论文标题
从2010.1到2022.4次喷发的复发性新烧焦；错过的2016.78 +-0.10的喷发和关键的复杂时期发生了变化
The Recurrent Nova U Scorpii from the 2010.1 to 2022.4 Eruptions; the Missed Eruption of 2016.78 +- 0.10 and the Critical Complex Period Changes
论文作者
论文摘要
U SCO是一个经常出现的Nova，观察到了11次爆发，最近一次是在2010.1和2022.4。我报告了我的计划（自1989年以来运行），从2010年到2022年测量了静止的Eclipse时间和亮度。轨道时期突然增加了+22.4 +-1.0份的轨道时期。这一时期的变化大于1999.2爆发的接近零周期变化（+3.9 +-6.1份）。这个时期的变化不能来自任何常规机制，而剩下的可能性是，周期变化是由鲜为人知的弹出不对称壳的鲜为人知的机制所占据的。从2010.1到2016.78，O-C曲线显示出稳定的周期变化，p-DOT等于（-21.0 +-3.2）x 10^-9。这大大高于前两个前爆发间隔的稳定周期变化（-3.2 +-1.9和-1.1 +-1.1 x 10^-9）。这种大，可变和负P点显然来自伴侣恒星旋转的磁制动。从2016.9 +-0.6开始，O-C曲线显示出强烈的扭结，这是Nova事件中突然时期变化（+35.4 +-7.1份）的独特特征。 2010.4之后静止的亮度表明，白矮人在2017.1 +-0.6年的下一个Nova事件中积聚了触发质量。光度记录显示，在2016年太阳能内部的75天间隔内，峰值峰值的唯一可能的时间（因此，其总持续时间为60天是无法检测到的），从而将错过的喷发限制为2016.78 +-0.10。
U Sco is a recurrent nova with eleven observed eruptions, most recently in 2010.1 and 2022.4. I report on my program (running since 1989) of measuring eclipse times and brightnesses of U Sco in quiescence, from 2010 to 2022. The orbital period suddenly increased by +22.4 +- 1.0 parts-per-million across the 2010.1 eruption. This period change is greater than the near-zero period change (+3.9 +- 6.1 parts-per-million) across the 1999.2 eruption. This period change cannot come from any of the usual mechanisms, whereas the one remaining possibility is that the period changes are dominated by the little-known mechanism of the nova ejecting asymmetric shells. From 2010.1 to 2016.78, the O-C curve showed a steady period change that was large, with P-dot equal (-21.0 +- 3.2)X 10^-9. This is greatly higher than the steady period changes in the two previous inter-eruption intervals (-3.2 +- 1.9 and -1.1 +- 1.1 X 10^-9). This large, variable, and negative P-dot apparently comes from magnetic braking of the companion star's rotation. Starting in 2016.9 +- 0.6, the O-C curve showed a strong kink that is a unique characteristic of the sudden period change (+35.4 +- 7.1 parts-per-million) across a nova event. The brightness in quiescence after 2010.4 shows that the white dwarf accreted the trigger mass for the next nova event in the year 2017.1 +- 0.6. Photometric records show the only possible time for the eruption to peak (such that its total duration of 60 days was undetectable by any observation) is during a 75 day interval inside the 2016 solar gap, thus constraining the missed eruption to 2016.78 +- 0.10.
