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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. V. the fifth year (2012-2013)
Publications of the Astronomical Society of Japan, Volume 66, No. 2, Article 30, Year 2014
Notification
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Description
Continuing the project described in Kato et al. (2009, PASJ, 61, S395), we collected times of superhump maxima for SU UMa-type dwarf novae mainly observed during the 2012-2013 season. We found three objects (V444 Peg, CSS J203937, and MASTER J212624) having strongly positive period derivatives despite the long orbital period (Porb). By using the period of growing stage (stage A) superhumps, we obtained mass ratios for six objects. We characterized nine new WZ Sge-type dwarf novae. We made a pilot survey of the decline rate in the slowly fading parts of SU UMa-type and WZ Sge-type outbursts. The decline time scale was found to generally follow an expected Porb1/4 dependence, and WZ Sge-type outbursts also generally follow this trend. There are some objects which show slower decline rates, and we consider these objects good candidates for period bouncers. We also studied unusual behavior in some objects, including BK Lyn which made a transition from an ER UMa-type state to a novalike (standstill) state in 2013, and unusually frequent occurrences of superoutbursts in NY Ser and CR Boo. We applied the least absolute shrinkage and selection operator (Lasso) power spectral analysis, which has been proven to be very effective in analyzing the Kepler data, to the ground-based photometry of BK Lyn, and detected a dramatic disappearance of the signal of negative superhumps in 2013. We suggested that the mass-transfer rates did not strongly vary between the ER UMa-type state and novalike state in BK Lyn, and this transition was less likely caused by a systematic variation of the mass-transfer rate. © 2014 The Author.
Authors & Co-Authors
Kato, Taichi
Japan, Kyoto
Kyoto University
Hambsch, Franz Josef
France, 28300 Bailleau L'evêque
Groupe Europeen D'observations Stellaires Geos
Germany, 12169 Berlin
Bundesdeutsche Arbeitsgemeinschaft Für Veränderliche Sterne Bav
Belgium, 2400 Mol
Vereniging Voor Sterrenkunde Vvs
Maehara, Hiroyuki
Japan, Tokyo
The University of Tokyo
Japan, Kyoto
Kyoto University
Masi, Gianluca
Italy, 03023 Ceccano (fr)
Virtual Telescope Project
Nocentini, Francesca
Italy, 03023 Ceccano (fr)
Virtual Telescope Project
Dubovský, Pavol A.
Slovakia, Humenne
Vihorlat Observatory
Kudzej, Igor
Slovakia, Humenne
Vihorlat Observatory
Imamura, Kazuyoshi
Japan, Okayama
Okayama University of Science
Ogi, Minako
Japan, Okayama
Okayama University of Science
Tanabe, Kenji
Japan, Okayama
Okayama University of Science
Akazawa, Hidehiko
Japan, Okayama
Okayama University of Science
Krajci, Thomas
United States, Cloudcroft, nm 83117
Center for Backyard Astrophysics - new Mexico
Miller, Ian
United Kingdom, Ilston, Swansea, Sa2 7le
Furzehill House
de Miguel, Enrique
Spain, Huelva
Universidad de Huelva
Spain, 21760 Almonte-huelva
Center for Backyard Astrophysics
Henden, Arne A.
United States, Cambridge
American Association of Variable Star Observers
Noguchi, Ryo
Japan, Kashiwara
Osaka Kyoiku University
Ishibashi, Takehiro
Japan, Kashiwara
Osaka Kyoiku University
Ono, Rikako
Japan, Kashiwara
Osaka Kyoiku University
Kawabata, Miho
Japan, Kashiwara
Osaka Kyoiku University
Kobayashi, Hiroshi
Japan, Kashiwara
Osaka Kyoiku University
Sakai, Daisuke
Japan, Kashiwara
Osaka Kyoiku University
Nishino, Hirochika
Japan, Kashiwara
Osaka Kyoiku University
Furukawa, Hisami
Japan, Kashiwara
Osaka Kyoiku University
Masumoto, Kazunari
Japan, Kashiwara
Osaka Kyoiku University
Matsumoto, Katsura
Japan, Kashiwara
Osaka Kyoiku University
Littlefield, Colin
United States, Notre Dame
University of Notre Dame
Ohshima, Tomohito
Japan, Kyoto
Kyoto University
Nakata, Chikako
Japan, Kyoto
Kyoto University
Honda, Satoshi
Japan, Takayama, Agatsuma, Gunma 377-0702
Gunma Astronomical Observatory
Japan, Kobe
University of Hyogo
Kinugasa, Kenzo
Japan, Takayama, Agatsuma, Gunma 377-0702
Gunma Astronomical Observatory
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Hashimoto, Osamu
Japan, Takayama, Agatsuma, Gunma 377-0702
Gunma Astronomical Observatory
Stein, William
Unknown Affiliation
Pickard, Roger D.
