A Far-Ultraviolet Study of the Hot White Dwarf in the Dwarf Nova WW Ceti | Zendy

Patrick Godon | Zendy; Laura M. Seward | Zendy; E. M. Sion | Zendy; Paula Szkody | Zendy

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A Far-Ultraviolet Study of the Hot White Dwarf in the Dwarf Nova WW Ceti

Author(s) -

Patrick Godon,

Laura M. Seward,

E. M. Sion,

Paula Szkody

Publication year - 2006

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/501523

Subject(s) - white dwarf , physics , astrophysics , dwarf nova , flux (metallurgy) , intermediate polar , astronomy , orbital period , stars , materials science , metallurgy

We present a synthetic spectral analysis of IUE archival and FUSE FUV spectraof the peculiar dwarf nova WW Ceti. During the quiescence of WW Ceti, a whitedwarf with Twd=26,000K can account for the FUV flux and yields the properdistance. However, the best agreement with the observations is provided by atwo-temperature white dwarf model with a cooler white dwarf at Twd=25,000Kproviding 75% of the FUV flux and a hotter region (accretion belt or opticallythick disk ring) with T=40,000K contributing 25% of the flux for the properdistance. We find from the FUSE spectrum that the white dwarf is rotating witha projected rotational velocity V sin{i} = 600 km/s. Our temperature resultsprovide an additional data point in the distribution of Twd versus orbitalperiod above the CV period gap where few Twds are available.Comment: 25 pages, 3 tables, 8 figures (including 2 color ones), final versio

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