1RXSJ062518.2+733433: A new intermediate polar

Details 1RXSJ062518.2+733433: A new intermediate polar 1RXSJ062518.2+733433: A new intermediate polar

2003-05-15

arxiv.org/abs/astro-ph/0305270v1

Astron.Astrophys. 406 (2003) 213-220

Astronomy and Astrophysics

Astrophysics

7 pages, A&A-Latex, 9 Figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20030787

We report the identification of the cataclysmic variable 1RXSJ062518.2+733433 as an intermediate polar. The orbital period of the system is determined to be 283.0+-2 min from the radial velocity variation of Halpha, measured in an extensive set of time-resolved spectroscopy. 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 1RXSJ062518.2+733433 display a complex multicomponent structure. In the trailed spectrogram of HeI 6678 we detect a narrow component with a radial velocity semi-amplitude of ~140kms, 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<=60deg.

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