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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. II the second year (2009-2010)
Publications of the Astronomical Society of Japan, Volume 62, No. 6, Year 2010
Notification
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Description
Continued from Kato et al. (2009, PASJ, 61, S395), we collected the times of superhump maxima for 68 SU UMa-type dwarf novae, mainly observed during the 2009-2010 season. The newly obtained data confirmed the basic findings reported in Kato et al. (ibid.): the presence of stages A-C and the predominance of positive period derivatives during stage B in systems with superhump periods shorter than 0.07 d. There was a systematic difference in the period derivatives for the systems with superhump periods longer than 0.075 d between this study and Kato et al. (ibid.). We suggest that this difference was possibly caused by a relative lack of frequently outbursting SU UMa-type dwarf novae in this period regime in the present study. We recorded a strong beat phenomenon during the 2009 superoutburst of IY UMa. A close correlation between the beat period and the superhump period suggests that the changing angular velocity of the apsidal motion of the elliptical disk is responsible for the variation of the superhump periods. We also described three new WZ Sge-type objects with established early superhumps and one with likely early superhumps. We suggest that two systems, VX For and EL UMa, are WZ Sge-type dwarf novae with multiple rebrightenings. The O -C variation in OT J213806.6+261957 suggests that the frequent absence of rebrightenings in very short-Porb objects can be the result of a sustained superoutburst plateau at the epoch when usual SU UMa-type dwarf novae return to quiescence, preceding a rebrightening. We also present a formulation for a variety of Bayesian extensions to traditional period analyses. © 2010. Astronomical Society of Japan.
Authors & Co-Authors
Kato, Taichi
Japan, Kyoto
Kyoto University
Maehara, Hiroyuki
Japan, Kyoto
Kyoto University
Uemura, Makoto
Japan, Higashihiroshima
Hiroshima University
Henden, Arne A.
United States, Cambridge
American Association of Variable Star Observers
de Miguel, Enrique
Spain, Huelva
Universidad de Huelva
Spain, Matalascanas
Center for Backyard Astrophysics
Miller, Ian
United Kingdom, Ilston
Furzehill House
Dubovský, Pavol A.
Slovakia, Mierová
Vihorlat Observatory
Kudzej, Igor
Slovakia, Mierová
Vihorlat Observatory
Kiyota, Seiichiro
Japan, Tsukuba
Variable Star Observers League in Japan Vsolj
Hambsch, Franz Josef
France, Bailleau L'evêque
Groupe Européen D'observations Stellaires Geos
Germany, Berlin
Bundesdeutsche Arbeitsgemeinschaft Für Veränderliche Sterne Bav
Belgium, Mol
Vereniging Voor Sterrenkunde Vvs
Tanabe, Kenji
Japan, Okayama
Okayama University of Science
Imamura, Kazuyoshi
Japan, Okayama
Okayama University of Science
Kunitomi, Nanae
Japan, Okayama
Okayama University of Science
Takagi, Ryosuke
Japan, Okayama
Okayama University of Science
Nose, Mikiha
Japan, Okayama
Okayama University of Science
Akazawa, Hidehiko
Japan, Okayama
Okayama University of Science
Masi, Gianluca
Italy, Ceccano
Virtual Telescope Project
Nakagawa, Shinichi
Japan, Kashiwara
Osaka Kyoiku University
Iino, Eriko
Japan, Kashiwara
Osaka Kyoiku University
Noguchi, Ryo
Japan, Kashiwara
Osaka Kyoiku University
Matsumoto, Katsura
Japan, Kashiwara
Osaka Kyoiku University
Fujii, Daichi
Japan, Kashiwara
Osaka Kyoiku University
Kobayashi, Hiroshi
Japan, Kashiwara
Osaka Kyoiku University
Ogura, Kazuyuki
Japan, Kashiwara
Osaka Kyoiku University
Ohtomo, Sachi
Japan, Kashiwara
Osaka Kyoiku University
Yamashita, Kousei
Japan, Kashiwara
Osaka Kyoiku University
Yanagisawa, Hirofumi
Japan, Kashiwara
Osaka Kyoiku University
Itoh, Hiroshi
Japan, Hachioji
Vsolj
Bolt, Greg
Unknown Affiliation
Monard, Berto L.A.G.
South Africa, Pretoria
Bronberg Observatory
Ohshima, Tomohito
Japan, Kyoto
Kyoto University
Shears, Jeremy H.
United Kingdom, Tarporley
Pemberton
Ruiz, Javier
Spain, Valderredible
Centro de Investigación Del Medio Ambiente (cima)
Imada, Akira
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Oksanen, Arto
Finland, Palokka
Jyvaskylan Sirius ry
Nelson, Peter R.
Australia, Ellinbank
Rmb 2493
Gomez, Tomas
Spain, Getafe
Universidad Carlos Iii de Madrid
Staels, Bart
United States, Cambridge
American Association of Variable Star Observers
Belgium, Hofstade
American Association of Variable Star Observers (aavso)
Boyd, David R.S.
United Kingdom, Tonbridge
British Astronomical Association
Voloshina, Irina
Russian Federation, Moscow
Lomonosov Moscow State University
Krajci, Thomas
United States, Cloudcroft
Center for Backyard Astrophysics new Mexico
Crawford, Timothy R.
United States, Arch Cape
Arch Cape Observatory
Stockdale, Chris J.
Unknown Affiliation
Richmond, Michael W.
United States, Rochester
Rochester Institute of Technology
Morelle, Etienne
Unknown Affiliation
Novák, Rudolf
Czech Republic, Brno
Brno University of Technology, Faculty of Civil Engineering
Nogami, Daisaku
Japan, Kyoto
Kyoto University
Ishioka, Ryoko
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Brady, Steve
Unknown Affiliation
Simonsen, Mike
United States, Imlay City
Aavso
Pavlenko, Elena P.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Ringwald, Frederick A.
United States, Fresno
California State University, Fresno
Kuramoto, Tetsuya
Japan, Kyoto
Kyoto University
Miyashita, Atsushi
Japan, Musashino
Seikei High School
Pickard, Roger D.
United Kingdom, Tonbridge
British Astronomical Association
Hynek, Tomáš
Czech Republic, Ostrava
Vsb – Technical University of Ostrava
Dvorak, Shawn W.
United States, Clermont
Rolling Hills Observatory
Stubbings, Rod
Australia, Warragul
Tetoora Observatory
Muyllaert, Eddy
Belgium, Boutersem
Vereniging Voor Sterrenkunde (vvs)
Statistics
Citations: 59
Authors: 59
Affiliations: 37
Identifiers
Doi:
10.1093/pasj/62.6.1525
ISSN:
00046264
Study Design
Cross Sectional Study
Study Approach
Quantitative