Mass-transfer in close binary and their companions

11th Pacific Rim Conference on Stellar Astrophysics: Physics and Chemistry of the Late Stages of Stellar Evolution

物理学;天文学

Liao, Wenping^1,2 ; Qian, Shengbang^1,2,3 ; Zhu, Liying^1,2,3 ; Li, Linjia^1

Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming

650216, China^1

Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming

650216, China^2

University of the Chinese Academy of Sciences, Yuquan Road 19#, Beijing

100049, China^3

关键词: Binary systems;    Formation and evolutions;    Geometrical structure;    Light curves;    Light travel;    Orbital periods;    Secular variation;    Ultraviolet telescopes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/728/7/072020/pdf
DOI  :  10.1088/1742-6596/728/7/072020

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Secular and/or cyclical orbital period variations of close binaries can be derived by analyzing the (O-C) diagram. The secular variations are usually explained as mass transfer between components, while the most plausible explanation of the cyclic period changes is the light-travel time effect (LTTE) through the presence of a third body. Mass transfer and additional companions in close binary systems are important for understanding the formation and evolution of the systems. Here, UV light curves of several close binaries based on the Lunar-based Ultraviolet Telescope (LUT) observations are presented and analyzed with the Wilson-Devinney (W-D) method. Then, based on those light-curve solutions and new analysis of the orbital period variations, the multiplicity, geometrical structure and evolution state of targets are discussed.