Survey of period variations of superhumps in SU UMa-type dwarf
novae. VII. The seventh year (2014-2015)

J 2015

Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015)

KATO, Taichi, Franz-Josef HAMBSCH, Pavol A. DUBOVSKY, Igor KUDZEJ, Berto MONARD et. al.

Basic information

Original name

Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015)

Authors

KATO, Taichi (392 Japan, guarantor), Franz-Josef HAMBSCH (276 Germany), Pavol A. DUBOVSKY (703 Slovakia), Igor KUDZEJ (703 Slovakia), Berto MONARD (710 South Africa), Ian MILLER (840 United States of America), Hiroshi ITOH (392 Japan), Seiichiro KIYOTA (392 Japan), Kazunari MASUMOTO (392 Japan), Daiki FUKUSHIMA (392 Japan), Hiroki KINOSHITA (392 Japan), Kazuki MAEDA (392 Japan), Jyunya MIKAMI (392 Japan), Risa MATSUDA (392 Japan), Naoto KOJIGUCHI (392 Japan), Miho KAWABATA (392 Japan), Megumi TAKENAKA (392 Japan), Katsura MATSUMOTO (392 Japan), Enrique DE MIGUEL (724 Spain), Yutaka MAEDA (392 Japan), Tomohito OHSHIMA (392 Japan), Keisuke ISOGAI (392 Japan), Roger D. PICKARD (826 United Kingdom of Great Britain and Northern Ireland), Arne HENDEN (840 United States of America), Stella KAFKA (840 United States of America), Hidehiko AKAZAWA (392 Japan), Noritoshi OTANI (392 Japan), Sakiko ISHIBASHI (392 Japan), Minako OGI (392 Japan), Kenji TANABE (392 Japan), Kazuyoshi IMAMURA (392 Japan), William STEIN (840 United States of America), Kiyoshi KASAI (392 Japan), Tonny VANMUNSTER (56 Belgium), Peter STARR (36 Australia), Arto OKSANEN (246 Finland), Elena P. PAVLENKO (643 Russian Federation), Oksana I. ANTONYUK (643 Russian Federation), Kirill A. ANTONYUK (643 Russian Federation), Aleksei A. SOSNOVSKIJ (643 Russian Federation), Nikolaj V. PIT (643 Russian Federation), Julia V. BABINA (643 Russian Federation), Aleksandr SKLYANOV (643 Russian Federation), Rudolf NOVÁK (203 Czech Republic, belonging to the institution), Shawn DVORAK (840 United States of America), Raul MICHEL (840 United States of America), Gábor ALMÁSI (380 Italy), Colin LITTLEFIELD (840 United States of America), Joseph ULOWETZ (840 United States of America), Sergey Yu. SHUGAROV (643 Russian Federation), Polina Yu. GOLYSHEVA (643 Russian Federation), Drahomir CHOCHOL (703 Slovakia), Viktoriia KRUSHEVSKA (804 Ukraine), Javier RUIZ (724 Spain), Tamas TORDAI (724 Spain), Etienne MORELLE (724 Spain), Richard SABO (724 Spain), Hiroyuki MAEHARA (392 Japan), Michael RICHMOND (840 United States of America), Natalia KATYSHEVA (643 Russian Federation), Kenji HIROSAWA (56 Belgium), William N. GOFF (56 Belgium), Franky DUBOIS (56 Belgium), Ludwig LOGIE (56 Belgium), Steve RAU (56 Belgium), Irina B. VOLOSHINA (643 Russian Federation), Maksim V. ANDREEV (804 Ukraine), Kazuhiko SHIOKAWA (392 Japan), Vitaly V. NEUSTROEV (246 Finland), George SJOBERG (840 United States of America), Sergey ZHARIKOV (484 Mexico), Nick JAMES (840 United States of America), Greg BOLT (840 United States of America), Tim CRAWFORD (840 United States of America), Denis BUCZYNSKI (826 United Kingdom of Great Britain and Northern Ireland), Lewis M. COOK (840 United States of America), Christopher S. KOCHANEK (840 United States of America), Benjamin SHAPPEE (840 United States of America), Krzysztof Z. STANEK (840 United States of America), Jose L. PRIETO (840 United States of America), Denis DENISENKO (643 Russian Federation), Hideo NISHIMURA (392 Japan), Masaru MUKAI (392 Japan), Shizuo KANEKO (392 Japan), Seiji UEDA (392 Japan), Rod STUBBINGS (36 Australia), Masayuki MORIYAMA (392 Japan), Patrick SCHMEER (276 Germany), Eddy MUYLLAERT (56 Belgium), Jeremy SHEARS (826 United Kingdom of Great Britain and Northern Ireland), Robert J. MODIC (826 United Kingdom of Great Britain and Northern Ireland) and Kevin B. PAXSON (826 United Kingdom of Great Britain and Northern Ireland)

