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Paper: FUSE Observations of the Dwarf Nova EM Cygni
Volume: 330, The Astrophysics of Cataclysmic Variables and Related Objects
Page: 351
Authors: Welsh, W.F.; Froning, C.S.; Marsh, T.R.; Robinson, E.L.; Wood, J.H.
Abstract: FUSE observations of the eclipsing, double-lined dwarf nova EM Cygni reveal a complex spectrum, exhibiting the usual C III and O VI lines plus a host of unidentified absorption and emission features. Our initial attempts at fitting the continuum with a white dwarf plus accretion disk model only crudely match the observations and thus only provide a rough estimate of the mass-accretion rate and the white dwarf temperature. Using the observed FUV lines we measure the orbital velocity of the white dwarf finding K1 ~131 km/s, allowing us to revise the system parameters. Most notably, we find a mass ratio q=0.65, much lower than previous estimates.
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