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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >PM J03338+3320: Long-period superhumps in growing phase following a separate precursor outburst
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PM J03338+3320: Long-period superhumps in growing phase following a separate precursor outburst

机译：PM J03338 + 3320：单独的前体爆发后，处于生长期的长期超峰

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摘要

We observed the first-ever recorded outburst of PM J03338+3320, the cataclysmic variable selected by proper-motion survey. The outburst was composed of a precursor and the main superoutburst. The precursor outburst occurred at least 5 d before the maximum of the main superoutburst. Despite this separation, long-period superhumps were continuously seen between the precursor and main superoutburst. The period of these superhumps is longer than its orbital period by 6.0(1)% and can be interpreted to reflect the dynamical precession rate at the 3 : 1 resonance for a mass ratio of 0.172(4). These superhumps smoothly evolved into those in the main superoutburst. These observations provide the clearest evidence that the 3 : 1 resonance is triggered by the precursor outburst, even if it is well separated, and the resonance eventually causes the main superoutburst as predicted by the thermaltidal instability model. The presence of superhumps well before the superoutburst cannot be explained by alternative models (the enhanced mass-transfer model and the pure thermal instability one) and the present observations clearly support the thermaltidal instability model.
机译：我们观察到有史以来首次记录的PM J03338 + 3320爆发，这是通过适当运动调查选择的灾变变量。爆发由前兆和主要的超级爆发组成。前兆爆发发生在主超爆发最大值之前至少5天。尽管存在这种分离，在前驱体和主超爆发之间连续观察到了长时期的超级隆起。这些超级驼峰的周期比其轨道周期长6.0（1）％，并且可以解释为以质量比0.172（4）反映3：1共振时的动态进动率。这些超级驼峰顺利演变为主要超级爆发中的超级驼峰。这些观察结果提供了最清晰的证据，即3：1共振是由前驱体爆发触发的，即使它被很好地分开，并且该共振最终导致了热潮汐不稳定模型预测的主要超爆发。在超爆发之前就已经存在超驼峰，无法用其他模型（增强的传质模型和纯粹的热不稳定性模型）来解释，目前的观察结果清楚地支持了潮汐不稳定性模型。

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