RZ Leonis Minoris bridging between ER Ursae Majoris-type dwarf nova and nova-like system
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- Taichi Kato
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan
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- Ryoko Ishioka
- 2Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan
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- Keisuke Isogai
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan
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- Mariko Kimura
- 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Kyoto 606-8502, Japan
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- Akira Imada
- 3Kwasan and Hida Observatories, Kyoto University, 17 Ohmine-cho Kita Kazan, Yamashina-ku, Kyoto, Kyoto 607-8471, Japan
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- Ian Miller
- 4Furzehill House, Ilston, Swansea, SA2 7LE, UK
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- Kazunari Masumoto
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Hirochika Nishino
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Naoto Kojiguchi
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Miho Kawabata
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Daisuke Sakai
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Yuki Sugiura
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Hisami Furukawa
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Kenta Yamamura
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Hiroshi Kobayashi
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Katsura Matsumoto
- 5Osaka Kyoiku University, 4-698-1 Asahigaoka, Kashiwara, Osaka 582-8582, Japan
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- Shiang-Yu Wang
- 2Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan
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- Yi Chou
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Chow-Choong Ngeow
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Wen-Ping Chen
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Neelam Panwar
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Chi-Sheng Lin
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Hsiang-Yao Hsiao
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Jhen-Kuei Guo
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Chien-Cheng Lin
- 6Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan
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- Chingis Omarov
- 7Fessenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
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- Anatoly Kusakin
- 7Fessenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
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- Maxim Krugov
- 7Fessenkov Astrophysical Institute, Observatory 23, Almaty 050020, Kazakhstan
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- Donn R. Starkey
- 8DeKalb Observatory, H63, 2507 County Road 60, Auburn, IN 46706, USA
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- Elena P. Pavlenko
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Kirill A. Antonyuk
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Aleksei A. Sosnjvskij
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Oksana I. Antonyuk
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Nikolai V. Pit
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Alex V. Baklanov
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Julia V. Babina
- 9Federal State Budget Scientific Institution “Crimean Astrophysical Observatory of RAS”, Nauchny 298409, Republic of Crimea
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- Hiroshi Itoh
- 10Variable Star Observers League in Japan (VSOLJ), 1001-105 Nishiterakata, Hachioji, Tokyo 192-0153, Japan
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- Stefano Padovan
- 11American Association of Variable Star Observers, 49 Bay State Rd., Cambridge, MA 02138, USA
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- Hidehiko Akazawa
- 12Department of Biosphere-Geosphere System Science, Faculty of Informatics, Okayama University of Science, 1-1 Ridai-cho, Okayama, Okayama 700-0005, Japan
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- Stella Kafka
- 11American Association of Variable Star Observers, 49 Bay State Rd., Cambridge, MA 02138, USA
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- Enrique de Miguel
- 13Departamento de Ciencias Integradas, Facultad de Ciencias Experimentales, Universidad de Huelva, 21071 Huelva, Spain
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- Roger D. Pickard
- 15The British Astronomical Association, Variable Star Section (BAA VSS), Burlington House, Piccadilly, London, W1J 0DU, UK
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- Seiichiro Kiyota
- 17VSOLJ, 7-1 Kitahatsutomi, Kamagaya, Chiba 273-0126, Japan
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- Sergey Yu. Shugarov
- 18Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetsky Ave., 13, Moscow 119992, Russia
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- Drahomir Chochol
- 19Astronomical Institute of the Slovak Academy of Sciences, 05960 Tatranska Lomnica, Slovakia
