RZ Leonis Minoris bridging between ER Ursae Majoris-type dwarf nova and nova-like system

被引：14

作者：

Kato, Taichi ^{[1
]}

Ishioka, Ryoko ^{[2
]}

Isogai, Keisuke ^{[1
]}

Kimura, Mariko ^{[1
]}

Imada, Akira ^{[3
,4
]}

Miller, Ian ^{[5
]}

Masumoto, Kazunari ^{[6
]}

Nishino, Hirochika ^{[6
]}

Kojiguchi, Naoto ^{[6
]}

Kawabata, Miho ^{[6
]}

Sakai, Daisuke ^{[6
]}

Sugiura, Yuki ^{[6
]}

Furukawa, Hisami ^{[6
]}

Yamamura, Kenta ^{[6
]}

Kobayashi, Hiroshi ^{[6
]}

Matsumoto, Katsura ^{[6
]}

Wang, Shiang-Yu ^{[2
]}

Chou, Yi ^{[7
]}

Ngeow, Chow-Choong ^{[7
]}

Chen, Wen-Ping ^{[7
]}

Panwar, Neelam ^{[7
]}

Lin, Chi-Sheng ^{[7
]}

Hsiao, Hsiang-Yao ^{[7
]}

Guo, Jhen-Kuei ^{[7
]}

Lin, Chien-Cheng ^{[7
]}

Omarov, Chingis ^{[8
]}

Kusakin, Anatoly ^{[8
]}

Krugov, Maxim ^{[8
]}

Starkey, Donn R. ^{[9
]}

Pavlenko, Elena P. ^{[10
]}

Antonyuk, Kirill A. ^{[10
]}

Sosnjvskij, Aleksei A. ^{[10
]}

Antonyuk, Oksana I. ^{[10
]}

Pit, Nikolai V. ^{[10
]}

Baklanov, Alex V. ^{[10
]}

Babina, Julia V. ^{[10
]}

Itoh, Hiroshi ^{[11
]}

Padovan, Stefano ^{[12
]}

Akazawa, Hidehiko ^{[13
]}

Kafka, Stella ^{[12
]}

de Miguel, Enrique ^{[14
,15
]}

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

Kiyota, Seiichiro ^{[18
]}

Shugarov, Sergey Yu. ^{[19
,20
]}

Chochol, Drahomir ^{[20
]}

Krushevska, Viktoriia ^{[21
]}

Sekeras, Matej ^{[20
]}

Pikalova, Olga ^{[22
]}

Sabo, Richard ^{[23
]}

Dubovsky, Pavol A. ^{[24
]}

机构：

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

[2] Natl Taiwan Univ, Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan

[3] Kyoto Univ, Kwasan Observ, Yamashina Ku, 17 Ohmine Cho Kita Kazan, Kyoto, Kyoto 6078471, Japan

[4] Kyoto Univ, Hida Observ, Yamashina Ku, 17 Ohmine Cho Kita Kazan, Kyoto, Kyoto 6078471, Japan

[5] Furzehill House, Swansea SA2 7LE, W Glam, Wales

[6] Osaka Kyoiku Univ, 4-698-1 Asahigaoka, Osaka 5828582, Japan

[7] Natl Cent Univ, Grad Inst Astron, Jhongli 32001, Taiwan

[8] Fessenkov Astrophys Inst, Observ 23, Alma Ata 050020, Kazakhstan

[9] DeKalb Observ, H63,2507 Cty Rd 60, Auburn, IN 46706 USA

[10] RAS, Crimean Astrophys Observ, Fed State Budget Sci Inst, Nauchnyi 298409, Republic Of Cri, Ukraine

[11] VSOLJ, 1001-105 Nishiterakata, Hachioji, Tokyo 1920153, Japan

[12] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 USA

[13] Okayama Univ Sci, Fac Informat, Dept Biosphere Geosphere Syst Sci, 1-1 Ridai Cho, Okayama, Okayama 7000005, Japan

[14] Univ Huelva, Fac Ciencias Expt, Dept Ciencias Integradas, Huelva 21071, Spain

[15] Observ CIECEM, Ctr Backyard Astrophys, Parque Dunar, Almonte 21760, Huelva, Spain

[16] British Astron Assoc, Variable Star Sect, Burlington House, London W1J 0DU, England

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

[18] VSOLJ, 7-1 Kitahatsutomi, Chiba 2730126, Japan

[19] Lomonosov Moscow State Univ, Sternberg Astron Inst, Univ Sky Ave 13, Moscow 119992, Russia

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

[21] Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho Ave, UA-03680 Kiev, Ukraine

[22] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[23] 2336 Trailcrest Dr, Bozeman, MT 59718 USA

[24] Vihorlat Observ, Mierova 4, Humenne 06601, Slovakia

[25] Northbrook Meadow Observ, Ctr Backyard Astrophys Illinois, 855 Fair Ln, Northbrook, IL 60062 USA

[26] Rolling Hills Observ, 1643 Nightfall Dr, Clermont, FL 34711 USA

[27] Hungarian Astron Assoc, Polaris Observ, Laborc Utca 2-C, H-1037 Budapest, Hungary

[28] Publ Observ Astrolab Iris, Verbrandemolenstr 5, B-8901 Zillebeke, Belgium

[29] Ctr Backyard Astrophys Belgium, Walhostr 1A, B-3401 Landen, Belgium

[30] Hankasalmi Observ, Vertaalantie 116, FIN-40500 Hankasalmi, Finland

[31] Kaminishiyamamachi 12-14, Nagasaki, Nagasaki 8500006, Japan

[32] Baselstr 133D, CH-4132 Muttenz, Switzerland

[33] 9 Rue Vasco GAMA, F-59553 Lauwin Planque, France

[34] Univ Turku, Finnish Ctr Astron ESO FINCA, Vaisalantie 20, FIN-21500 Piikkio, Finland

[35] Univ Oulu, Astron Res Unit, POB 3000, FIN-90014 Oulu, Finland

[36] George Elma Observ, 9 Contentment Crest,182, Mayhill, NM 88339 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2016年 / 68卷 / 06期

关键词：

accretion; accretion disks-novae; cataclysmic variables-stars: dwarf novae-stars: individual (RZ Leonis Minoris); SU-UMA STARS; CATACLYSMIC VARIABLE CANDIDATES; KEPLER LIGHT-CURVE; PERIOD VARIATIONS; ACCRETION DISKS; V1504; CYGNI; SUPERHUMPS; SUPEROUTBURST; MODEL; SUPERCYCLES;

D O I：

10.1093/pasj/psw101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We observed RZ LMi, which is renowned for its extremely short (similar to 19 d) supercycle and is a member of a small, unusual class of cataclysmic variables called ERUMa-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 novalike 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 SUUMa-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.

引用

页数：14

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