Spectrophotometry of the eclipsing dwarf nova V2051 Ophiuchi.
Watts, D. J.; Bailey, J.; Hill, P. W.; Greenhill, J. G.; McCowage, C.; Carty, T.
Australia, United Kingdom
Abstract
A detailed phase-dependent spectroscopic study of the eclipsing dwarf nova V2051 Oph is reported. The spectroscopic observations were carried out in the optical and UV wavelengths using the 3.9-meter Anglo-Australian Telescope (AAT) International Ultraviolet Explorer (IUE) spacecraft. The optical spectrum shows strong Balmer emission, as well as weak He II emission at 4686 A, and intermediate-strength He I emission at 4471 A. The UV spectrum is similar to that of a dwarf nova in a quiescent state with strong C IV emission. Evidence of asymmetry in the accretion disk is presented, and a solution for the system dynamics is obtained. The observational data are compared to a Keplerian model of disk consisting of 180 azimuthal and 50 equally spaced radial elements. Using the A table summarizing the system parameters of V2051 Oph is provided.