Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)
| Autor: | William Stein, Kazuyoshi Imamura, Pavol A. Dubovsky, Kiyoshi Kasai, Tamás Tordai, Nikolai Parakhin, Youichirou Nakashima, Steve Brady, Sergey Yu. Shugarov, Katsura Matsumoto, Seiji Ueda, Ivan M. Sergey, Eriko Iino, Donn R. Starkey, Nanae Kunitomi, Richard Sabo, Thomas Krajci, Enrique de Miguel, Rod Stubbings, Koh-ichi Itagaki, Oksana I. Antonyuk, Tomohito Ohshima, Jani Virtanen, Kirill A. Antonyuk, Robert Koff, Igor Kudzej, Denis Samsonov, Hiroshi Itoh, Colin Littlefield, Jochen Pietz, Tim Crawford, Aleksei V. Baklanov, D. Denisenko, Arto Oksanen, Shinichi Nakagawa, Natalia Katysheva, S. A. Korotkiy, Yenal Ogmen, Etienne Morelle, Bart Staels, Seiichiro Kiyota, Arne Henden, William N. Goff, Gary Poyner, Atsushi Miyashita, Hiroki Nishitani, Seiichi Yoshida, Shawn Dvorak, Hidehiko Akazawa, Hiroyuki Maehara, Chihiro Akasaka, V. P. Goranskij, Kazuhiko Shiokawa, Drahomir Chochol, Ryosuke Takagi, Kenji Tanabe, Aleksei A. Sosnovskij, Taichi Kato, Nick James, Ryo Noguchi, Maksim V. Andreev, Gianluca Masi, Ian Miller, Tomoya Aoki, Roger D. Pickard, Hideo Nishimura, Javier Ruiz, Elena P. Pavlenko, Yutaka Maeda, Franz-Josef Hambsch, Hiroshi Kobayashi, David Boyd, Kirill Sokolovsky, Robert Fidrich, Greg Bolt, Mikiha Nose, Jeremy Shears, Berto Monard |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Accretion (meteorology) Late stage FOS: Physical sciences Astronomy and Astrophysics Astrophysics Luminosity Secondary component Beat phenomenon Phase reversal Amplitude Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Maxima Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | ResearcherID Scopus-Elsevier |
| ISSN: | 2010-2011 |
| DOI: | 10.48550/arxiv.1108.5252 |
| Popis: | Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during the 2010-2011 season. Although most of the new data for systems with short superhump periods basically confirmed the findings by Kato et al. (2009) and Kato et al. (2010, PASJ 62, 1525, arXiv:1009.5444), the long-period system GX Cas showed an exceptionally large positive period derivative. An analysis of public Kepler data of V344 Lyr and V1504 Cyg yielded less striking stage transitions. In V344 Lyr, there was prominent secondary component growing during the late stage of superoutbursts, and the component persisted at least for two more cycles of successive normal outbursts. We also investigated the superoutbursts of two conspicuous eclipsing objects: HT Cas and the WZ Sge-type object SDSS J080434.20+510349.2. Strong beat phenomena were detected in both objects, and late-stage superhumps in the latter object had an almost constant luminosity during the repeated rebrightenings. The WZ Sge-type object SDSS J133941.11+484727.5 showed a phase reversal around the rapid fading from the superoutburst. The object showed a prominent beat phenomenon even after the end of the superoutburst. A pilot study of superhump amplitudes indicated that the amplitudes of superhumps are strongly correlated with orbital periods, and the dependence on the inclination is weak in systems with inclinations smaller than 80 deg. Comment: 87 pages, 92 figures, Accepted for publication in PASJ, correction in the author list and text |
| Databáze: | OpenAIRE |
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