A Far Ultraviolet Study of the Hot White Dwarf in the Dwarf Nova WW Ceti.
We present a synthetic spectral analysis of IUE archival and FUSE (Far Ultraviolet Spectroscopic Explorer) far- UV spectra of the peculiar dwarf nova WW Cet. During the quiescence of WW Cet, a white dwarf with Twd 26;000 1000 K can account for the far-UV flux and yields the proper distance. However, the best agreement with the observations is provided by a two-temperature white dwarf model with a cooler white dwarf at Twd 1/4 25;000 K providing 75% of the far-UV flux and a hotter region (accretion belt or optically thick disk ring) with T 1/4 40;000 K contributing 25% of the flux for the proper distance. We find from the FUSE spectrum that the white dwarf is rotating with V sin i 1/4 600 100 km s_1. Our temperature results provide an additional data point in the distribution of WD Twd versus orbital period above the CV period gap, where few WD Twd values are available.
|Main Author:||Godon, Patrick.|
|Other Authors:||Seward, Laura., Sion, Edward., Szkody, Paula.|