Light-Time Effect in the Early-Type Close Binary ZZ Cassiopeiae
文献类型：期刊论文
| 作者 | Liao WP(廖文萍)1 ; Qian SB(钱声帮)2
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2009 |
| 卷号 | 61期号:4页码:777-781 |
| 关键词 | stars: binaries: close stars: binaries: eclipsing stars: individuals (ZZ Cassiopeiae) stars: multiple |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Liao, WP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | CCD observations of the eclipsing binary ZZ Cas were carried out during three nights from 2007 to 2008. Based on our new CCD times of light minimum and all available photoelectric and CCD data compiled from the literature, orbital period changes of ZZ Cas were analyzed. It was discovered that there may exist two cyclic variations (i.e., P(3) = 13.63 yr and A(3) = 0.02406 d, P(4) = 3.89 yr and A(4) = 0.00295 d). ZZ Cas is composed of early type component stars; the two cyclic variations can be explained by the light-time effect via the presence of the third and fourth bodies in the system. Minimal masses Of M(3) = 5.00 M(circle dot) and M(4) = 1.21 M(circle dot) were also calculated, respectively. These conclusions are in agreement with the result of previous investigations, that the additional bodies should contribute 23.6% to the total light of the system (Zasche 2009, New Astron., 14, 129), when the inclinations of the third and the fourth bodies are i(3) = i(4) = 58.degrees 9. The third and fourth bodies orbit the eclipsing binary at orbital distances of a(3) = 11.74 AU and a(4) = 6.14 AU, respectively. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ORBITAL PERIOD CHANGES ; ECLIPSING BINARIES |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/61/4/777 |
| 语种 | 英语 |
| WOS记录号 | WOS:000271364000022 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5832]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, P. R. China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), Beijing 100012, P. R. China Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China |
| 推荐引用方式 GB/T 7714 | Liao WP,Qian SB. Light-Time Effect in the Early-Type Close Binary ZZ Cassiopeiae[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2009,61(4):777-781. |
| APA | Liao WP,&Qian SB.(2009).Light-Time Effect in the Early-Type Close Binary ZZ Cassiopeiae.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,61(4),777-781. |
| MLA | Liao WP,et al."Light-Time Effect in the Early-Type Close Binary ZZ Cassiopeiae".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61.4(2009):777-781. |
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来源：云南天文台
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