EVIDENCE OF A BROWN DWARF IN THE ECLIPSING DWARF NOVA Z CHAMAELEONIS | |
Dai ZB(戴智斌)1,2,3; Qian SB(钱声帮)1,2; Lajus, EF4; Dai, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. | |
发表期刊 | ASTROPHYSICAL JOURNAL |
2009-09 | |
卷号 | 703期号:1页码:109-113 |
DOI | 10.1088/0004-637X/703/1/109 |
产权排序 | 第1完成单位 |
收录类别 | SCI |
关键词 | Binaries: Eclipsing Stars: Individual (z Chamaeleonis) Novae Cataclysmic Variables |
摘要 | We presented three new CCD observations of light minima of Z Chamaeleonis. All 187 available times of light minimum including 37 photographic data are compiled, and a new orbital period analysis is made by means of the standard O - C technique. The O - C diagram of Z Chamaeleonis presents a cyclical periodic change of similar to 32.57 yr with a high significance level. We attempted to apply two plausible mechanisms (i.e, Applegate's mechanism and light travel-time effect) to explain the cyclical variations of orbital period shown in the O - C diagram. Although the previous works suggested that solar-type magnetic cycles in the red dwarf are the best explanation, the analysis of Applegate's mechanism in this paper presents a negative result. Accordingly, a light travel-time effect is proposed, and a brown dwarf as a tertiary component orbiting around dwarf nova Z Chamaeleonis is derived with a significance level of greater than or similar to 81.6%, which may be a plausible explanation of the periodic variation in the systemic velocity of Z Chamaeleonis in superoutburst. |
项目资助者 | Chinese Academy of Sciences [10573032, 10573013, 10433030] ; Yunnan Natural Science Foundation [2008CD157, 2005A0059M] |
语种 | 英语 |
学科领域 | Astronomy & Astrophysics |
文章类型 | Article |
ISSN | 0004-637X |
URL | 查看原文 |
归档日期 | 2009-09-22 |
WOS记录号 | WOS:000269625000013 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | HIGH-SPEED PHOTOMETRY ; PERIOD CHANGES ; Z-CHA ; CATACLYSMIC VARIABLES ; MAGNETIC BRAKING ; BINARY STARS ; QUIESCENCE ; OUTBURSTS ; VELOCITY ; CYCLES |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5820 |
专题 | 双星与变星研究组 |
通讯作者 | Dai, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 2.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC), 100012 Beijing, People's Republic of China 3.Graduate School of the CAS, Beijing, People's Republic of China 4.Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata Paseo del Bosque s/n, 1900, La Plata, Pcia. Bs. As., Argentina |
第一作者单位 | 中国科学院云南天文台 |
推荐引用方式 GB/T 7714 | Dai ZB,Qian SB,Lajus, EF,et al. EVIDENCE OF A BROWN DWARF IN THE ECLIPSING DWARF NOVA Z CHAMAELEONIS[J]. ASTROPHYSICAL JOURNAL,2009,703(1):109-113. |
APA | Dai ZB,Qian SB,Lajus, EF,&Dai, ZB .(2009).EVIDENCE OF A BROWN DWARF IN THE ECLIPSING DWARF NOVA Z CHAMAELEONIS.ASTROPHYSICAL JOURNAL,703(1),109-113. |
MLA | Dai ZB,et al."EVIDENCE OF A BROWN DWARF IN THE ECLIPSING DWARF NOVA Z CHAMAELEONIS".ASTROPHYSICAL JOURNAL 703.1(2009):109-113. |
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EVIDENCE OF A BROWN (315KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
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