Photometric investigation and orbital period analyses of the W UMa binaries FP Lyn, FV CVn and V354 UMa
文献类型：期刊论文
| 作者 | Michel Raul1; Xia QiQi2; Higuera Jesus1 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2019 |
| 卷号 | 19期号:7 |
| 关键词 | THERMAL RELAXATION OSCILLATION LIGHT CURVES ECLIPSING BINARY VARIABLE-STARS CONTACT EVOLUTION SYSTEMS stars: binaries: close stars: binaries: eclipsing stars: individual (FP Lyn, FV CVn and V354 UMa) |
| ISSN号 | 1674-4527 |
| 英文摘要 | New light curves and photometric solutions of FP Lyn, FV CVn and V354 UMa are presented. We found that these three systems are W-subtype shallow contact binaries. In addition, it is obvious that the light curves of FP Lyn and V354 UMa are asymmetric. Therefore, a hot spot was added on the primary star of FP Lyn and a dark spot was added on the secondary star of V354 UMa. At the same time, we added a third light to the photometric solution of FP Lyn for the final result. The obtained mass ratios and fill-out factors are q = 1.153 and f = 13.4% for FP Lyn, q = 1.075 and f = 4.6% for FV CVn, and q = 3.623 and f = 10.7% for V354 UMa respectively. The investigations of orbital period for these three systems indicate that the periods are variable. FP Lyn and V354 UMa were discovered to have secularly increasing components with rates of dp/dt = 4.19 x 10(-7) d yr(-1) and dp/dt = 7.70 x 10(-7) d yr(-1) respectively, which are feasibly caused by conservative mass transfer from the less massive component to the more massive component. In addition, some variable components were discovered for FV CVn, including a rate of dp/dt = -1.13 x 10(-6) d yr(-1) accompanied by a cyclic oscillation with amplitude and period of 0.0069 d and 10.65 yr respectively. The most likely explanation for the long-term decrease is angular momentum loss. The existence of an additional star is the most plausible explanation for the periodic variation. |
| 资助项目 | [Universidad Nacional Autonoma de Mexico (UNAM)] ; [DGAPA] ; [National Natural Science Foundation of China (NSFC)] ; [NSFC] ; [Chinese Academy of Sciences (CAS)] ; [Natural Science Foundation of Shandong Province] ; [Young Scholars Program of Shandong University, Weihai] ; [Open Research Programof Key Laboratory for the Structure and Evolution of Celestial Objects] ; [National Development and Reform Commission] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63032]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Univ Nacl Autonoma Mexico, Institute Astron, Observ Astron Nacl, Apartado Postal 877, Ensenada 22830, Baja California, Mexico 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Michel Raul,Xia QiQi,Higuera Jesus. Photometric investigation and orbital period analyses of the W UMa binaries FP Lyn, FV CVn and V354 UMa[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(7). |
| APA | Michel Raul,Xia QiQi,&Higuera Jesus.(2019).Photometric investigation and orbital period analyses of the W UMa binaries FP Lyn, FV CVn and V354 UMa.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(7). |
| MLA | Michel Raul,et al."Photometric investigation and orbital period analyses of the W UMa binaries FP Lyn, FV CVn and V354 UMa".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.7(2019). |
入库方式： OAI收割
来源：国家天文台
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