The cataclysmic variable CW 1045+525: a secondary-dominated dwarf nova?

Details The cataclysmic variable CW 1045+525: a secondary-dominated dwarf nova? The cataclysmic variable CW 1045+525: a secondary-dominated dwarf nova?

2001-10-17

arxiv.org/abs/astro-ph/0110406v2

Astronomy and Astrophysics

Astrophysics

11 pages, including 10 figures, accepted for publication in A&A; only cosmetic changes: some text accidentally was in boldface

Scientific paper

10.1051/0004-6361:20011441

We present spectroscopic and photometric observations of the cataclysmic variable CW 1045+525. Both the optical spectrum and the photometric lightcurve show a strong contribution of a K5V - M0V secondary. We derive an orbital period P_orb = 0.271278(1) d by measuring the radial velocities of the absorption lines of the secondary. The period and spectral type of the secondary suggest a distance of 350 - 700 pc. There is evidence for additional sources of line- and continuum emission, but no direct evidence of an accretion disc. We discuss several scenarios for the nature of CW 1045+525 on the basis of our results, finding a dwarf nova classification the most probable, although not completely satisfying, explanation for the observed characteristics.

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