Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II The Second Year (2009–2010)
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- Taichi Kato
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 tkato@kusastro.kyoto-u.ac.jp
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- Hiroyuki Maehara
- 2Kwasan and Hida Observatories, Kyoto University, Yamashina-ku, Kyoto 607-8471
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- Makoto Uemura
- 3Astrophysical Science Center, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526
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- Arne Henden
- 4American Association of Variable Star Observers (AAVSO), 49 Bay State Rd., Cambridge, MA 02138, USA
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- Enrique De Miguel
- 5Departamento de Física Aplicada, Facultad de Ciencias Experimentales, Universidad de Huelva, 21071 Huelva, Spain
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- Ian Miller
- 7Furzehill House, Ilston, Swansea, SA2 7LE, UK
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- Pavol A. Dubovsky
- 8Vihorlat Observatory, Mierova 4, Humenne, Slovakia
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- Igor Kudzej
- 8Vihorlat Observatory, Mierova 4, Humenne, Slovakia
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- Seiichiro Kiyota
- 9Variable Star Observers League in Japan (VSOLJ), 405-1003 Matsushiro, Tsukuba, Ibaraki 305-0035
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- Franz-Josef Hambsch
- 10Groupe Européen d'Observations Stellaires (GEOS), 23 Parc de Levesville, 28300 Bailleau l'Evêque, France
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- Kenji Tanabe
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Kazuyoshi Imamura
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Nanae Kunitomi
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Ryosuke Takagi
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Mikiha Nose
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Hidehiko Akazawa
- 13Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005
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- Gianluca Masi
- 14The Virtual Telescope Project, Via Madonna del Loco 47, 03023 Ceccano (FR), Italy
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- Shinichi Nakagawa
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Eriko Iino
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Ryo Noguchi
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Katsura Matsumoto
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Daichi Fujii
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Hiroshi Kobayashi
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Kazuyuki Ogura
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Sachi Ohtomo
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Kousei Yamashita
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Hirofumi Yanagisawa
- 15Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582
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- Hiroshi Itoh
- 16VSOLJ, 1001-105 Nishiterakata, Hachioji, Tokyo 192-0153
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- Greg Bolt
- 17Camberwarra Drive, Craigie, Western Australia 6025, Australia
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- Berto Monard
- 18Bronberg Observatory, Center for Backyard Astronomy Pretoria, PO Box 11426, Tiegerpoort 0056, South Africa
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- Tomohito Ohshima
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 tkato@kusastro.kyoto-u.ac.jp
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- Jeremy Shears
- 19“Pemberton”, School Lane, Bunbury, Tarporley, Cheshire, CW6 9NR, UK
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- Javier Ruiz
- 20Observatory of Cantabria, Centro de Investigación del Medio Ambiente (CIMA) Instituto de Física de Cantabria (IFCA), Agrupación Astronómica Cántabra (AAC), Ctra. de Rocamundo s/n, Valderredible, Cantabria, Spain
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- Akira Imada
- 21Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232
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- Arto Oksanen
- 22Nyrola Observatory, Jyvaskylan Sirius ry, Vertaalantie 419, FI-40270 Palokka, Finland
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- Peter Nelson
- 23RMB 2493, Ellinbank 3820, Australia
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- Tomas L. Gomez
- 24ICMAT (CSIC-UAM-UC3M-UCM), Serrano 113bis, 28006 Madrid, Spain
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- Bart Staels
- 4American Association of Variable Star Observers (AAVSO), 49 Bay State Rd., Cambridge, MA 02138, USA
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- David Boyd
- 26Silver Lane, West Challow, Wantage, OX12 9TX, UK
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- Irina B. Voloshina
- 27Sternberg Astronomical Institute, Moscow University, Universitetskiy prospekt 13, Moscow 119992, Russia
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- Thomas Krajci
- 28Astrokolkhoz Observatory, Center for Backyard Astrophysics (New Mexico), PO Box 1351, Cloudcroft, NM 83117, USA
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- Tim Crawford
- 29Arch Cape Observatory, 79916 W. Beach Road, Arch Cape, OR 97102, USA
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- Chris Stockdale
- 318 Matta Drive, Churchill, Victoria 3842, Australia
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- Michael Richmond
- 32Physics Department, Rochester Institute of Technology, Rochester, NY 14623, USA
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- Etienne Morelle
- 339 rue Vasco de GAMA, 59553 Lauwin Planque, France
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- Rudolf NovÁk
- 34Institute of Computer Science, Faculty of Civil Engineering, Brno University of Technology, 602 00 Brno, Czech Republic
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- Daisaku Nogami
- 2Kwasan and Hida Observatories, Kyoto University, Yamashina-ku, Kyoto 607-8471
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- Ryoko Ishioka
- 35Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA
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- Steve Brady
- 365 Melba Drive, Hudson, NH 03051, USA
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- Mike Simonsen
- 37AAVSO, C. E. Scovil Observatory, 2615 S. Summers Rd., Imlay City, MI 48444, USA
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- Elena P. Pavlenko
- 38Crimean Astrophysical Observatory, 98409, Nauchny, Crimea, Ukraine
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- Frederick A. Ringwald
- 39Department of Physics, California State University, Fresno, 2345 East San Ramon Avenue, MS MH37, Fresno, CA 93740-8031, USA
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- Tetsuya Kuramoto
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502 tkato@kusastro.kyoto-u.ac.jp
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- Atsushi Miyashita
- 40Seikei Meteorological Observatory, Seikei High School, 3-3-1 Kichijoji-Kita-machi, Musashino, Tokyo 180-8633
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- Roger D. Pickard
- 30The British Astronomical Association, Variable Star Section (BAA VSS), Burlington House, Piccadilly, London, W1J 0DU, UK
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- Tomáš Hynek
- 42Project Eridanus, Observatory and Planetarium of Johann Palisa, VSB – Technical University Ostrava, Trida 17. Listopadu 15, Ostrava – Poruba 708 33, Czech Republic
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- Shawn Dvorak
- 43Rolling Hills Observatory, 1643 Nightfall Drive, Clermont, FL 34711, USA
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- Rod Stubbings
- 44Tetoora Observatory, Tetoora Road, Victoria, Australia
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- Eddy Muyllaert
- 45Vereniging Voor Sterrenkunde (VVS), Moffelstraat 13, 3370 Boutersem, Belgium
抄録
<jats:title>Abstract</jats:title> <jats:p>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$+$261957 suggests that the frequent absence of rebrightenings in very short-$P_{\rm orb}$ 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.</jats:p>
収録刊行物
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- Publications of the Astronomical Society of Japan
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Publications of the Astronomical Society of Japan 62 (6), 1525-1584, 2010-12-25
Oxford University Press (OUP)