Erratum: OT J002656.6+284933 (CSS101212:002657+284933): an SUUMa-type dwarf nova with the longest superhump period
Erratum: OT J002656.6+284933 (CSS101212:002657+284933): an SUUMa-type dwarf nova with the longest superhump period
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勘误：OT J002656.6 284933 (CSS101212:002657 284933)：具有最长超驼峰周期的 SUUMa 型矮新星
DOI：
10.1093/pasj/psx036
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发表时间：
2017
影响因子：
2.3
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Kato Taichi;Tordai Tam?s;Littlefield Colin;Kasai Kiyoshi;Shugarov Sergey Yu.;et al.
我们观测了2016年爆发的OT J002656.6+284933(CSS101212：002657+284933)，发现它是Su Uma型矮新星中有记录的最长的[0.13225(1) d Average]超峰。该天体是周期间隙上方的第三颗已知的Su Uma型矮新星。然而，这次爆发不同于普通的长周期Su Uma型矮新星，因为它显示了爆发后的两次重新亮化。它表现出类似于短周期Su Uma型矮新星的超峰演化。我们可以将质量比限制在0.15以下(最有可能在0.10到0.15之间)，方法是在超暴早期和超暴后阶段使用超峰时期。这些结果表明，OT J002656.6+284933可能有一个质量异常低的次级天体，它应该遵循与标准天体不同的演化轨迹。
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.