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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Survey of period variations of superhumps in su UMa-type dwarf novae
Publications of the Astronomical Society of Japan, Volume 61, No. SPEC. ISS. 2, Year 2009
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Description
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 the superhump period is found to be composed of three distinct stages: an early evolutionary stage with a longer superhump period, a middle stage with systematically varying periods, and a final stage with a shorter, stable superhump period. During the middle stage, many systems with superhump periods of less than 0.08 d show positive period derivatives. We present observational characteristics of these stages and give greatly improved statistics. Contrary to an earlier claim, we found no clear evidence for a variation of period derivatives among different superoutbursts of the same object. We present an interpretation that the lengthening of the superhump period is a result of the outward propagation of an eccentricity wave, which is limited by the radius near the tidal truncation. We interpret that late-stage superhumps are rejuvenated excitation of a 3:1 resonance when superhumps in the outer disk are effectively quenched. The general behavior of the period variation, particularly in systems with short orbital periods, appears to follow a scenario proposed in Kato, Maehara, and Monard (2008, PASJ, 60, L23). We also present an observational summary of WZ Sge-type dwarf novae. Many of them have shown long-enduring superhumps during a post-superoutburst stage having longer periods 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 with the 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 candidates for those systems around or after the period minimum of evolution of cataclysmic variables. © 2009. Astronomical Society of Japan.
Authors & Co-Authors
Kato, Taichi
Japan, Kyoto
Kyoto University
Imada, Akira
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Uemura, Makoto
Japan, Higashihiroshima
Hiroshima University
Nogami, Daisaku
Japan, Kyoto
Kyoto University
Maehara, Hiroyuki
Japan, Kyoto
Kyoto University
Ishioka, Ryoko
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Baba, Hajime
Japan, Sagamihara
Jaxa Institute of Space and Astronautical Science
Matsumoto, Katsura
Japan, Kashiwara
Osaka Kyoiku University
Iwamatsu, Hidetoshi
Japan, Kyoto
Kyoto University
Kubota, Kaori
Japan, Kyoto
Kyoto University
Sugiyasu, Kei
Japan, Kyoto
Kyoto University
Soejima, Yuichi
Japan, Kyoto
Kyoto University
Moritani, Yuuki
Japan, Kyoto
Kyoto University
Ohshima, Tomohito
Japan, Kyoto
Kyoto University
Ohashi, Hiroyuki
Japan, Kyoto
Kyoto University
Tanaka, Junpei
Japan, Kyoto
Kyoto University
Sasada, Mahito
Japan, Higashihiroshima
Hiroshima University
Arai, Akira
Japan, Higashihiroshima
Hiroshima University
Nakajima, Kazuhiro
Japan, Kumano
Variable Star Observers League in Japan Vsolj
Kiyota, Seiichiro
Japan, Tsukuba
Vsolj
Tanabe, Kenji
Japan, Okayama
Okayama University of Science
Imamura, Kazuyoshi
Japan, Okayama
Okayama University of Science
Kunitomi, Nanae
Japan, Okayama
Okayama University of Science
Kunihiro, Kenji
Japan, Okayama
Okayama University of Science
Taguchi, Hiroki
Japan, Okayama
Okayama University of Science
Koizumi, Mitsuo
Japan, Okayama
Okayama University of Science
Yamada, Norimi
Japan, Okayama
Okayama University of Science
Nishi, Yuichi
Japan, Okayama
Okayama University of Science
Kida, Mayumi
Japan, Okayama
Okayama University of Science
Tanaka, Sawa
Japan, Okayama
Okayama University of Science
Ueoka, Rie
Japan, Okayama
Okayama University of Science
Yasui, Hideki
Japan, Okayama
Okayama University of Science
Maruoka, Koichi
Japan, Okayama
Okayama University of Science
Henden, Arne A.
United States, Cambridge
American Association of Variable Star Observers
Oksanen, Arto
Finland, Palokka
Jyvaskylan Sirius ry
Moilanen, Marko
Finland, Palokka
Jyvaskylan Sirius ry
Tikkanen, Petri
Finland, Palokka
Jyvaskylan Sirius ry
Mika, A. H.O.
Finland, Palokka
Jyvaskylan Sirius ry
Monard, Berto L.A.G.
South Africa, Pretoria
Bronberg Observatory
Itoh, Hiroshi
Japan, Hachioji
Vsolj
Dubovský, Pavol A.
