Back to the Abstracts Index Page
S. Vennes, D.T. Wickramasinghe, J.R. Thorstensen, D.J. Christian, and M.S. Bessell
We have obtained phase-resolved spectroscopy (3660-6040A) of the recently discovered cataclysmic variable EUVE J2115-586 using the 74-inch telescope at Mount Stromlo Observatory. The radial velocity is modulated over a period of 110.8 min with a possible one-cycle-per-day alias of 102.8 min, and a semiamplitude of ~270 km/s at H-beta and ~390 km/s at HeII lambda 4686. The spectroscopic appearance (HI Balmer, CaII, HeI, HeII emission lines), the orbital period, and the velocity amplitude indicate that this cataclysmic variable is probably an AM Her type; the absence of cyclotron humps indicates a low intensity magnetic field (B < 20 MG). Extreme ultraviolet emission phased at the orbital period shows evidence of variability, but additional EUV/soft x-ray observations are recommended.
Back to the Abstracts Index Page
