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.
Language: English
Published: 2006
Online Access: http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:176402