Spectroscopy of Four Cataclysmic Variables with Periods above 7 Hours

Details Spectroscopy of Four Cataclysmic Variables with Periods above 7 Hours Spectroscopy of Four Cataclysmic Variables with Periods above 7 Hours

2005-11-15

arxiv.org/abs/astro-ph/0511461v1

Astronomy and Astrophysics

Astrophysics

22 pages, 3 figures, 5 tables, to be published in December 2006 PASP

Scientific paper

10.1086/497384

We present spectroscopy of four cataclysmic variables. Using radial velocity measurements, we find orbital periods for the first time. The stars and their periods are GY Hya, 0.347230(9) d; SDSS J204448-045929, 1.68(1) d; V392 Hya, 0.324952(5) d; and RX J1951.7+3716, 0.492(1) d. We also detect the spectra of the secondary stars, estimate their spectral types, and derive distances based on surface brightness and Roche lobe constraints.

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