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- Viktoriia Krushevska
- 20Main Astronomical Observatory of the National Academy of Sciences of Ukraine, 27 Akademika Zabolotnoho ave., 03680 Kyiv, Ukraine
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- Matej Sekeráš
- 19Astronomical Institute of the Slovak Academy of Sciences, 05960 Tatranska Lomnica, Slovakia
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- Olga Pikalova
- 21Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
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- Richard Sabo
- 222336 Trailcrest Dr., Bozeman, MT 59718, USA
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- Pavol A. Dubovsky
- 23Vihorlat Observatory, Mierova 4, 06601 Humenne, Slovakia
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- Igor Kudzej
- 23Vihorlat Observatory, Mierova 4, 06601 Humenne, Slovakia
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- Joseph Ulowetz
- 24Center for Backyard Astrophysics Illinois, Northbrook Meadow Observatory, 855 Fair Ln, Northbrook, IL 60062, USA
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- Shawn Dvorak
- 25Rolling Hills Observatory, 1643 Nightfall Drive, Clermont, FL 34711, USA
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- Geoff Stone
- 11American Association of Variable Star Observers, 49 Bay State Rd., Cambridge, MA 02138, USA
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- Tamás Tordai
- 26Polaris Observatory, Hungarian Astronomical Association, Laborc utca 2/c, 1037 Budapest, Hungary
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- Franky Dubois
- 27Public Observatory Astrolab Iris, Verbrandemolenstraat 5, B 8901 Zillebeke, Belgium
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- Ludwig Logie
- 27Public Observatory Astrolab Iris, Verbrandemolenstraat 5, B 8901 Zillebeke, Belgium
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- Steve Rau
- 27Public Observatory Astrolab Iris, Verbrandemolenstraat 5, B 8901 Zillebeke, Belgium
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- Siegfried Vanaverbeke
- 27Public Observatory Astrolab Iris, Verbrandemolenstraat 5, B 8901 Zillebeke, Belgium
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- Tonny Vanmunster
- 28Center for Backyard Astrophysics Belgium, Walhostraat 1A, B-3401 Landen, Belgium
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- Arto Oksanen
- 29Hankasalmi Observatory, Vertaalantie 116, FIN-40500 Hankasalmi, Finland
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- Yutaka Maeda
- 30Kaminishiyamamachi 12-14, Nagasaki, Nagasaki 850-0006, Japan
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- Kiyoshi Kasai
- 31Baselstrasse 133D, CH-4132 Muttenz, Switzerland
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- Natalia Katysheva
- 18Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetsky Ave., 13, Moscow 119992, Russia
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- Etienne Morelle
- 329 rue Vasco de GAMA, 59553 Lauwin Planque, France
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- Vitaly V. Neustroev
- 33Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, FIN-21500 Piikkiö, Finland
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- George Sjoberg
- 11American Association of Variable Star Observers, 49 Bay State Rd., Cambridge, MA 02138, USA
説明
<jats:title>Abstract</jats:title><jats:p>We observed RZ LMi, which is renowned for its extremely short (∼19 d) supercycle and is a member of a small, unusual class of cataclysmic variables called ER UMa-type dwarf novae, in 2013 and 2016. In 2016, the supercycles of this object substantially lengthened in comparison to the previous measurements to 35, 32, and 60 d for three consecutive superoutbursts. We consider that the object virtually experienced a transition to the nova-like state (permanent superhumper). This observed behavior reproduced the prediction of the thermal-tidal instability model extremely well. We detected a precursor in the 2016 superoutburst and detected growing (stage A) superhumps with a mean period of 0.0602(1) d in 2016 and in 2013. Combined with the period of superhumps immediately after the superoutburst, the mass ratio is not as small as in WZ Sge-type dwarf novae, having orbital periods similar to RZ LMi. By using least absolute shrinkage and selection operator (Lasso) two-dimensional power spectra, we detected possible negative superhumps with a period of 0.05710(1) d. We estimated an orbital period of 0.05792 d, which suggests a mass ratio of 0.105(5). This relatively large mass ratio is even above that of ordinary SU UMa-type dwarf novae, and it is also possible that the exceptionally high mass-transfer rate in RZ LMi may be a result of a stripped secondary with an evolved core in a system evolving toward an AM CVn-type object.</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 68 107-, 2016-10-27
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360567184688361472
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- ISSN
- 2053051X
- 00046264
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- データソース種別
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- Crossref
- KAKEN