Unusual Phase Reversal of Superhumps in ER Ursae Majoris
arXiv:astro-ph/0211520 · doi:10.1093/pasj/55.2.L7
Abstract
We studied the evolution of superhumps in the peculiar SU UMa-type dwarf nova, ER UMa. Contrary to the canonical picture of the SU UMa-type superhump phenomena, the superhumps of ER UMa show an unexpected phase reversal during the very early stage (~5 d after the superoutburst maximum). We interpret that a sudden switch to so-called late superhumps occurs during the very early stage of a superoutburst. What had been believed to be (ordinary) superhumps during the superoutburst plateau of ER UMa were actually late superhumps. The implication of this discovery is briefly discussed.
4 pages, 5 figures, submitted to Publ. Astron. Soc. Japan
Cited by in corpus (11)
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
- Variable Star Network: World Center for Transient Object Astronomy and Variable Stars
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)
- Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri
- Superhumps in the Rarely Outbursting SU UMa-Type Dwarf Nova, HO Delphini
- Discovery of Negative Superhumps during a Superoutburst of January 2011 in ER Ursae Majoris
- SDSS J210014.12+004446.0 - dwarf nova with negative and positive superhumps
- IX Draconis - a curious ER UMa-type dwarf nova
- Photometric Studies of a WZ Sge-Type Dwarf Nova Candidate, ASAS160048-4846.2
- Curious Variables Experiment (CURVE). CCD photometry of active dwarf nova DI UMa