Related papers: Increasing supercycle lengths of active SU UMa-typ…

On supercycle lengths of active SU UMa stars

We performed a detailed analysis of extensive photometric observations of a sample of most active dwarf novae, that is SU UMa stars which are characterised by supercycle lengths shorter than 120 days. We found the observational evidence…

Solar and Stellar Astrophysics · Physics 2015-06-15 M. Otulakowska-Hypka , A. Olech

Transient behavior of three SU UMa-type dwarf novae; AR Pic, QW Ser and V521 Peg

Changes in the supercycle lengths of some SU UMa-type dwarf novae have been detected by other studies, and indicate that the mass transfer rates noticeably decrease over time. We investigated the supercycle lengths of three SU UMa-type…

Solar and Stellar Astrophysics · Physics 2022-05-04 Hélène Szegedi , Philip A. Charles , Pieter J. Meintjes , Alida Odendaal

Observation of ER UMa Stars

ER UMa stars are a recently recognized small subgroup of SU UMa-type dwarf novae, which are characterized by the extremely high outburst frequency and short (19--48 d) supercycles. From the current thermal-tidal disk instability scheme,…

Solar and Stellar Astrophysics · Physics 2013-01-16 Taichi Kato , Daisaku Nogami , Hajime Baba , Seiji Masuda , Katsura Matsumoto , Chatief Kunjaya

Photometric study of new southern SU UMa-type dwarf novae - II: Authentication of BF Ara as a Normal SU UMa-type Dwarf Nova with the Shortest Supercycle

We photometrically observed the 2002 August long outburst of BF Ara. The observation for the first time unambiguously detected superhumps (average period 0.08797(1) d), qualifying BF Ara as a genuine SU UMa-type dwarf nova. An analysis of…

Astrophysics · Physics 2009-11-07 T. Kato , G. Bolt , P. Nelson , B. Monard , R. Stubbings , A. Pearce , H. Yamaoka , T. Richards

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)

Continuing the project described by Kato et al. (2009a, arXiv:0905.1757), 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…

Solar and Stellar Astrophysics · Physics 2016-04-20 Taichi Kato , Franz-Josef Hambsch , Hiroyuki Maehara , Gianluca Masi , Francesca Nocentini , Pavol A. Dubovsky , Igor Kudzej , Kazuyoshi Imamura , Minako Ogi , Kenji Tanabe , Hidehiko Akazawa , Thomas Krajci , Ian Miller , Enrique de Miguel , Arne Henden , Colin Littlefield , Ryo Noguchi , Takehiro Ishibashi , Rikako Ono , Miho Kawabata , Hiroshi Kobayashi , Daisuke Sakai , Hirochika Nishino , Hisami Furukawa , Kazunari Masumoto , Katsura Matsumoto , Tomohito Ohshima , Chikako Nakata , Satoshi Honda , Kenzo Kinugasa , Osamu Hashimoto , William Stein , Roger D. Pickard , Seiichiro Kiyota , Elena P. Pavlenko , Oksana I. Antonyuk , Aleksei V. Baklanov , Kirill Antonyuk , Denis Samsonov , Nikolaj Pit , Aleksei Sosnovskij , Arto Oksanen , Caisey Harlingten , Jenni Tyyska , Berto Monard , Sergey Yu. Shugarov , Drahomir Chochol , Kiyoshi Kasai , Yutaka Maeda , Kenji Hirosawa , Hiroshi Itoh , Richard Sabo , Joseph Ulowetz , Etienne Morelle , Raul Michel , Genaro Suarez , Nick James , Shawn Dvorak , Irina B. Voloshina , Michael Richmond , Bart Staels , David Boyd , Maksim V. Andreev , Nikolai Parakhin , Natalia Katysheva , Atsushi Miyashita , Kazuhiro Nakajima , Greg Bolt , Stefano Padovan , Peter Nelson , Donn R. Starkey , Denis Buczynski , Peter Starr , William N. Goff , Denis Denisenko , Christopher S. Kochanek , Benjamin Shappee , Krzysztof Z. Stanek , Jose L. Prieto , Koh-ichi Itagaki , Shizuo Kaneko , Rod Stubbings , Eddy Muyllaert , Jeremy Shears , Patrick Schmeer , Gary Poyner , Miguel Rodriguez Marco

