The 71-Second Oscillation of DQ Her at 2180 Å
The 71-s modulation in the light curve of the old nova DQ Her has a mean semi-amplitude of 1.8% at 2180Å, although the amplitude varies by at least a factor of two from orbit to orbit. The disturbance in the amplitude and phase of the modulation during eclipses is similar to that observed at visual wavelengths. We conclude that at 2180Å, as at visual wavelengths, the modulated flux is reprocessed and comes from the accretion disk.
KeywordsLight Curve Accretion Disk White Dwarf Visual Wavelength Orbital Phase
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