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OT J002656.6 + 284933 (CSS101212:002657 + 284933): SU UMa-Type Dwarf Nova with Longest Superhump Periodстатья
- Авторы: KATO T., TORDAI T., LITTLEFIELD C., KASAI K., SHUGAROV S.Yu, KATYSHEVA N.
- Сборник: http://arxiv.org/abs/1703.00650v1 astro-ph
- Серия: http://arxiv.org/
- Год издания: 2017
- 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 in 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 passed a different evolutionary track from the standard one. Key words: accretion, accretion disks — stars: novae, cataclysmic variables — stars: dwarf novae — stars: individual (OT J002656.6+284933)
- Добавил в систему: Катышева Наталья Андреевна