Orbital periods of cataclysmic variables identified by the SDSS -: III.: Time-series photometry obtained during the 2004/5 International Time Project on La Palma

被引:37
作者
Dillon, M. [1 ]
Gaensicke, B. T. [1 ]
Aungwerojwit, A. [1 ,2 ]
Rodriguez-Gil, P. [3 ]
Marsh, T. R. [1 ]
Barros, S. C. C. [1 ]
Szkody, P. [4 ]
Brady, S.
Krajci, T. [5 ]
Oksanen, A. [6 ]
机构
[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[2] Naresuan Univ, Dept Phys, Fac Sci, Phitsanulok 65000, Thailand
[3] Inst Astrofis Canarias, Tenerife 38200, Spain
[4] Univ Washington, Dept Astron, Seattle, WA 98195 USA
[5] Astrokolkhoz Observ, Cloudcroft, NM 88317 USA
[6] Hankasalmi Observ, FI-40100 Jyvaskyla, Finland
基金
英国科学技术设施理事会;
关键词
binaries; close; eclipsing; spectroscopic; stars; dwarf novae; novae; cataclysmic variables; white dwarfs;
D O I
10.1111/j.1365-2966.2008.13170.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present time-resolved CCD photometry of 15 cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS). The data were obtained as part of the 2004/2005 International Time Programme on La Palma. We discuss the morphology of the light curves and the CV subtypes, and give accurate orbital periods for 11 systems. Nine systems are found below the 2-3 h orbital period gap, of which five have periods within a few minutes of the similar to 80 min minimum orbital period. One system each is found within and above the gap. This confirms the previously noted trend for a large fraction of short-period systems among the SDSS CVs. Objects of particular interest are SDSS J0901+4809 and SDSS J1250+6655 which are deeply eclipsing. SDSS J0854+3905 is a polar with an extremely modulated light curve, which is likely due to a mixture of cyclotron beaming and eclipses of the accretion region by the white dwarf. One out of five systems with white dwarf dominated optical spectra exhibits non-radial pulsations.
引用
收藏
页码:1568 / 1578
页数:11
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