| Orbital period analyses for two cataclysmic variables: UZ Fornacis and V348 Puppis inside the period gap | |
Dai ZB(戴智斌)1,2 ; Qian SB(钱声帮)1,2; Lajus, EF3; Baume, GL3; Dai, ZB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2010-12-11 | |
| 卷号 | 409期号:3页码:1195-1202 |
| DOI | 10.1111/j.1365-2966.2010.17384.x |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: Eclipsing Stars: Individual: Uz For Stars: Individual: V348 Pup Novae Cataclysmic Variables |
| 摘要 | Four new CCD eclipse timings of the white dwarf for polar UZ Fornacis and six updated CCD mid-eclipse times for SW-Sex-type nova-like V348 Puppis are obtained. Detailed O-C analyses are made for both cataclysmic variables (CVs) inside the period gap. Orbital period increases at a rate of 2.63(+/- 0.58) x 10-11 s s -1 for UZ For and 5.8(+/- 1.9) x 10-12 s s -1 for V348 Pup, respectively, are discovered in their new O-C diagrams. However, conservative mass transfer from the secondary to the massive white dwarf cannot explain the observed orbital period increases for both CVs, which are regarded as part of modulations at longer periods. Moreover, the O-C diagram of UZ For shows a possible cyclical change with a period of similar to 23.4(+/- 5.1) yr. To explain the observed cyclical period changes in UZ For, both mechanisms of magnetic activity cycles in late-type secondaries and the light travel-time effect are regarded as probable causes. Not only does the modulation period of 23.4 yr obey the empirical correlation between P-mod and , but also the estimated fractional period change delta P/P similar to 7.3 x 10-7 displays a behaviour similar to that of CVs below the period gap. On the other hand, a calculation for the light travel-time effect implies with a high confidence level that the tertiary component in UZ For may be a brown dwarf, when the orbital inclination of the third body is larger than 16 degrees. |
| 项目资助者 | Special Foundation of The Chinese Academy of Sciences ; West Light Foundation of The Chinese Academy of Sciences ; Yunnan Natural Science Foundation [2008CD157, 2005A0059M] ; Chinese Natural Science Foundation [10573032, 10573013, 10433030] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| 归档日期 | 2010-12-08 |
| WOS记录号 | WOS:000284854300027 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | BINARY-SYSTEMS ; LIGHT CURVES ; RS CVN ; EXO-033319-2554.2 ; V348-PUPPIS ; MODULATION ; EVOLUTION ; STATE |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5833 |
| 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, PO Box 110, 650011 Kunming, China 2.United Laboratory of Optical Astronomy, Chinese Academy of Science (ULOAC), 100012 Beijing, China 3.Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata and Instituto de Astrofísica de La Plata (CCT La Plata – CONICET/UNLP), Paseo del Bosque s/n, La Plata, 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. Orbital period analyses for two cataclysmic variables: UZ Fornacis and V348 Puppis inside the period gap[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,409(3):1195-1202. |
| APA | Dai ZB,Qian SB,Lajus, EF,Baume, GL,&Dai, ZB .(2010).Orbital period analyses for two cataclysmic variables: UZ Fornacis and V348 Puppis inside the period gap.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,409(3),1195-1202. |
| MLA | Dai ZB,et al."Orbital period analyses for two cataclysmic variables: UZ Fornacis and V348 Puppis inside the period gap".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 409.3(2010):1195-1202. |
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| Orbital period analy（804KB） | 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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