Photometric and Spectroscopic Study of Ten Low Mass Ratio Contact Binary Systems: Orbital Stability, O'Connell Effect and Infrared Calcium Line Filling
作者机构：School of ScienceWestern Sydney University Department of ElectronicsElectrical Engineering and MicroelectronicsSilesian University of Technology Instituto de Astronomía Astronomical Observatory
出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究)
年 卷 期：2024年第24卷第8期
页 面：214-224页
核心收录：
学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学]
基 金：support by the Astronomical station Vidojevica,funding from the Ministry of Science,Technological Development and Innovation of the Republic of Serbia (contract No.451-03-66/2024-03/200002) by the EC through project BELISSIMA (call FP7-REGPOT-2010-5,No.265772) financed by Silesian University of Technology Statutory Activities grant No.BK-250/RAu-11/2024
主 题：(stars:) binaries: eclipsing techniques: photometric stars: chromospheres LIGHT-CURVE SOLUTION TRIPLET EXPLANATION UNIQUENESS
摘 要：Low mass ratio contact binary systems are more likely to have unstable orbits and potentially *** addition,such systems exhibit characteristics such as starspots and high energy emissions (UV) suggestive of chromospheric and magnetic *** curve modeling of ten contact binary systems is *** were found to be of extreme low mass ratio ranging from 0.122 to 0.24 and three were found to be potentially unstable and possible merger *** of the infrared calcium absorption lines is a marker of increased chromospheric *** use the available Large Sky Area Multi-Object Fiber Spectroscopic Telescope spectra along with matched standard spectra (broadened for rotation) to measure the excess filling of the central core depression flux of the two main infrared calcium absorption linesλ8542 andλ*** find that all reported contact binaries have excess filling of the core flux in the infrared calcium *** of the systems reported were also observed by the Galaxy Evolution Explorer mission and we find that all three have features of excess ultraviolet emissions further adding evidence for increased chromospheric activity in low mass ratio contact *** of both orbital stability and absorption line filling is dependent on the determination of geometric and absolute parameters from light curve *** an insignificant number of contact binary light curves exhibit the O’Connell effect,usually attributed to *** discuss the inclusion of starspots in light curve solutions and how they influence the geometric and absolute parameters.
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