V344 Lyr: an unusual large-amplitude SU UMa-type dwarf nova with a short supercycle

We studied the large-amplitude SU UMa-type dwarf nova V344 Lyr. A combination of our observations and reports to VSNET has yielded an extensive coverage of outbursts between 1994 July and 2001 June. The analysis of this data showed a mean…

Astrophysics · Physics 2009-11-07 Taichi Kato , Gary Poyner , Timo Kinnunen

The SU UMa Nature of the Dwarf Nova, DM Lyrae

We carried out time-resolved $V$-band photometry of DM Lyr during long outbursts in 1996 July and in 1996 February-March at Ouda Station, Kyoto University and at Osaka Kyoiku University. Since superhumps were clearly detected in the light…

Astrophysics · Physics 2015-06-24 D. Nogami , H. Baba , K. Matsumoto , T. Kato

In-the-Gap SU UMa-Type Dwarf Nova, Var73 Dra with a Supercycle of about 60 Days

An intensive photometric-observation campaign of the recently discovered SU UMa-type dwarf nova, Var73 Dra was conducted from 2002 August to 2003 February. We caught three superoutbursts in 2002 October, December and 2003 February. The…

Astrophysics · Physics 2009-11-07 D. Nogami , M. Uemura , R. Ishioka , T. Kato , K. Torii , D. R. Starkey , K. Tanabe , T. Vanmunster , E. P. Pavlenko , V. P. Goranskij , E. A. Barsukova , O. Antoniuk , B. Martin , L. M. Cook , G. Masi , F. Mallia

Determination of the superoutburst cycle lengths of 206 SU UMa type dwarf novae

SU UMa stars are characterized by "superoutbursts" which are brighter at maximum light and which last much longer than the more frequent "ordinary" outbursts of these dwarf novae. Although there are now more than 1180 SU UMa type dwarf…

Solar and Stellar Astrophysics · Physics 2021-03-17 N. Vogt , E. C. Puebla , A. Contreras-Quijada

IX Draconis - a curious ER UMa-type dwarf nova

We report results of an extensive world-wide observing campaign devoted to a very active dwarf nova star - IX Draconis. We investigated photometric behaviour of the system to derive its basic outburst properties and understand peculiarities…

Solar and Stellar Astrophysics · Physics 2015-06-12 M. Otulakowska-Hypka , A. Olech , E. de Miguel , A. Rutkowski , R. Koff , K. Bakowska

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VIII: The Eighth Year (2015-2016)

Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we collected times of superhump maxima for 128 SU UMa-type dwarf novae observed mainly during the 2015-2016 season and characterized these objects. The data have…

Solar and Stellar Astrophysics · Physics 2016-07-20 Taichi Kato , Franz-Josef Hambsch , Berto Monard , Tonny Vanmunster , Yutaka Maeda , Ian Miller , Hiroshi Itoh , Seiichiro Kiyota , Keisuke Isogai , Mariko Kimura , Akira Imada , Tamas Tordai , Hidehiko Akazawa , Kenji Tanabe , Noritoshi Otani , Minako Ogi , Kazuko Ando , Naoki Takigawa , Pavol A. Dubovsky , Igor Kudzej , Sergey Yu. Shugarov , Natalia Katysheva , Polina Golysheva , Natalia Gladilina , Drahomir Chochol , Peter Starr , Kiyoshi Kasai , Roger D. Pickard , Enrique de Miguel , Naoto Kojiguchi , Yuki Sugiura , Daiki Fukushima , Eiji Yamada , Yusuke Uto , Taku Kamibetsunawa , Taiki Tatsumi , Nao Takeda , Katsura Matsumoto , Lewis M. Cook , Elena P. Pavlenko , Julia V. Babina , Nikolaj V. Pit , Oksana I. Antonyuk , Kirill A. Antonyuk , Aleksei A. Sosnovskij , Aleksei V. Baklanov , Stella Kafka , William Stein , Irina B. Voloshina , Javier Ruiz , Richard Sabo , Shawn Dvorak , Geoff Stone , Maksim V. Andreev , Sergey V. Antipin , Alexandra M. Zubareva , Anna M. Zaostrojnykh , Michael Richmond , Jeremy Shears , Franky Dubois , Ludwig Logie , Steve Rau , Siegfried Vanaverbeke , Andrei Simon , Arto Oksanen , William N. Goff , Greg Bolt , Bartomiej Debski , Christopher S. Kochanek , Benjamin Shappee , Krzysztof Z. Stanek , Jose L. Prieto , Rod Stubbings , Eddy Muyllaert , Mitsutaka Hiraga , Tsuneo Horie , Patrick Schmeer , Kenji Hirosawa

