PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. IV. AV HYDRAE AND DZ CASSIOPEIAE
Yang, Y. -G.1,3; Li, L. -H.2; Dai, H. -F.1,3; Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2012-08
卷号144期号:2
DOI10.1088/0004-6256/144/2/50
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (Av Hydrae Dz Cassiopeiae)
摘要We present BVR photometric observations and several eclipsing times for AV Hya and DZ Cas from 2004 to 2011. Using the Wilson-Devinney method, the photometric solutions with hot spots were deduced from their asymmetric light curves. The results indicate that both stars are Algol-type binaries, whose mass ratio, q(ph), and fill-out factor of the primary, f(1), are q(ph) = 0.255(+/- 0.002) and f(1) = 81.2(+/- 0.2)% for AV Hya, and q(ph) = 0.093(+/- 0.003) and f(1) = 98.7(+/- 0.3)% for DZ Cas. Based on all available light minimum times, it is discovered that the O-C curve of each star could be described by a light-time orbit overlying on a downward parabola. Their periods and amplitudes are P-3 = 37.2(+/- 0.7) yr and A = 0.(d)0095(+/- 0.(d)0006) for AV Hya, and P-3 = 62.5(+/- 1.0) yr andA = 0.(d)0183(+/- 0.(d)0007) for DZ Cas. Cyclic variations may result from the light-time effect due to the third body. The secular period decrease rates are dP/dt = -1.47(+/- 0.04) x 10(-7) days yr(-1) for AV Hya and dP/dt = -0.92(+/- 0.04) x 10(-7) days yr(-1) for DZ Cas. This may be interpreted using mass and angular momentum loss from the system. With decreasing period, the fill-out factor of the primary increases and it may finally fill its inner Roche lobe. Therefore, AV Hya and DZ Cas with a secular period decrease will evolve from semi-detached configurations into contact ones.
项目资助者National Natural Science Foundation of China(10778707,10978010,11133007) ; Anhui Provincial Natural Science Foundation(1208085MA04) ; Excellent Young Talents in the Higher Education Institutions of Annui Province(2011 SQRL071) ; Key Laboratory for the Structure and Evolution of Celestial Objects(OP201110)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
WOS记录号WOS:000306596600021
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; LIGHT CURVES ; CATALOG ; SYSTEMS ; STARS ; MASS
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9426
专题中国科学院天体结构与演化重点实验室
通讯作者Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China.
作者单位1.School of Physics and Electronic Information, Huaibei Normal University, 235000 Huaibei, Anhui Province, China
2.National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, China
3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
推荐引用方式
GB/T 7714
Yang, Y. -G.,Li, L. -H.,Dai, H. -F.,et al. PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. IV. AV HYDRAE AND DZ CASSIOPEIAE[J]. ASTRONOMICAL JOURNAL,2012,144(2).
APA Yang, Y. -G.,Li, L. -H.,Dai, H. -F.,&Yang, YG .(2012).PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. IV. AV HYDRAE AND DZ CASSIOPEIAE.ASTRONOMICAL JOURNAL,144(2).
MLA Yang, Y. -G.,et al."PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. IV. AV HYDRAE AND DZ CASSIOPEIAE".ASTRONOMICAL JOURNAL 144.2(2012).
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
PHOTOMETRIC PROPERTI(1017KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yang, Y. -G.]的文章
[Li, L. -H.]的文章
[Dai, H. -F.]的文章
百度学术
百度学术中相似的文章
[Yang, Y. -G.]的文章
[Li, L. -H.]的文章
[Dai, H. -F.]的文章
必应学术
必应学术中相似的文章
[Yang, Y. -G.]的文章
[Li, L. -H.]的文章
[Dai, H. -F.]的文章
相关权益政策
暂无数据
收藏/分享
文件名: PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. IV. AV HYDRAE AND DZ CASSIOPEIAE.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。