1RXS J062518.2+733433:: A new intermediate polar

被引:28
作者
Araujo-Betancor, S [1 ]
Gänsicke, BT
Hagen, HJ
Rodriguez-Gil, P
Engels, D
机构
[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England
[2] Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany
关键词
stars : binaries : close; stars : individual : 1RXS J062518.2+733433; stars; novae; cataclysmic variables;
D O I
10.1051/0004-6361:20030787
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report the identification of the cataclysmic variable 1RXS J062518.2+733433 as an intermediate polar. The orbital period of the system is determined to be 283.0 +/- 0.2 min from the radial velocity variation of Ha, measured in an extensive set of time-resolved spectra. Differential optical photometry obtained over a base line of three weeks reveals the presence of coherent variability with a period of 19.788 +/- 0.002 min, which we suggest to be the white dwarf spin period. The power spectrum of our photometry also contains a strong signal near the spectroscopically-determined orbital period. The emission lines in 1RXS J062518.2+733433 display a complex multicomponent structure. In the trailed spectrogram of He I lambda 6678 we detect a narrow component with a radial velocity semi-amplitude of similar or equal to140 kms, consistent with a possible origin on the irradiated face of the secondary. The absence of eclipses gives an upper limit on the binary inclination of i less than or similar to 60degrees.
引用
收藏
页码:213 / 219
页数:7
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