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)

Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we studied 86 SU UMa-type dwarf novae. We confirmed the general trends such as the relation between period derivatives and orbital periods. There are some systems…

Solar and Stellar Astrophysics · Physics 2015-06-11 Taichi Kato , Franz-Josef Hambsch , Hiroyuki Maehara , Gianluca Masi , Ian Miller , Ryo Noguchi , Chihiro Akasaka , Tomoya Aoki , Hiroshi Kobayashi , Katsura Matsumoto , Shinichi Nakagawa , Takuma Nakazato , Takashi Nomoto , Kazuyuki Ogura , Rikako Ono , Keisuke Taniuchi , William Stein , Arne Henden , Enrique de Miguel , Seiichiro Kiyota , Pavol A. Dubovsky , Igor Kudzej , Kazuyoshi Imamura , Hidehiko Akazawa , Ryosuke Takagi , Yuya Wakabayashi , Minako Ogi , Kenji Tanabe , Joseph Ulowetz , Etienne Morelle , Roger D. Pickard , Tomohito Ohshima , Kiyoshi Kasai , Elena P. Pavlenko , Oksana I. Antonyuk , Aleksei V. Baklanov , Kirill Antonyuk , Denis Samsonov , Nikolaj Pit , Aleksei Sosnovskij , Colin Littlefield , Richard Sabo , Javier Ruiz , Thomas Krajci , Shawn Dvorak , Arto Oksanen , Kenji Hirosawa , William N. Goff , Berto Monard , Jeremy Shears , David Boyd , Irina B. Voloshina , Sergey Yu. Shugarov , Drahomir Chochol , Atsushi Miyashita , Jochen Pietz , Natalia Katysheva , Hiroshi Itoh , Greg Bolt , Maksim V. Andreev , Nikolai Parakhin , Viktor Malanushenko , Fabio Martinelli , Denis Denisenko , Chris Stockdale , Peter Starr , Mike Simonsen , Paul. J. Tristram , Akihiko Fukui , Tamas Tordai , Robert Fidrich , Kevin B. Paxson , Koh-ichi Itagaki , Youichirou Nakashima , Seiichi Yoshida , Hideo Nishimura , Timur V. Kryachko , Andrey V. Samokhvalov , Stanislav A. Korotkiy , Boris L. Satovski , Rod Stubbings , Gary Poyner , Eddy Muyllaert , Vladimir Gerke , Walter MacDonald , Michael Linnolt , Yutaka Maeda , Hubert Hautecler

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)

Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during the 2010-2011 season. Although most of the new data for…

Solar and Stellar Astrophysics · Physics 2015-05-30 Taichi Kato , Hiroyuki Maehara , Ian Miller , Tomohito Ohshima , Enrique de Miguel , Kenji Tanabe , Kazuyoshi Imamura , Hidehiko Akazawa , Nanae Kunitomi , Ryosuke Takagi , Mikiha Nose , Franz-Josef Hambsch , Seiichiro Kiyota , Elena P. Pavlenko , Aleksei V. Baklanov , Oksana I. Antonyuk , Denis Samsonov , Aleksei Sosnovskij , Kirill Antonyuk , Maksim V. Andreev , Etienne Morelle , Pavol A. Dubovsky , Igor Kudzej , Arto Oksanen , Gianluca Masi , Thomas Krajci , Roger D. Pickard , Richard Sabo , Hiroshi Itoh , William Stein , Shawn Dvorak , Arne Henden , Shinichi Nakagawa , Ryo Noguchi , Eriko Iino , Katsura Matsumoto , Hiroki Nishitani , Tomoya Aoki , Hiroshi Kobayashi , Chihiro Akasaka , Greg Bolt , Jeremy Shears , Javier Ruiz , Sergey Yu. Shugarov , Drahomir Chochol , Nikolai A. Parakhin , Berto Monard , Kazuhiko Shiokawa , Kiyoshi Kasai , Bart Staels , Atsushi Miyashita , Donn R. Starkey , Yenal Ogmen , Colin Littlefield , Natalia Katysheva , Ivan M. Sergey , Denis Denisenko , Tamas Tordai , Robert Fidrich , Vitaly P. Goranskij , Jani Virtanen , Tim Crawford , Jochen Pietz , Robert A. Koff , David Boyd , Steve Brady , Nick James , William N. Goff , Koh-ichi Itagaki , Hideo Nishimura , Youichirou Nakashima , Seiichi Yoshida , Rod Stubbings , Gary Poyner , Yutaka Maeda , Stanislav A. Korotkiy , Kirill V. Sokolovsky , Seiji Ueda

