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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…

Reanalyzing contact binaries with space-based photometric data and investigating possible parameter changes can yield accurate samples for theoretical studies. We investigated light curve solutions and fundamental parameters for twenty…

太阳与恒星天体物理 · 物理学 2024-05-30 Ehsan Paki , Atila Poro

We presented the first high-precision, detailed photometric analysis of four W Ursae Majoris (W UMa)-type contact binaries, Linear 10772300, Linear 11150338, Linear 20372537 and DM Cir. In addition to ground-based multiband photometric…

太阳与恒星天体物理 · 物理学 2026-02-16 Elham Sarvari , Atila Poro , Raul Michel , Anna Francesca Pala , Mehmet Tanriver , Ahmet Bulut , Ahmet Keskin , Mark G. Blackford

Multiband photometric investigations for eight binary systems of the W Ursae Majoris (W UMa)-type are presented. Six systems are presented for the first time to analyze their light curves. All the analyzed systems have a temperature below…

太阳与恒星天体物理 · 物理学 2024-01-19 Atila Poro , Mehmet Tanriver , Raul Michel , Ehsan Paki

Based on the eclipsing binary catalog provided by \cite{2022ApJS..258...16P}, 84 totally eclipsing contact binaries with stable light curves were selected. The TESS light curves of these 84 targets were studied using the Physics Of…

太阳与恒星天体物理 · 物理学 2025-06-23 Yani Guo , Kai Li , Liheng Wang , Qiqi Xia , Xiang Gao , Jingran Xu , Jingyi Wang

We present a comprehensive photometric light curve and orbital period analysis of the W UMa-type contact binary EM Tuc. The O-C analysis constructed from all available eclipse timings exhibits a clear upward parabolic trend, indicating a…

太阳与恒星天体物理 · 物理学 2025-12-01 Sepideh Houshiar , Atila Poro , Abbas Abedini , Eduardo Fernández Lajús

We present the TESS and BVRcIc light curves solution of four low mass-ratio contact binary systems TIC 159102550), V1068 Her, MW Pav and TIC 321576458. Except MW Pav, all three systems have been studied for the first time. The period…

太阳与恒星天体物理 · 物理学 2024-06-11 Ahmed Waqas Zubairi , Zhao Ergang , Qian Shengbang , Zhou Xiao , Eduardo Fernández Lajús

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

By cross-matching the eclipsing binary catalog provided by Prsa et al. (2022) with LAMOST medium resolution spectra, we obtained 11 targets. Combining light and radial velocity curves analysis, we have derived accurate physical parameters…

太阳与恒星天体物理 · 物理学 2026-02-23 Yani Guo , Kai Li , Yanke Tang , Xiang Gao , Qiqi Xia , Liheng Wang , Meng Guo

This study broadens our comprehensive investigation of total-eclipse W Ursae Majoris-type contact binaries by analyzing eight additional systems, continuing our previous research. Multiband $BVR_cI_c$ photometric data were obtained at an…

太阳与恒星天体物理 · 物理学 2025-11-25 Atila Poro , Raul Michel , Francisco Javier Tamayo , Mahya Hedayatjoo , Hector Aceves , Fahri Alicavus

We use extensive model grids to estimate the global parameters of four partially-eclipsing W UMa contact binaries near the period cutoff. All four systems consist of K-type main sequence primaries and M-type secondaries that appear…

太阳与恒星天体物理 · 物理学 2023-02-02 Atila Čeki , Olivera Latković

Light curve analysis of W UMa-type contact binary systems using MCMC or MC methods can be time-consuming, primarily because the repeated generation of synthetic light curves tends to be relatively slow during the fitting process. Although…

太阳与恒星天体物理 · 物理学 2025-08-19 Ehsan Paki , Atila Poro , Minoo Dokht Moosavi Rowzati

Photometric observations in V and I bands of six eclipsing binaries at the lower limit of the orbital periods of W UMa stars are presented. Three of them are newly discovered eclipsing systems. The light curve solutions revealed that all…

太阳与恒星天体物理 · 物理学 2015-09-16 Diana P. Kjurkchieva , Dinko P. Dimitrov , Sunay I. Ibryamov

We present the first light curve solution of 6 contact binary systems which are chosen from the ASAS catalog. The photometric elements and the estimated absolute parameters of all systems are obtained with the light curve analyses. We…

太阳与恒星天体物理 · 物理学 2015-10-06 I. Gezer , Z. Bozkurt

With the development of wide-field surveys, a large amount of data on short-period W UMa contact binaries have been obtained. Continuous and uninterrupted light curves as well as high-resolution spectroscopic data are crucial in determining…

This study provides the first comprehensive analysis of eight total-eclipse W Ursae Majoris-type contact binary systems. Ground-based photometric multiband observations were conducted at a Mexican observatory, and new times of minima were…

We present the first detailed multiband (BVR_cI_c and TESS) photometric analysis of the short-period binary EZ Oct. This study combines ground-based observations conducted at a Southern Hemisphere observatory in Argentina with data from the…

太阳与恒星天体物理 · 物理学 2025-12-09 Asma Ababafi , Atila Poro , Mehmet Tanriver , Eduardo Fernández Lajús

The photometric and spectroscopic studies of six contact binaries were performed for the first time. The orbital periods of all the six targets are longer than 0.5d, and we discovered that their mass ratios are smaller than 0.15. So, they…

太阳与恒星天体物理 · 物理学 2025-05-08 Fei Liu , Kai Li , Xiang Gao , Jing-Yi Wang , Xin Xu , Yi-Fan Wang , Cheng-Yu Wu , Mu-Zi-Mei Li , Xing Gao , Guo-You Sun

New CCD photometric observations and their investigation of the W UMa-type binary, V870 Ara, are presented. Light curves of the system were taken through BVI filters from the Congarinni Observatory in Australia. The new ephemeris is…

太阳与恒星天体物理 · 物理学 2021-07-14 Atila Poro , Mark G. Blackford , Fatemeh Davoudi , Amirreza Mohandes , Mohammad Madani , Samaneh Rezaei , Elnaz Bozorgzadeh

This paper selected eight totally eclipsing contact binaries for photometric and spectroscopic studies, spectral data were analyzed by ULySS, and photometric data were analyzed using PHOEBE through MCMC sampling. We used two methods to…

太阳与恒星天体物理 · 物理学 2024-09-17 Li-Heng Wang , Kai Li , Ya-Ni Guo , Jing-Yi Wang , Xiang Gao , Xing Gao , Guo-You Sun
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