Published August 1, 2006
| Published
Journal Article
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Galex and optical light curves of EF Eridanus during a low state: The puzzling source of ultraviolet light
Abstract
Low-state optical photometry of EF Eri during an extended low accretion state combined with GALEX near- and far-UV time-resolved photometry reveals a source of UV flux that is much larger than the underlying 9500 K white dwarf and that is highly modulated on the orbital period. The near-UV and optical light curves can be modeled with a 20,000 K spot, but no spot model can explain both the large-amplitude FUV variations and the SED. The limitations of limb darkening, cyclotron, and magnetic white dwarf models in explaining the observations are discussed.
Additional Information
© 2006 The American Astronomical Society. Received 2006 April 21; accepted 2006 June 21; published 2006 July 21. Support for this research was provided by NASA GALEX grant NNG05GG46G.Attached Files
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Additional details
- Eprint ID
- 5620
- Resolver ID
- CaltechAUTHORS:SZKapjl06
- NNG05GG46G
- NASA
- Created
-
2006-10-26Created from EPrint's datestamp field
- Updated
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2020-03-09Created from EPrint's last_modified field