A photometry campaign for IR geminorum in quiescence

doi:10.1088/1009-9271/4/1/88

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	A photometry campaign for IR geminorum in quiescence
	Fu, H 1; Li, ZY 1; Leung, KC 2; Zhang ZS(张周生)3 ; Li ZL(李自力)3 ; Gaskell, CM 2; Fu, H (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
发表期刊	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2004-02
卷号	4 期号:1 页码:88-96
DOI	10.1088/1009-9271/4/1/88
分类号	P152
产权排序	第3完成单位
收录类别	SCI
关键词	Binaries : Close Accretion Accretion Disks Stars : Dwarf Nova Novae Stars : Individual (Ir Geminorum) Cataclysmic Variables
摘要	We report a V band photometry of the SU UMa star IR Gem at quiescence in January 2002. The observations were made with two telescopes spaced similar to 160degrees apart in longitude. Several photometric modulations have been found. One gives a period of 98.50(13) min, exactly equal to the orbital period determined spectroscopically. Two others occasionally strengthen and seem to be positive and negative superhumps with periods of 103.6(4) and 95.4(4) min, 5.2% longer and 3.1% shorter than the orbital period, respectively. A signal at similar to 0.6 c/d in the power spectrum is roughly consistent with the expected period of nodal precession of the disk. There is a puzzling peak at 0.21(3) c/d corresponding to the similar to 4.3 d sine wave seen in the raw light curve. We suspect it to be a beat frequency between the frequencies of apsidal and nodal precessions of the disk. Quasi-periodic cycles with amplitudes 0.15-0.6 mag can be seen in the light curve. The mechanism underlying this modulation is not clear.
项目资助者	Supported by the National Natural Science Foundation of China.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1009-9271
URL	查看原文
WOS记录号	WOS:000189162800010
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	FAINT CATACLYSMIC VARIABLES ; TIME-RESOLVED PHOTOMETRY ; URSAE MAJORIS ; DWARF-NOVA ; SUPERHUMPS ; BINARIES ; GEM ; SECONDARY
引用统计	被引频次：8[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/114a53/4182
专题	其他
通讯作者	Fu, H (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
作者单位	1.Department of Astronomy, Nanjing University, Nanjing 210093 2.Department of Physics and Astronomy, University of Nebraska, Lincoln NE 68588-0111, USA 3.National Astronomical Observatories, Yunnan Observatory, Kunming 650011
推荐引用方式 GB/T 7714	Fu, H,Li, ZY,Leung, KC,et al. A photometry campaign for IR geminorum in quiescence[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2004,4(1):88-96.
APA	Fu, H.,Li, ZY.,Leung, KC.,Zhang ZS.,Li ZL.,...&Fu, H .(2004).A photometry campaign for IR geminorum in quiescence.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,4(1),88-96.
MLA	Fu, H,et al."A photometry campaign for IR geminorum in quiescence".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 4.1(2004):88-96.

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