Slovakia, Humenne
Vihorlat Observatory
Kudzej, Igor
Slovakia, Humenne
Vihorlat Observatory
Dancikova, Radka
United States, Andover
Phillips Academy Andover
Vanmunster, Tonny
Belgium, Landen
Center for Backyard Astrophysics Belgium
Pietz, Jochen
Unknown Affiliation
Bolt, Greg
Unknown Affiliation
Boyd, David R.S.
Unknown Affiliation
Nelson, Peter R.
Australia, Ellinbank
Rmb 2493
Krajci, Thomas
United States, Cloudcroft
Center for Backyard Astrophysics new Mexico
Cook, Lewis M.
United States, Concord
Center for Backyard Astrophysics Concord
Torii, Ken'ichi N.Ichi
Japan, Suita
Osaka University
Starkey, Donn R.
United States, Auburn
H63
Shears, Jeremy H.
United Kingdom, Tarporley
Pemberton
Jensen, Lasse Teist
Unknown Affiliation
Masi, Gianluca
Italy, Ceccano
Virtual Telescope Project
Hynek, Tomáš
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Novák, Rudolf
Czech Republic, Brno
Brno University of Technology, Faculty of Civil Engineering
Kocián, R.
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Král, L.
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Kuc̀áková, Hana
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Kolasa, Marek
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Šťastný, Petr
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Staels, Bart
United States, Cambridge
American Association of Variable Star Observers
Belgium, Hofstade
American Association of Variable Star Observers (aavso)
Miller, Ian
United Kingdom, Ilston
Furzehill House
Sano, Yasuo
United States, Juni-jo Minami
Vsolj
Ponthière, Pierre D.E.
Belgium, Profondeville
American Association of Variable Star Observers (aavso)
Miyashita, Atsushi
Japan, Musashino
Seikei High School
Crawford, Timothy R.
United States, Arch Cape
Arch Cape Observatory
Brady, Steve
Unknown Affiliation
Santallo, Roland
French Polynesia, Tahiti
Southern Stars Observatory
Richards, Tom
Australia, Eltham
Woodridge Observatory
Martin, Brian E.
Canada, Edmonton
The King's University College
Buczynski, Denis
United Kingdom, Scotforth
Conder Brow
Richmond, Michael W.
United States, Rochester
Rochester Institute of Technology
Kern, Jim
United States, Rochester
Rochester Institute of Technology
Davis, Stacey
United States, Rochester
Rochester Institute of Technology
Crabtree, Dustin
United States, Rochester
Rochester Institute of Technology
Beaulieu, Kevin
United States, Rochester
Rochester Institute of Technology
Davis, Tracy
United States, Rochester
Rochester Institute of Technology
Aggleton, Matt
United States, Rochester
Rochester Institute of Technology
Morelle, Etienne
Unknown Affiliation
Pavlenko, Elena P.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Andreev, Maksim V.
Russian Federation, Moscow
Institute of Astronomy of the Russian Academy of Sciences
Baklanov, Alex V.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Koppelman, Michael D.
United States, Minneapolis
University of Minnesota Twin Cities
Billings, Gary
Unknown Affiliation
Urbančok, L'ubomír
Slovakia, Sid
Šíd Astronomical Observatory
Öǧmen, Yenal
Cyprus, Gecitkale
Green Island Observatory
Heathcote, Bernard
Australia, Glenhope
Barfold Observatory
Gomez, Tomas
Spain, Getafe
Universidad Carlos Iii de Madrid
Voloshina, Irina
Russian Federation, Moscow
Lomonosov Moscow State University
Retter, Alon
Israel, Shoham
86a/6 Hamaccabim St.
Mularczyk, Krzysztof
Poland, Warsaw
University of Warsaw
Złoczewski, Kamil
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Olech, Arkadiusz
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Kedzierski, Piotr
Poland, Warsaw
University of Warsaw
Pickard, Roger D.
United Kingdom, Tonbridge
British Astronomical Association
United Kingdom, Leominster
Shobdon
Stockdale, Chris J.
Unknown Affiliation
Virtanen, Jani
Unknown Affiliation
Morikawa, Koichi
Japan, Yakage
468-3 Satoyamada
Statistics
Citations: 100
Authors: 100
Affiliations: 49
Identifiers
Doi:
10.1093/pasj/61.sp2.s395
ISSN:
00046264
Study Design
Cross Sectional Study
Study Approach
Quantitative