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| Paper: |
Dwarf nova oscillations: New results |
| Volume: |
261, The Physics of Cataclysmic Variables and Related Objects |
| Page: |
406 |
| Authors: |
Warner, B.; Woudt, P. A. |
| Abstract: |
New and archived observations of VW Hyi in outburst show the occasional presence of optical Dwarf Nova Oscillations (DNOs) over the range of 18--40 s. There is a rapid increase in period near the end of outburst, at the same time that the EUV falls almost to zero, which we attribute to propellering. The DNOs return to a shorter period after this phase, but are very incoherent. The DNOs show some modulation by the Quasi-Periodic Oscillations (QPOs) that are also occasionally present in the light curve. We interpret the QPOs as a prograde travelling wave in the inner disc, which obscures and/or reprocesses radiation from the central region. The model is applied to observations of OY Car and WZ Sge. |
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