A photometry campaign for IR geminorum in quiescence

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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
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2004-02
卷号	4 期号:1 页码:88-96
关键词	accretion, accretion disks binaries : close novae, cataclysmic variables stars : dwarf nova stars : individual (IR Geminorum)
ISSN号	1009-9271
通讯作者	Fu, H (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
产权排序	第三完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
分类号	P152
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	FAINT CATACLYSMIC VARIABLES ; TIME-RESOLVED PHOTOMETRY ; URSAE MAJORIS ; DWARF-NOVA ; SUPERHUMPS ; BINARIES ; GEM ; SECONDARY
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/4/1/88/
语种	英语
WOS记录号	WOS:000189162800010
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4182]
专题	云南天文台_其他
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,&Gaskell, CM.(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.