2006ApJ...646L.147S

Query : 2006ApJ...646L.147S

2006ApJ...646L.147S - Astrophys. J., 646, L147-L150 (2006/August-1)

GALEX and optical light curves of EF eridanus during a low state: the puzzling source of ultraviolet light.

SZKODY P., HARRISON T.E., PLOTKIN R.M., HOWELL S.B., SEIBERT M. and BIANCHI L.

Abstract (from CDS):

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.

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Journal keyword(s): Stars: Binaries: Close - Stars: Binaries: Spectroscopic - Stars: Novae, Cataclysmic Variables - Ultraviolet: Stars

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* EF Eri CV* 03 14 13.2526234800 -22 35 42.900077688   15.4 14.53 13.5   DA 453 0
2 V* AR UMa CV* 11 15 44.5891034908 +42 58 22.431026739     16.4     O9I 154 0
3 V* AP CrB CV* 15 54 12.3454476576 +27 21 52.290975024     16.87 16.5   M3 47 0

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