OT J002656.6+284933 (CSS101212:002657+284933): an SU UMa-type dwarf nova with the longest superhump period

Kato, T.; Tordai, T.; Littlefield, C.; Kasai, K.; Shugarov, S.Y.; Katysheva, N.; et al.

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 июля 2017 г.

Авторы: Kato T., Tordai T., Littlefield C., Kasai K., Shugarov S.Yu, Katysheva N., et al.
Журнал: Publications of the Astronomical Society of Japan
Том: 69
Номер: 3
Год издания: 2017
Издательство: Astronomical Society of Japan
Местоположение издательства: Japan
Первая страница: L4-1
Последняя страница: L4-6
DOI: 10.1093/pasj/psx020
Аннотация: 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 SU UMa-type dwarf novae. The object is the third known SU UMa-type dwarf nova above the period gap. The outburst, however, was unlike ordinary long-period SU UMa-type dwarf novae in that it showed two post-outburst rebrightenings. It showed superhump evolution similar to short-period SU UMa-type dwarf novae. We could constrain the mass 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.
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OT J002656.6+284933 (CSS101212:002657+284933): an SU UMa-type dwarf nova with the longest superhump periodстатья

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