Superhumps in active dwarf novae. Part I: ER Ursae Majoris

We report photometry results of a frequently outbursting dwarf nova, ER Ursae Majoris. To measure the outburst parameters of the system, we carried out analyses of the light curve, periodograms, and O-C diagrams. We investigated the…

Solar and Stellar Astrophysics · Physics 2026-01-26 K. Bakowska , B. Kirpluk , P. Zielinski , M. Motylinski , A. Gurgul , J. Golonka , K. Szyszka

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. X: The Tenth Year (2017)

Continuing the project described by Kato et al. (2009, PASJ, 61, S395, arXiv/0905.1757), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2017 season and characterized these objects. WZ…

Solar and Stellar Astrophysics · Physics 2020-02-19 Taichi Kato , Keisuke Isogai , Yasuyuki Wakamatsu , Franz-Josef Hambsch , Hiroshi Itoh , Tamas Tordai , Tonny Vanmunster , Pavol A. Dubovsky , Igor Kudzej , Tomas Medulka , Mariko Kimura , Ryuhei Ohnishi , Berto Monard , Elena P. Pavlenko , Kirill A. Antonyuk , Nikolaj V. Pit , Oksana I. Antonyuk , Julia V. Babina , Aleksei V. Baklanov , Aleksei A. Sosnovskij , Roger D. Pickard , Ian Miller , Yutaka Maeda , Enrique de Miguel , Stephen M. Brincat , Domenico Licchelli , Lewis M. Cook , Sergey Yu. Shugarov , Anna M. Zaostrojnykh , Drahomir Chochol , Polina Golysheva , Natalia Katysheva , Alexandra M. Zubareva , Geoff Stone , Kiyoshi Kasai , Peter Starr , Colin Littlefield , Seiichiro Kiyota , Maksim V. Andreev , Alexandr V. Sergeev , Javier Ruiz , Gordon Myers , Andrii O. Simon , Volodymyr V. Vasylenko , Francisco Soldan , Yenal Ogmen , Kazuhiro Nakajima , Peter Nelson , Gianluca Masi , Kenneth Menzies , Richard Sabo , Greg Bolt , Shawn Dvorak , Krzysztof Z. Stanek , Joseph V. Shields , Christopher S. Kochanek , Thomas W. -S. Holoien , Benjamin Shappee , Jose L. Prieto , Tadashi Kojima , Hideo Nishimura , Shizuo Kaneko , Shigehisa Fujikawa , Rod Stubbings , Eddy Muyllaert , Gary Poyner , Masayuki Moriyama , Hiroyuki Maehara , Patrick Schmeer , Denis Denisenko

Photometric study of new southern SU UMa-type dwarf novae and candidates: V877 Ara, KK Tel and PU CMa

We photometrically observed three dwarf novae V877 Ara, KK Tel and PU CMa. We discovered undisputed presence of superhumps in V877 Ara and KK Tel, with mean periods of 0.08411(2) d and 0.08808(3) d, respectively. Both V877 Ara and KK Tel…

Astrophysics · Physics 2009-11-07 T. Kato , R. Santallo , G. Bolt , T. Richards , P. Nelson , B. Monard , M. Uemura , S. Kiyota , R. Stubbings , A. Pearce , T. Watanabe , P. Schmeer , H. Yamaoka

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VII: The Seventh Year (2014-2015)

Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2014-2015 season and characterized these objects. Our project has…

