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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >NY Serpentis: SU UMa-type nova in the period gap with diversity of normal outbursts
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NY Serpentis: SU UMa-type nova in the period gap with diversity of normal outbursts

机译：NY Serpentis：周期性间隙中SU UMa型新星与正常爆发的多样性

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摘要

We present a photometric study of NY Ser, an in-the-gap SU UMa-type nova, in 2002 and 2013. We determined the duration of its superoutburst and the mean period of its superhump are 18 d and 0.10458 d, respectively. We detected in 2013 that NY Ser showed two distinct states separated by a superoutburst. A state of rather infrequent normal outbursts lasted at least 44 d before the superoutburst, and a state of frequent outbursts started immediately after the superoutburst and lasted at least 34 d. Unlike a typical SU UMa star with a bimodal distribution of outburst duration, NY Ser displayed a diversity of normal outbursts. In the state of infrequent outbursts, we detected a wide similar to 12 d outburst accompanied by 0.098 d orbital modulation but without superhumps ever established in NY Ser. We classified this as a "wide normal outburst." The orbital period was dominant both in quiescence and during normal outbursts in this state. In the state of the most frequent normal outbursts, the 0.10465 d positive superhump period was dominant and coexisted with the orbital modulation. In 2002 we detected the normal outburst of "intermediate" 5-6 d duration that was also accompanied by orbital modulations.
机译：我们在2002年和2013年提出了缝隙状SU UMa型新星NY Ser的光度学研究。我们确定了其超爆发的持续时间和其超驼峰的平均周期分别为18 d和0.10458 d。我们在2013年检测到，NY Ser出现了两个不同的状态，并被一次超爆发分开。正常爆发的状态很少发生，至少在爆发前持续了44 d，而频繁爆发的状态在爆发后立即开始并持续了至少34 d。与典型的SU UMa恒星具有爆发持续时间的双峰分布不同，NY Ser显示出正常爆发的多样性。在不频繁爆发的状态下，我们检测到与12 d爆发相似的宽范围，并伴有0.098 d轨道调制，但没有在NY Ser中建立超峰。我们将其归类为“广泛正常爆发”。在此状态下，静止期和正常爆发期间轨道周期都是主导的。在最频繁的正常爆发状态下，0.10465 d正超驼峰期占主导地位，并与轨道调制共存。在2002年，我们检测到“中间”持续5-6天的正常爆发，并伴有轨道调制。

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