Volume 380, Number 2, December III 2001
|Page(s)||533 - 543|
|Section||Interstellar and circumstellar matter|
|Published online||15 December 2001|
The cataclysmic variable CW 1045+525: A secondary-dominated dwarf nova?
Departamento de Física y Matemáticas, Grupo de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile
2 Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, 35122 Padova, Italy
3 Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire, 03755 USA
4 Astronomisches Institut, Ruhr-Universität, 44780 Bochum, Germany
5 European Southern Observatory, Casilla 19001, Santiago 19, Chile
6 Osservatorio Astronómico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Corresponding author: C. Tappert, firstname.lastname@example.org
Accepted: 10 October 2001
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 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 to be the most probable, although not completely satisfying, explanation for the observed characteristics.
Key words: stars: individual: CW 1045+525 / stars: novae, cataclysmic variables / stars: fundamental parameters / binaries: general
© ESO, 2001
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