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From multicolor-photometric observations to a guaranteed mass of AL Cas

文献类型：期刊论文

作者Wang, Ya-Hui1,2; Liu, Jin-Zhong2; Lu, Li-Na2,3; Lu, Guo-Liang1
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2019-08-01
卷号19期号:8页码:108
ISSN号1674-4527
关键词stars: binaries: close stars: binaries: eclipsing stars: individual: AL Cassiopeiae
DOI10.1088/1674-4527/19/8/108
产权排序2
英文摘要We utilize the PAdova and TRieste Stellar Evolution Code (PARSEC) combined with photometric observations to determine a guaranteed mass of AL Cas and re-examine its related physical parameters. Multicolor-photometric observations of AL Cas have been performed in 2016 and 2017. We use the Wilson-Devinney (W-D) code to analyze the light curves and find that AL Cas is probably an A-subtype contact binary (f = 35.7 +/- 0.9%) with a mass ratio q = 0.6399 +/- 0.0230 and an effective temperature difference Delta T = 78 K. The mass-radius relation of a higher luminosity component for AL Cas is obtained by two methods: depending on calculation of the Roche lobe (DCRI, method) and depending on calculation of the W-D code (DCWD method). Using this relationship with the PARSEC model, we investigate the component masses of AL Cas as M-1 = 1.19 +/- 0.23 M-circle dot with M-2 = 0.76 +/- 0.18 M-circle dot by the DCRL method and M-1 = 1.22 +/- 0.26 M-circle dot with M-2 = 0.78 +/- 0.20 M-circle dot by the DCWD method. By means of the photometric studies, we examine the related physical properties of AL Cas with the latest findings. We update the orbital period (P-orb = 0.50055593d) of AL Cas according to six new times of light minimum together with those collected from the literature. Meanwhile, the (O - C)(2) curve analysis suggests that the orbital period of AL Cas has a cyclic variation with a period of 81.25 yr and an amplitude of 0.01415 d. This cyclic change would be caused by the light-travel time effect from a third body. A similar mass of the third body (M(3)sin i' = 0.279 M-circle dot) is derived from our two methods.
WOS关键词PARSEC EVOLUTIONARY TRACKS ; ORBITAL PERIOD MODULATION ; ECLIPSING BINARIES ; STELLAR EVOLUTION ; STARS ; ISOCHRONES ; COEFFICIENTS ; CATALOG ; SYSTEMS ; MODELS
资助项目program of the light in China's Western Region (LCWR)[2015-XBQN-A-02] ; National Natural Science Foundation of China[11273051] ; National Natural Science Foundation of China[11661161016] ; Youth Innovation Promotion Association CAS[2018080] ; National Natural Science Foundation of China[11473024] ; National Natural Science Foundation of China[11863005] ; 13th Fiveyear Information Plan of Chinese Academy of Sciences[XXH13503-03-107]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号WOS:000483306400003
源URL[http://ir.xao.ac.cn/handle/45760611-7/3027]  
专题新疆天文台_光学天文与技术应用研究室
光学天文与技术应用研究室_利用南山1米大视场望远镜（NOWT）观测数据的文章
通讯作者Wang, Ya-Hui
作者单位1.Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urtunqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Ya-Hui,Liu, Jin-Zhong,Lu, Li-Na,et al. From multicolor-photometric observations to a guaranteed mass of AL Cas[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(8):108.
APA Wang, Ya-Hui,Liu, Jin-Zhong,Lu, Li-Na,&Lu, Guo-Liang.(2019).From multicolor-photometric observations to a guaranteed mass of AL Cas.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(8),108.
MLA Wang, Ya-Hui,et al."From multicolor-photometric observations to a guaranteed mass of AL Cas".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.8(2019):108.

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来源：新疆天文台

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