United Kingdom, Tonbridge
British Astronomical Association
Kiyota, Seiichiro
Japan, Kamagaya, Chiba 273-0126
Variable Star Observers League in Japan Vsolj
Pavlenko, Elena P.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Antonyuk, Oksana I.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Baklanov, Alex V.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Antoniuk, K. А.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Samsonov, Denis
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Pit’, Nikolaj V.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Sosnovskij, Aleksei A.
Ukraine, Kyiv
Taras Shevchenko National University of Kyiv
Oksanen, Arto
Finland, Hankasalmi
Hankasalmen Observatorion
Harlingten, Caisey
United Kingdom, Erpingham, Norfolk-nr11 7qx
Searchlight Observatory Network
Tyyskä, Jenni
Finland, Fi-40101 Jyväskylä
Jyväskylän Lyseo Upper Secondary School
Monard, Berto L.A.G.
South Africa, Pretoria
Bronberg Observatory
South Africa, Calitzdorp 6660
Center for Backyard Astronomy Kleinkaroo
Shugarov, S. Yu
Russian Federation, Moscow
Lomonosov Moscow State University
Chochol, D.
Japan, 05960, Tatranska Lomnica
Slovak Academy of Sciences
Kasai, Kiyoshi
Unknown Affiliation
Maeda, Yutaka
Unknown Affiliation
Hirosawa, Kenji
Unknown Affiliation
Itoh, Hiroshi
Japan, Hachioji, Tokyo 192-0153
Vsolj
Sabo, Richard
Unknown Affiliation
Ulowetz, Joseph H.
United States, East Peoria
Center for Backyard Astrophysics, Illinois
Morelle, Etienne
Unknown Affiliation
Michel, R.
Mexico, Mexico
Universidad Nacional Autónoma de México
Suarez, Genaro
Mexico, Mexico
Universidad Nacional Autónoma de México
James, Nick
Unknown Affiliation
Dvorak, Shawn W.
United States, Clermont, fl 34711
Rolling Hills Observatory
Voloshina, Irina
Russian Federation, Moscow
Lomonosov Moscow State University
Richmond, Michael W.
United States, Rochester
Rochester Institute of Technology
Staels, Bart
United States, Cambridge
American Association of Variable Star Observers
Belgium, Hofstade, Aalst
American Association of Variable Star Observers (aavso)
Boyd, David R.S.
United Kingdom, West-challow, Wantage, Ox12 9tx
Silver Lane
Andreev, Maksim V.
Russian Federation, Moscow
Institute of Astronomy of the Russian Academy of Sciences
Ukraine, Kyiv
National Academy of Sciences of Ukraine
Parakhin, Nikolai
Russian Federation, Moscow
Institute of Astronomy of the Russian Academy of Sciences
Katysheva, N.
Russian Federation, Moscow
Lomonosov Moscow State University
Miyashita, Atsushi
Japan, Musashino, Tokyo 180-8633
Seikei High School
Nakajima, Kazuhiro
Japan, Isato-cho, Kumano, Mie 519-4673
Variable Star Observers League in Japan Vsolj
Bolt, Greg
Unknown Affiliation
Padovan, Stefano
United States, Cambridge
American Association of Variable Star Observers
Nelson, Peter R.
Unknown Affiliation
Starkey, Donn R.
United States, Auburn, in 46706
Dekalb Observatory
Buczynski, Denis
United Kingdom, Scotforth, Lancashire, La2 0rq
Fell Acre
Starr, Peter
Australia, Coonabarabran, Nsw 2357
Warrumbungle Observatory
Goff, William N.
Unknown Affiliation
Denisenko, Denis
Russian Federation, Moscow
Space Research Institute of the Russian Academy of Sciences
Kochanek, Christopher S.
United States, Columbus
The Ohio State University
Shappee, Benjamin J.
United States, Columbus
The Ohio State University
Stanek, Krzysztof Z.
United States, Columbus
The Ohio State University
Prieto, José Luis
United States, Princeton
Princeton University
Itagaki, Kohichi
Japan, Teppo-cho, Yamagata, Yamagata 990-2492
Itagaki Astronomical Observatory
Kaneko, Shizuo
Unknown Affiliation
Stubbings, Rod
Australia, Vic
Tetoora Observatory
Muyllaert, Eddy
Belgium, 3370 Boutersem
Vereniging Voor Sterrenkunde (vvs)
Shears, Jeremy H.
United Kingdom, Bunbury, Tarporley, Cheshire, Cw6 9nr
Pemberton
Schmeer, Patrick
Germany, 66132 Saarbrücken
Bischmisheim
Poyner, Gary
United Kingdom, Kingstanding, Birmingham, B44 0qe
Baa Variable Star Section
Rodríguez-Marco, Miguel
Unknown Affiliation
Statistics
Citations: 87
Authors: 87
Affiliations: 51
Identifiers
Doi:
10.1093/pasj/psu014
ISSN:
00046264
e-ISSN:
2053051X
Study Design
Cross Sectional Study
Study Approach
Quantitative