Edition

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, OXFORD (ENGLAND), OXFORD UNIV PRESS, 2015, 0004-6264

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.961

RIV identification code

RIV/00216224:14310/15:00086725

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1093/pasj/psv072

UT WoS

000366859800005

Keywords in English

accretion; accretion disks; novae; cataclysmic variables; stars; dwarf novae

Abstract

V originále

Continuing the project described by Kato et al. (2009, PASJ, 61, S395), 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 greatly improved the statistics of the distribution of orbital periods, which is a good approximation of the distribution of cataclysmic variables at the terminal evolutionary stage, and has confirmed the presence of a periodminimum at a period of 0.053 d and a period spike just above this period. The number density monotonically decreased toward the longer period and there was no strong indication of a period gap. We detected possible negative superhumps in Z Cha. It is possible that normal outbursts are also suppressed by the presence of a disk tilt in this system. There was no indication of enhanced orbital humps just preceding the superoutburst, and this result favors the thermal-tidal disk instability as the origin of superoutbursts. We detected superhumps in three AM CVn-type dwarf novae. Our observations and recent other detections suggest that 8% of objects showing dwarf nova-type outbursts are AM CVn-type objects. AM CVn-type objects and EI Psc-type objects may be more abundant than previously recognized. OT J213806, a WZ Sge-type object, exhibited remarkably different features between the 2010 and 2014 superoutbursts. Although the 2014 superoutburst was much fainter, the plateau phase was shorter than the 2010 one, and the course of the rebrightening phase was similar. This object indicates that the O-C diagrams of superhumps can indeed be variable, at least in WZ Sge-type objects. Four deeply eclipsing SU UMa-type dwarf novae (ASASSN-13cx, ASASSN-14ag, ASASSN-15bu, and NSV 4618) were identified. We studied long-term trends in supercycles in MM Hya and CY UMa and found systematic variations of supercycles of similar to 20%.

Citovat

KATO, Taichi, 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, Arto OKSANEN, Elena P. PAVLENKO, Oksana I. ANTONYUK, Kirill A. ANTONYUK, Aleksei A. SOSNOVSKIJ, Nikolaj V. PIT, Julia V. BABINA, Aleksandr SKLYANOV, Rudolf NOVÁK, Shawn DVORAK, Raul MICHEL, Gábor ALMÁSI, 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 and Kevin B. PAXSON. Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015). PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN. OXFORD (ENGLAND): OXFORD UNIV PRESS, 2015, vol. 67, No 6, p. "nestránkováno", 110 pp. ISSN 0004-6264. Available from: https://dx.doi.org/10.1093/pasj/psv072.

