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

被引：68

作者：

Kato, Taichi ^{[1
]}

Hambsch, Franz-Josef ^{[2
,3
,4
]}

Maehara, Hiroyuki ^{[5
,6
]}

Masi, Gianluca ^{[7
]}

Miller, Ian

Noguchi, Ryo ^{[8
]}

Akasaka, Chihiro ^{[8
]}

Aoki, Tomoya ^{[8
]}

Kobayashi, Hiroshi ^{[8
]}

Matsumoto, Katsura ^{[8
]}

Nakagawa, Shinichi ^{[8
]}

Nakazato, Takuma ^{[8
]}

Nomoto, Takashi ^{[8
]}

Ogura, Kazuyuki ^{[8
]}

Ono, Rikako ^{[8
]}

Taniuchi, Keisuke ^{[8
]}

Stein, William

Henden, Arne ^{[9
]}

de Miguel, Enrique ^{[10
,11
]}

Kiyota, Seiichiro ^{[12
]}

Dubovsky, Pavol A. ^{[13
]}

Kudzej, Igor ^{[13
]}

Imamura, Kazuyoshi ^{[14
]}

Akazawa, Hidehiko ^{[14
]}

Takagi, Ryosuke ^{[14
]}

Wakabayashi, Yuya ^{[14
]}

Ogi, Minako ^{[14
]}

Tanabe, Kenji ^{[14
]}

Ulowetz, Joseph ^{[15
]}

Morelle, Etienne

Pickard, Roger D. ^{[16
,17
]}

Ohshima, Tomohito ^{[1
]}

Kasai, Kiyoshi

Pavlenko, Elena P. ^{[18
]}

Antonyuk, Oksana I. ^{[18
]}

Baklanov, Aleksei V. ^{[18
]}

Antonyuk, Kirill ^{[18
]}

Samsonov, Denis ^{[18
]}

Pit, Nikolaj ^{[18
]}

Sosnovskij, Aleksei ^{[18
]}

Littlefield, Colin ^{[19
]}

Sabo, Richard

Ruiz, Javier ^{[20
,21
]}

Krajci, Thomas

Dvorak, Shawn ^{[22
]}

Oksanen, Arto ^{[23
]}

Hirosawa, Kenji

Goff, William N.

Monard, Berto ^{[24
]}

Shears, Jeremy ^{[25
]}

机构：

[1] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan

[2] GEOS, F-28300 Bailleau Leveque, France

[3] Bundesdeutsch Arbeitsgemeinschaft Veranderliche S, D-12169 Berlin, Germany

[4] VVS, B-2400 Mol, Belgium

[5] Kyoto Univ, Kwasan Observ, Yamashina Ku, Kyoto 6078471, Japan

[6] Kyoto Univ, Hida Observ, Yamashina Ku, Kyoto 6078471, Japan

[7] Virtual Telescope Project, I-03023 Ceccano, FR, Italy

[8] Osaka Kyoiku Univ, Osaka 5828582, Japan

[9] AAVSO, Cambridge, MA 02138 USA

[10] Univ Huelva, Dept Fis Aplicada, Fac Ciencias Expt, Huelva 21071, Spain

[11] Observ CIECEM, Ctr Backyard Astrophys, Almonte 21760, Huelva, Spain

[12] VSOLJ, Tsukuba, Ibaraki 3050035, Japan

[13] Vihorlat Observ, Humenne, Slovakia

[14] Okayama Univ Sci, Dept Biosphere Geosphere Syst Sci, Fac Informat, Okayama 7000005, Japan

[15] Northbrook Meadow Observ, Ctr Backyard Astrophys Illinois, Northbrook, IL 60062 USA

[16] BAA VSS, London W1J 0DU, England

[17] 3 Birches, Leominster HR6 9NG, Herts, England

[18] Crimean Astrophys Observ, UA-98409 Nauchnyi, Crimea, Ukraine

[19] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[20] Observ Cantabria, Valderredible, Cantabria, Spain

[21] Agrupac Astron Cantabra, Santander 39080, Spain

[22] Rolling Hills Observ, Clermont, FL 34711 USA

[23] Jyvaskylan Sirius Ry, Nyrola Observ, FI-40270 Palokka, Finland

[24] Ctr Backyard Astron Pretoria, Bronberg Observ, ZA-0056 Tiegerpoort, South Africa

