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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.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2010-12-11
卷号409期号:3页码:1195-1202
DOI10.1111/j.1365-2966.2010.17384.x
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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
ISSN0035-8711
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
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被引频次:14[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/114a53/5833
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
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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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