@article{1336412,
   author = {Kato, Taichi and Hambsch, FranzandJosef and Dubovsky, Pavol A. and Kudzej, Igor and Monard, Berto and Miller, Ian and Itoh, Hiroshi and Kiyota, Seiichiro and Masumoto, Kazunari and Fukushima, Daiki and Kinoshita, Hiroki and Maeda, Kazuki and Mikami, Jyunya and Matsuda, Risa and Kojiguchi, Naoto and Kawabata, Miho and Takenaka, Megumi and Matsumoto, Katsura and de Miguel, Enrique and Maeda, Yutaka and Ohshima, Tomohito and Isogai, Keisuke and Pickard, Roger D. and Henden, Arne and Kafka, Stella and Akazawa, Hidehiko and Otani, Noritoshi and Ishibashi, Sakiko and Ogi, Minako and Tanabe, Kenji and Imamura, Kazuyoshi and Stein, William and Kasai, Kiyoshi and Vanmunster, Tonny and Starr, Peter and Oksanen, Arto and Pavlenko, Elena P. and Antonyuk, Oksana I. and Antonyuk, Kirill A. and Sosnovskij, Aleksei A. and Pit, Nikolaj V. and Babina, Julia V. and Sklyanov, Aleksandr and Novák, Rudolf and Dvorak, Shawn and Michel, Raul and Almási, Gábor and Littlefield, Colin and Ulowetz, Joseph and Shugarov, Sergey Yu. and Golysheva, Polina Yu. and Chochol, Drahomir and Krushevska, Viktoriia and Ruiz, Javier and Tordai, Tamas and Morelle, Etienne and Sabo, Richard and Maehara, Hiroyuki and Richmond, Michael and Katysheva, Natalia and Hirosawa, Kenji and Goff, William N. and Dubois, Franky and Logie, Ludwig and Rau, Steve and Voloshina, Irina B. and Andreev, Maksim V. and Shiokawa, Kazuhiko and Neustroev, Vitaly V. and Sjoberg, George and Zharikov, Sergey and James, Nick and Bolt, Greg and Crawford, Tim and Buczynski, Denis and Cook, Lewis M. and Kochanek, Christopher S. and Shappee, Benjamin and Stanek, Krzysztof Z. and Prieto, Jose L. and Denisenko, Denis and Nishimura, Hideo and Mukai, Masaru and Kaneko, Shizuo and Ueda, Seiji and Stubbings, Rod and Moriyama, Masayuki and Schmeer, Patrick and Muyllaert, Eddy and Shears, Jeremy and Modic, Robert J. and Paxson, Kevin B.},
   article_location = {OXFORD (ENGLAND)},
   article_number = {6},
   doi = {http://dx.doi.org/10.1093/pasj/psv072},
   keywords = {accretion; accretion disks; novae; cataclysmic variables; stars; dwarf novae},
   language = {eng},
   issn = {0004-6264},
   journal = {PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN},
   title = {Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015)},
   url = {http://arxiv.org/abs/1507.05610},
   volume = {67},
   year = {2015}
}