[25] Pemberton, Tarporley CW6 9NR, Cheshire, England

[26] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119992, Russia

[27] Slovak Acad Sci, Astron Inst, Tatranska Lomnica 05960, Slovakia

[28] Seikei Meteorol Observ, Seikei High Sch, Musashino, Tokyo 1808633, Japan

[29] VSOLJ, Hachioji, Tokyo 1920153, Japan

[30] Russian Acad Sci, Inst Astron, Peak Terskol 361605, Kabardino Balka, Russia

[31] NASU, Int Ctr Astron Med & Ecol Res, UA-03680 Kiev, Ukraine

[32] New Mexico State Univ, Apache Point Observ, Sunspot, NM 88349 USA

[33] Russian Acad Sci, Space Res Inst IKI, Moscow, Russia

[34] Warrumbungle Observ, Coonabarabran, NSW 2357, Australia

[35] Mt John Observ, Lake Tekapo 8770, New Zealand

[36] Natl Inst Nat Sci, Natl Astron Observ Japan, Okayama Astrophys Observ, Asakuchi, Okayama 7190232, Japan

[37] Hungarian Astron Assoc, Polaris Observ, H-1037 Budapest, Hungary

[38] Itagaki Astron Observ, Yamagata 9902492, Japan

[39] Astrotel Caucasus Observ, Village Zelenchukskaya K 369140, Russia

[40] BAA Variable Star Sect, Birmingham B44 0QE, W Midlands, England

[41] VVS, B-3370 Boutersem, Belgium

[42] Winchester Observ, Winchester, ON K0C 2K0, Canada

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2013年 / 65卷 / 01期

关键词：

accretion; accretion disks; stars: dwarf novae; stars:; novae; cataclysmic variables; ER-URSAE-MAJORIS; VARIABLES EXPERIMENT CURVE; DIGITAL SKY SURVEY; PULSATING WHITE-DWARFS; DISK INSTABILITY MODEL; CATACLYSMIC VARIABLES; ORBITAL PERIODS; V485; CENTAURI; V344; LYRAE; NEGATIVE SUPERHUMPS;

D O I：

10.1093/pasj/65.1.23

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Continuing the project described by Kato et al. (2009, PASJ, 61, S395), we collected times of superhump maxima for 86 SU UMa-type dwarf novae, mainly observed during the 2011-2012 season. We confirmed general trends recorded in our previous studies, such as the relation between period derivatives and orbital periods. There are some systems showing positive period derivatives despite the long orbital period. We observed the 2011 outburst of the WZ Sge-type dwarf nova BW Scl, and recorded an O - C diagram similar to those of previously known WZ Sge-type dwarf novae. The WZ Sge-type dwarf nova OT J184228.1+483742 showed an unusual pattern of double outbursts composed of an outburst with early superhumps and one with ordinary superhumps. We propose an interpretation that a very small growth rate of the 3:1 resonance due to an extremely low mass-ratio led to quenching the superoutburst before the ordinary superhump appeared. We systematically studied ER UMa-type dwarf novae, and found that V1159 Ori showed positive superhumps similar to ER UMa in the 1990s. The recently recognized ER UMa-type object BK Lyn dominantly showed negative superhumps, and its behavior was very similar to the present-day state of ER UMa. The pattern of period variations in AM CVn-type objects was very similar to that of short-period hydrogen-rich SU UMa-type dwarf novae, making them a helium analogue of hydrogen-rich SU UMa-type dwarf novae. SBS 1108+574, a peculiar hydrogen-rich dwarf nova below the period minimum, showed a very similar pattern of period variations to those of short-period SU UMa-type dwarf novae. The mass-ratio derived from the detected orbital period suggests that this secondary is a somewhat evolved star whose hydrogen envelope was mostly stripped during the mass-exchange. CC Scl, MASTER OT J072948.66+593824.4, and OT J173516.9+154708 showed only low-amplitude superhumps with complex profiles. These superhumps are likely to be a combination of two closely separated periods.

引用

页数：76

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