DNOs and QPOs in Cataclysmic Variables
| dc.creator | Warner, Brian | |
| dc.creator | Woudt, Patrick A. | |
| dc.date | 2004-09-13 | |
| dc.date.accessioned | 2026-07-07T02:14:34Z | |
| dc.date.available | 2026-07-07T02:14:34Z | |
| dc.description | We describe some of the recent observations of Dwarf Nova Oscillations and Quasi-Periodic Oscillations in cataclysmic variable stars. The similarities to high frequency QPOs seen in X-Ray binaries make this an increasingly useful field to explore. Our principal new result is the discovery of 1:2:3 harmonic structure in the DNOs of VW Hyi late in outburst. Similar structure is seen in the QPOs of some black hole and neutron star X-Ray binaries. In VW Hyi there is a sudden frequency-doubling when the DNO period reaches ~39 s. This first harmonic increases in period to ~28 s at which point the second harmonic appears. Both harmonics continue with increasing period, together or separately, with an occasional appearance of the fundamental, until the latter reaches ~105 s, by which time VW Hyi has fallen to its quiescent magnitude. We also report the first extensive observations of DNOs in a dwarf nova (OY Car) in quiescence. These are lpDNOs (longer period DNOs) and show similar short time scale properties to the DNOs and lpDNOs seen in outburst. | |
| dc.description | 10 pages, 7 figures. To appear in `The Astrophysics of Cataclysmic Variables and Related Objects', eds. J.M. Hameury and J.P. Lasota (ASP Conf.Ser.) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0409287 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0409287 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/8166 | |
| dc.subject | Astrophysics | |
| dc.title | DNOs and QPOs in Cataclysmic Variables | |
| dc.type | text |