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 K can account for the far-UV flux and yields the proper distance. However, the best agreem...

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Journal Title: Astronomical Journal Vol. 131; no. 5; pp. 2634 - 2642
Authors: Patrick Godon, Edward Sion, Paula Szkody, Laura Seward
Format: Article
Language: English
Published: May 2006
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Online Access: Full Text
Summary: 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 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 K providing 75% of the far-UV flux and a hotter region (accretion belt or optically thick disk ring) with K contributing 25% of the flux for the proper distance. We find from the FUSE spectrum that the white dwarf is rotating with 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.
ISSN: 0004-6256
DOI: 10.1086/501523