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| 題名: | RZ Leonis Minoris bridging between ER Ursae Majoris-Type dwarf nova & nova-like system |
| 作者: | 饒兆聰;Kato, Taichi;Ishioka, Ryoko;Isogai, Keisuke;Kimura, Mariko;Imada, Akira;Miller, Ian;Masumoto, Kazunari;Nishino, Hirochika;Kojiguchi, Naoto;Kawabata, Miho;Sakai, Daisuke;Sugiura, Yuki;Furukawa, Hisami;Yamamura, Kenta;Kobayashi, Hiroshi;Matsumoto, Katsura;Wang, Shiang-Yu;Chou, Yi;Ngeow, Chow-Choong;Chen, Wen-Ping;Panwar, Neelam;Lin, Chi-Sheng;Hsiao, Hsiang-Yao;Guo, Jhen-Kuei;Lin, Chien-Cheng;Omarov, Chingis;Kusakin, Anatoly;Krugov, Maxim;Starkey, Donn R.;Pavlenko, Elena P.;Antonyuk, Kirill A.;Sosnjvskij, Aleksei A.;Antonyuk, Oksana I.;Pit, Nikolai V.;Baklanov, Alex V.;Babina, Julia V.;Itoh, Hiroshi;Padovan, Stefano;Akazawa, Hidehiko;Kafka, Stella;de Miguel, Enrique;Pickard, Roger D.;Kiyota, Seiichiro;Shugarov, Sergey Yu;Chochol, Drahomir;Krushevska, Viktoriia;Sekeráš, Matej;Pikalova, Olga;Sabo, Richard;Dubovsky, Pavol A.;Kudzej, Igor;Ulowetz, Joseph;Dvorak, Shawn;Stone, Geoff;Tordai, Tamás;Dubois, Franky;Logie, Ludwig;Rau, Steve;Vanaverbeke, Siegfried;Vanmunster, Tonny;Oksanen, Arto;Maeda, Yutaka;Kasai, Kiyoshi;Katysheva, Natalia;Morelle, Etienne;Neustroev, Vitaly V.;Sjoberg, George |
| 貢獻者: | 理學院天文研究所 |
| 日期: | 2016-10-01 |
| 上傳時間: | 2026-04-21 14:57:38 (UTC+8) |
| 出版者: | Oxford University Press |
| 摘要: | 摘要： We observed RZ LMi, which is renowned for its extremely short (∼19 d) supercycle and is a member of a small, unusual class of cataclysmic variables called ER UMa-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 nova-like 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 SU UMa-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.
出版日期： 2016-12-01
出處： Publications of the Astronomical Society of Japan, 2016-12
資源來源： Alma/SFX Local Collection
識別號： ISSN: 0004-6264
識別號： ISSN: 2053-051X
識別號： EISSN: 2053-051X
識別號： DOI: 10.1093/pasj/psw101 |
| 顯示於類別: | [天文研究所] 期刊論文
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