A Caltech Library Service

Galex and optical light curves of EF Eridanus during a low state: The puzzling source of ultraviolet light

Szkody, Paula and Harrison, Thomas E. and Plotkin, Richard M. and Howell, Steve B. and Seibert, Mark and Bianchi, Luciana (2006) Galex and optical light curves of EF Eridanus during a low state: The puzzling source of ultraviolet light. Astrophysical Journal, 646 (2). L147-L150. ISSN 0004-637X.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Plotkin, Richard M.0000-0002-7092-0326
Howell, Steve B.0000-0002-2532-2853
Seibert, Mark0000-0002-1143-5515
Bianchi, Luciana0000-0001-7746-5461
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.
Funding AgencyGrant Number
Subject Keywords:binaries: close—binaries: spectroscopic—novae, cataclysmic variables—ultraviolet: stars
Issue or Number:2
Record Number:CaltechAUTHORS:SZKapjl06
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5620
Deposited By: Lindsay Cleary
Deposited On:26 Oct 2006
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page