ASASSN-15jd: WZ Sge-type star with intermediate superoutburst between single and double ones

ASASSN-15jd: WZ Sge-type star with intermediate superoutburst between single and double ones

We present optical photometry of a WZ Sge-type dwarf nova (DN), ASASSN-15jd. Its light curve showed a small dip in the middle of the superoutburst in 2015 for the first time among WZ Sge-type DNe. The unusual light curve implies a delay in the growth of the 3 : 1 resonance tidal instability. Also, t...

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Veröffentlicht in:Publications of the Astronomical Society of Japan 2016-08, Vol.68 (4)
Hauptverfasser: Kimura, Mariko, Isogai, Keisuke, Kato, Taichi, Imada, Akira, Kojiguchi, Naoto, Sugiura, Yuki, Fukushima, Daiki, Takeda, Nao, Matsumoto, Katsura, Dvorak, Shawn, Vanmunster, Tonny, Dubovsky, Pavol A., Kudzej, Igor, Miller, Ian, Pavlenko, Elena P., Babina, Julia V., Antonyuk, Oksana I., Baklanov, Aleksei V., Stein, William L., Andreev, Maksim V., Tordai, Tamás, Itoh, Hiroshi, Pickard, Roger D., Nogami, Daisaku
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Sprache:eng
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Zusammenfassung:We present optical photometry of a WZ Sge-type dwarf nova (DN), ASASSN-15jd. Its light curve showed a small dip in the middle of the superoutburst in 2015 for the first time among WZ Sge-type DNe. The unusual light curve implies a delay in the growth of the 3 : 1 resonance tidal instability. Also, the light curve is similar to those of two other WZ Sge-type stars, SSS J122221.7−311523 and OT J184228.1+483742, which are believed to be the best candidates for period bouncers on the basis of their small values of the mass ratio (q ≡ M 2/M 1). Additionally, the small mean superhump amplitude (
ISSN:0004-6264
2053-051X
DOI:10.1093/pasj/psw054