TY  - JOUR
ID  - 1336412
AU  - Kato, Taichi - Hambsch, Franz-Josef - Dubovsky, Pavol A. - Kudzej, Igor - Monard, Berto - Miller, Ian - Itoh, Hiroshi - Kiyota, Seiichiro - Masumoto, Kazunari - Fukushima, Daiki - Kinoshita, Hiroki - Maeda, Kazuki - Mikami, Jyunya - Matsuda, Risa - Kojiguchi, Naoto - Kawabata, Miho - Takenaka, Megumi - Matsumoto, Katsura - de Miguel, Enrique - Maeda, Yutaka - Ohshima, Tomohito - Isogai, Keisuke - Pickard, Roger D. - Henden, Arne - Kafka, Stella - Akazawa, Hidehiko - Otani, Noritoshi - Ishibashi, Sakiko - Ogi, Minako - Tanabe, Kenji - Imamura, Kazuyoshi - Stein, William - Kasai, Kiyoshi - Vanmunster, Tonny - Starr, Peter - Oksanen, Arto - Pavlenko, Elena P. - Antonyuk, Oksana I. - Antonyuk, Kirill A. - Sosnovskij, Aleksei A. - Pit, Nikolaj V. - Babina, Julia V. - Sklyanov, Aleksandr - Novák, Rudolf - Dvorak, Shawn - Michel, Raul - Almási, Gábor - Littlefield, Colin - Ulowetz, Joseph - Shugarov, Sergey Yu. - Golysheva, Polina Yu. - Chochol, Drahomir - Krushevska, Viktoriia - Ruiz, Javier - Tordai, Tamas - Morelle, Etienne - Sabo, Richard - Maehara, Hiroyuki - Richmond, Michael - Katysheva, Natalia - Hirosawa, Kenji - Goff, William N. - Dubois, Franky - Logie, Ludwig - Rau, Steve - Voloshina, Irina B. - Andreev, Maksim V. - Shiokawa, Kazuhiko - Neustroev, Vitaly V. - Sjoberg, George - Zharikov, Sergey - James, Nick - Bolt, Greg - Crawford, Tim - Buczynski, Denis - Cook, Lewis M. - Kochanek, Christopher S. - Shappee, Benjamin - Stanek, Krzysztof Z. - Prieto, Jose L. - Denisenko, Denis - Nishimura, Hideo - Mukai, Masaru - Kaneko, Shizuo - Ueda, Seiji - Stubbings, Rod - Moriyama, Masayuki - Schmeer, Patrick - Muyllaert, Eddy - Shears, Jeremy - Modic, Robert J. - Paxson, Kevin B.
PY  - 2015
TI  - Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015)
JF  - PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
VL  - 67
IS  - 6
SP  - "nestránkováno"
EP  - "nestránkováno"
PB  - OXFORD UNIV PRESS
SN  - 00046264
KW  - accretion
KW  - accretion disks
KW  - novae
KW  - cataclysmic variables
KW  - stars
KW  - dwarf novae
UR  - http://arxiv.org/abs/1507.05610
L2  - http://arxiv.org/abs/1507.05610
N2  - Continuing the project described by Kato et al. (2009, PASJ, 61, S395), 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 greatly improved the statistics of the distribution of orbital periods, which is a good approximation of the distribution of cataclysmic variables at the terminal evolutionary stage, and has confirmed the presence of a periodminimum at a period of 0.053 d and a period spike just above this period. The number density monotonically decreased toward the longer period and there was no strong indication of a period gap. We detected possible negative superhumps in Z Cha. It is possible that normal outbursts are also suppressed by the presence of a disk tilt in this system. There was no indication of enhanced orbital humps just preceding the superoutburst, and this result favors the thermal-tidal disk instability as the origin of superoutbursts. We detected superhumps in three AM CVn-type dwarf novae. Our observations and recent other detections suggest that 8% of objects showing dwarf nova-type outbursts are AM CVn-type objects. AM CVn-type objects and EI Psc-type objects may be more abundant than previously recognized. OT J213806, a WZ Sge-type object, exhibited remarkably different features between the 2010 and 2014 superoutbursts. Although the 2014 superoutburst was much fainter, the plateau phase was shorter than the 2010 one, and the course of the rebrightening phase was similar. This object indicates that the O-C diagrams of superhumps can indeed be variable, at least in WZ Sge-type objects. Four deeply eclipsing SU UMa-type dwarf novae (ASASSN-13cx, ASASSN-14ag, ASASSN-15bu, and NSV 4618) were identified. We studied long-term trends in supercycles in MM Hya and CY UMa and found systematic variations of supercycles of similar to 20%.
ER  -

KATO, Taichi, 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, Arto OKSANEN, Elena P. PAVLENKO, Oksana I. ANTONYUK, Kirill A. ANTONYUK, Aleksei A. SOSNOVSKIJ, Nikolaj V. PIT, Julia V. BABINA, Aleksandr SKLYANOV, Rudolf NOVÁK, Shawn DVORAK, Raul MICHEL, Gábor ALMÁSI, 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 and Kevin B. PAXSON. Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014-2015). \textit{PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN}. OXFORD (ENGLAND): OXFORD UNIV PRESS, 2015, vol.~67, No~6, p.~''nestránkováno'', 110 pp. ISSN~0004-6264. Available from: https://dx.doi.org/10.1093/pasj/psv072.

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