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| From multicolor-photometric observations to a guaranteed mass of AL Cas | |
Wang, Ya-Hui1,2 ; Liu, Jin-Zhong2; Lu, Li-Na2,3; Lu, Guo-Liang1
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| 2019-08-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 19Issue:8Pages:108 |
| Contribution Rank | 2 |
| Abstract | 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. |
| Keyword | stars: binaries: close stars: binaries: eclipsing stars: individual: AL Cassiopeiae |
| DOI | 10.1088/1674-4527/19/8/108 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | PARSEC EVOLUTIONARY TRACKS ; ORBITAL PERIOD MODULATION ; ECLIPSING BINARIES ; STELLAR EVOLUTION ; STARS ; ISOCHRONES ; COEFFICIENTS ; CATALOG ; SYSTEMS ; MODELS |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000483306400003 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3028 |
| Collection | 光学天文与技术应用研究室 科研仪器设备产出_利用南山1米大视场望远镜（NOWT）观测数据的文章 |
| Corresponding Author | Wang, Ya-Hui |
| Affiliation | 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 |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Wang-2019-From multi（781KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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