Solar and Stellar Astrophysics · Physics 2015-10-21 Taichi Kato , Franz-Josef Hambsch , Pavol A. Dubovsky , Igor Kudzej , Berto Monard , Ian Miller , Hiroshi Itoh , Seiichiro Kiyota , Kazunari Masumoto , Daiki Fukushima , Hiroki Kinoshita , Kazuki Maeda , Jyunya Mikami , Risa Matsuda , Naoto Kojiguchi , Miho Kawabata , Megumi Takenaka , Katsura Matsumoto , Enrique de Miguel , Yutaka Maeda , Tomohito Ohshima , Keisuke Isogai , Roger D. Pickard , Arne Henden , Stella Kafka , Hidehiko Akazawa , Noritoshi Otani , Sakiko Ishibashi , Minako Ogi , Kenji Tanabe , Kazuyoshi Imamura , William Stein , Kiyoshi Kasai , Tonny Vanmunster , Peter Starr , Elena P. Pavlenko , Oksana I. Antonyuk , Kirill A. Antonyuk , Aleksei A. Sosnovskij , Nikolaj V. Pit , Julia V. Babina , Aleksandr Sklyanov , Rudolf Novak , Arto Oksanen , Shawn Dvorak , Raul Michel , Gianluca Masi , Colin Littlefield , Joseph Ulowetz , Sergey Yu. Shugarov , Polina Yu. Golysheva , Drahomir Chochol , Viktoriia Krushevska , Javier Ruiz , Tamas Tordai , Etienne Morelle , Richard Sabo , Hiroyuki Maehara , Michael Richmond , Natalia Katysheva , Kenji Hirosawa , William N. Goff , Franky Dubois , Ludwig Logie , Steve Rau , Irina B. Voloshina , Maksim V. Andreev , Kazuhiko Shiokawa , Vitaly V. Neustroev , George Sjoberg , Sergey Zharikov , Nick James , Greg Bolt , Tim Crawford , Denis Buczynski , Lewis M. Cook , Christopher S. Kochanek , Benjamin Shappee , Krzysztof Z. Stanek , Jose L. Prieto , Denis Denisenko , Hideo Nishimura , Masaru Mukai , Shizuo Kaneko , Seiji Ueda , Rod Stubbings , Masayuki Moriyama , Patrick Schmeer , Eddy Muyllaert , Jeremy Shears , Robert J. Modic , Kevin B. Paxson

Superhumps in a Peculiar SU UMa-Type Dwarf Nova ER Ursae Majoris

We report the photometry of a peculiar SU UMa-type dwarf nova - ER UMa for ten nights during 1998 December and 1999 March covering a complete rise to the supermaximum and a normal outburst cycle. Superhumps have been found during the rise…

Astrophysics · Physics 2009-10-31 Weihong Gao , Zongyun Li , Xiaoan Wu , Zhousheng Zhang , Yulan Li

MASTER OT J172758.09+380021.5: a peculiar ER UMa-type dwarf nova, probably a missed nova in the recent past

A CCD photometry of the dwarf nova MASTER OT J172758.09 +380021.5 was carried out in 2019 during 134 nights. Observations covered three superoutbursts, five normal outbursts and quiescence between them. The available ASASSN and ZTF data for…

Solar and Stellar Astrophysics · Physics 2021-06-09 E. Pavlenko , T. Kato , K. Antonyuk , N. Pit , L. Keir , S. Udovichenko , P. Dubovsk'y , A. Sosnovskij , O. Antonyuk , V. Shimansky , M. Gabdeev , F. Rakhmatullaeva , G. Kokhirova , S. Belan , A. Simon , A. Baklanov , N. Kojiguchi , V. Godunova

Superhumps Behavior during Normal Outbursts in ER UMa: Spectroscopy and Photometry

We have taken a 4-day spectroscopic observation and have been conducting a 13-day photometric study of the SU UMa-type dwarf nova, ER Ursae Majoris. The mean $K$-amplitude for the emission lines is $54\pm 8$ km s$^{-1}$ and $\gamma$…

Astrophysics · Physics 2015-06-24 Yinghe Zhao , Zongyun Li , Xiaoan Wu , Qiuhe Peng , Zhousheng Zhang , Zili Li , ;