 · 物理学 2008-11-26 S. Parimucha , T. Pribulla , M. Vaňko , P. Dubovsky , L. Hambalek

In this paper, we present the first light curve synthesis and orbital period change analysis of nine contact binaries around the short period limit. It is found that all these systems are W-subtype contact binaries. One of them is a medium…

太阳与恒星天体物理 · 物理学 2020-04-15 Kai Li , Chun-Hwey Kim , Qi-Qi Xia , Raul Michel , Shao-Ming Hu , Xing Gao , Di-Fu Guo , Xu Chen

Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for ten close binary systems: OO Aql, CC Com, V345 Gem, XY Leo, AM Leo, V1010 Oph, V2612 Oph, XX Sex, W UMa, and XY UMa. Most of these…

The Tarleton Observatory's 0.8m telescope and CCD photometer were used to obtain 1298 observations of the short period eclipsing binary star MW And. The observations were obtained in Johnson's BVR filters. The light curves show that MW And…

太阳与恒星天体物理 · 物理学 2018-08-21 Ahmed Waqas Zubairi , Shaukat Goderya , Fazeel Mahmood Khan

New CCD photometry during 4 successive years from 2005 is presented for the eclipsing binary GW Cep, together with reasonable explanations for the light and period variations. All historical light curves, obtained over a 30-year interval,…

太阳与恒星天体物理 · 物理学 2015-05-14 Jae Woo Lee , Jae-Hyuck Youn , Wonyong Han , Chung-Uk Lee , Seung-Lee Kim , Ho-Il Kim , Jang-Ho Park , Robert H. Koch

We present the first photometric analysis for the newly discovered eclipsing binary systems of Algole-type GSC 2750-0054 and GSC 03208-02644. Our analysis was carried out by means of the most recent version of Wilson Devinney (WD) code,…

太阳与恒星天体物理 · 物理学 2016-06-29 M. M. Elkhateeb , M. I. Nouh

This study presents new, high-quality, optical photometric observations of three W UMa type contact binaries. The analysis of the corresponding light curves is made using Djurasevic's inverse problem method. To explain the light curve…

太阳与恒星天体物理 · 物理学 2025-07-02 Marko Grozdanović , Gojko Đurašević

A sample of bright contact binary stars (W UMa-type or EW, and related: with beta Lyr light curves, EB, and ellipsoidal, ELL - in effect, all but the detached, EA), to the limit of Vmax = 7.5 magnitude is deemed to include all discoverable…

天体物理学 · 物理学 2009-11-07 Slavek M. Rucinski