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MN Dra - In-the-Gap Dwarf Nova With Negative Superhumps

By Elena Pavlenko, Taichi Kato, Max Andreev, Alexandr Sklyanov, Alexandra Zubareva, Denis Samsonov, Irina Voloshina, Vladimir Metlov, Sergey Shugarov, Nikolay Parakhin, Alex Golovin and Oksana Antoniuk


The multi-site photometric observations of MN Dra were made over 77 nights in August-November, 2009. The total exposure was 433 hours. During this time the binary underwent two superoutbursts and five normal outbursts. During the course of first superoutburst period of positive superhumps decreased with extremely large $\dot P = -1.5 \times 1.0^{-4}$ for SU UMa-like dwarf novae, confirming known behavior of MN Dra [1]. Between the superoutbursts MN Dra displayed negative superhumps. Their period changed cyclically around 0.096-day value.Comment: 17TH European White Dwarf Workshop. AIP Conference Proceedings, Volume 1273, pp. 320-323 (2010

Topics: Astrophysics - Solar and Stellar Astrophysics
Year: 2011
DOI identifier: 10.1063/1.3527832
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