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- Title
OT J002656.6+284933 (CSS101212:002657+ 284933): an SUUMa-type dwarf nova with the longest superhump period.
- Authors
Taichi KATO; TORDAI, Tamás; LITTLEFIELD, Colin; Kiyoshi KASAI; SHUGAROV, Sergey Yu.; KATYSHEVA, Natalia; ZAOSTROJNYKH, Anna M.; PICKARD, Roger D.; DE MIGUEL, Enrique; ANTONYUK, Kirill; ANTONYUK, Oksana; PAVLENKO, Elena P.; PIT, Nikolai; Hiroshi ITOH; RUIZ, Javier; ISOGAI, Keisuke; Mariko KIMURA; Yasuyuki WAKAMATSU; VANMUNSTER, Tonny; STONE, Geoff
- Abstract
We observed the 2016 outburst of OT J002656.6+284933 (CSS101212:002657+284933) and found that it has the longest recorded [0.13225(1) d on average] superhumps among SUUMa-type dwarf novae. The object is the third known SUUMa-type dwarf nova above the period gap. The outburst, however, was unlike ordinary long-period SUUMa-type dwarf novae in that it showed two post-outburst rebrightenings. It showed superhump evolution similar to short-period SUUMa-type dwarf novae. We could constrain themass ratio to less than 0.15 (most likely between 0.10 and 0.15) by using superhump periods in the early and post-superoutburst stages. These results suggest the possibility that OT J002656.6+284933 has an anomalously undermassive secondary and it should have followed a different evolutionary track from the standard one.
- Subjects
DWARF novae; METEOR showers; GALAXIES
- Publication
Publications of the Astronomical Society of Japan, 2017, Vol 69, Issue 3, p1
- ISSN
0004-6264
- Publication type
Letter to the Editor
- DOI
10.1093/pasj/psx020