| Autor: |
Katsura Matsumoto, Mika Aho, Ken'ichi Torii, A. A. Cárdenas, Rod Stubbings, Matt Aggleton, Koichi Maruoka, Sergey Yu. Shugarov, Jochen Pietz, Hajime Baba, Jim Kern, Arto Oksanen, A. A. Henden, Keith Geary, Mayumi Kida, Taichi Kato, Marko Moilanen, Tomas Hynek, Atsushi Miyashita, Alexander V. Yushchenko, Stan Walker, Mahito Sasada, Tom Richards, Petr Šťastný, R. Kocián, Franco Mallia, Lewis M. Cook, B. Heathcote, Ian Miller, Radka Dancikova, Kazuyoshi Imamura, Carlo Gualdoni, Tomás L. Gómez, Patrick Schmeer, Lasse-Teist Jensen, Eddy Muyllaert, David Boyd, L’ubomír Urbančok, Kei Sugiyasu, Kamil Złoczewski, Kenji Tanabe, Gary W. Billings, T. Davis, Marek Kolasa, Donn R. Starkey, H. Kucakova, Mike Simonsen, Maria Khramtsova, Norimi Yamada, Rie Ueoka, P. Niarchos, Daisaku Nogami, Roger D. Pickard, Junpei Tanaka, Tomohito Ohshima, Kevin Beaulieu, Tonny Vanmunster, Nanae Kunitomi, Jose Ripero, Etienne Morelle, Dustin Crabtree, Makoto Uemura, Sawa Tanaka, Yuichi Soejima, Alexander Baklanov, Hiroshi Itoh, Rudolf Novak, Thomas Krajci, Raul Michel, Pavol A. Dubovsky, Piotr Kedzierski, Michael Richmond, Akira Arai, Krzysztof Mularczyk, Nick James, Hiroyuki Maehara, M. D. Koppelman, Gerry A. Good, Franz-Josef Hambsch, Alexander E. Rosenbush, Arkadiusz Olech, Maksim V. Andreev, R. Ishioka, Natalia Katysheva, Berto Monard, Hidetoshi Iwamatsu, Hiroki Taguchi, Greg Bolt, Hideki Yasui, Wolfgang Kriebel, Lukas Kral, Koichi Morikawa, Drahomir Chochol, Jeremy Shears, Y. Moritani, Kazuhiro Nakajima, Petri Kehusmaa, Gianluca Masi, Gordon Garradd, Petri Tikkanen, Hiroyuki Ohashi, R. Santallo, Yenal Ogmen, James Bedient, Timo Kinnunen, Elena P. Pavlenko, Mitsuo Koizumi, Christopher Stockdale, Wm Mack Julian, Brian Martin, Ken-ichi Douzu, Kosmas Gazeas, Yasuo Sano, William Liller, Gary Poyner, A. Retter, Maciej Reszelski, G. Pojmanski, Yuichi Nishi, I. M. Volkov, Jani Virtanen, Stacey Davis, Irina Voloshina, Denis Buczynski, Kaori Kubota, Pierre de Ponthiere, Bart Staels, Seiichiro Kiyota, Toshihiro Omodaka, Peter Nelson, Nobuyuki Sakai, Marco Fiaschi, Akira Imada, Steve Brady, Neil Butterworth, Kenji Kunihiro, Igor Kudzej, Tim Crawford |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Publications of the Astronomical Society of Japan. 61:S395-S616 |
| ISSN: |
2053-051X
0004-6264 |
| DOI: |
10.1093/pasj/61.sp2.s395 |
| Popis: |
We systematically surveyed period variations of superhumps in SU UMa-type dwarf novae based on newly obtained data and past publications. In many systems, the evolution of superhump period are found to be composed of three distinct stages: early evolutionary stage with a longer superhump period, middle stage with systematically varying periods, final stage with a shorter, stable superhump period. During the middle stage, many systems with superhump periods less than 0.08 d show positive period derivatives. Contrary to the earlier claim, we found no clear evidence for variation of period derivatives between superoutburst of the same object. We present an interpretation that the lengthening of the superhump period is a result of outward propagation of the eccentricity wave and is limited by the radius near the tidal truncation. We interpret that late stage superhumps are rejuvenized excitation of 3:1 resonance when the superhumps in the outer disk is effectively quenched. Many of WZ Sge-type dwarf novae showed long-enduring superhumps during the post-superoutburst stage having periods longer than those during the main superoutburst. The period derivatives in WZ Sge-type dwarf novae are found to be strongly correlated with the fractional superhump excess, or consequently, mass ratio. WZ Sge-type dwarf novae with a long-lasting rebrightening or with multiple rebrightenings tend to have smaller period derivatives and are excellent candidate for the systems around or after the period minimum of evolution of cataclysmic variables (abridged).
Comment: 239 pages, 225 figures, PASJ accepted |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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