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ASASSN-18aan: An eclipsing SU UMa-type cataclysmic variable with a 3.6-hr orbital period and a late G-type secondary star

Yasuyuki Wakamatsu,John R. Thorstensen,Naoto Kojiguchi,Keisuke Isogai,Mariko Kimura,Ryuhei Ohnishi,Taichi Kato,Hiroshi Itoh,Yuki Sugiura,Sho Sumiya,Hanami Matsumoto,Daiki Ito,Kengo Nikai,Hiroshi Akitaya,Chihiro Ishioka,Kohei Oide,Takahiro Kanai, Yoshinori Uzawa,Yumiko Oasa,Tamás Tordai,Tonny Vanmunster,Sergey Yu. Shugarov,Masayuki Yamanaka,Mahito Sasada,Kengo Takagi,Yuki Nishinaka,Yuina Yamazaki,Ikki Otsubo,Tatsuya Nakaoka,Katsuhiro L. Murata,Ryou Ohsawa,Masahiro Morita,Makoto Ichiki, Sjoerd Dufoer,Masanori Mizutani,Takashi Horiuchi,Miyako Tozuka,Masaki Takayama,Tomohito Ohshima,Tomoki Saito,Pavol A. Dubovsky,Geoff Stone,Ian Miller,Daisaku Nogami

Publications of the Astronomical Society of Japan（2021）

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摘要
We report photometric and spectroscopic observations of the eclipsing SU UMa-type dwarf nova ASASSN-18aan. We observed the 2018 superoutburst with 2.3 mag brightening and found the orbital period (Porb) to be 0.149454(3) d, or 3.59 hr. This is longward of the period gap, establishing ASASSN-18aan as one of a small number of long-Porb SU UMa-type dwarf novae. The estimated mas...
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关键词
accretion, accretion disks,novae, cataclysmic variables,stars: dwarf novae,stars: individual (ASASSN-18aan)
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