天鹅座V1316中的超峰和闪烁
Superhumps and flickering in V1316 Cygni
摘要：
我们提出了一个协调的CCD测光活动，观察2006年6月的超级爆发的激变变量V1316天鹅座涉及8个均匀分布的观察者的分析和结果。6月10日，爆发达到15.03等的峰值，以0.14等/天的速度下降，持续了11天，振幅高于平静期的2.4等。我们首次发现了共同的超级驼峰，从而确认V1316 Cyg是UGSU类矮新星的成员。我们观察到在爆发的三分之二处有一个过渡到后期超级峰，相关的相移为0.50 +/- 0.06个周期。在此转变之前的平均共同超峰期为0.07685 +/- 0.00003 d，而在此转变之后的平均后期超峰期为0.07654 +/- 0.00002 d。共同超峰周期以dP/dt = -5.1 +/- 1.7 x10^-5 /周期的速率下降。在后期超级峰的开始，功率从超级峰基频到其第一谐波并再次返回的瞬时转变。我们检测到的轨道周期为0.0740 +/- 0.0002 d，给出了分数超峰周期超过0.038 +/- 0.003和质量比为0.167 +/- 0.010。对V1316 Cyg的闪烁行为进行的标度图分析发现，在超级爆发期间，表征闪烁的alpha和sigma参数发生了显着变化。我们还发现，在超级爆发开始时和两次正常爆发期间，闪烁的水平相对较低。
英文摘要：
We present analysis and results of a coordinated CCD photometry campaign to observe the 2006 June superoutburst of the cataclysmic variable V1316 Cyg involving 8 longitudinally-distributed observers. The outburst peaked at magnitude 15.03 on June 10, declined at a rate of 0.14 mag/day, lasted 11 days and had an amplitude above quiescence of 2.4 magnitudes. We detected common superhumps for the first time, thereby confirming that V1316 Cyg is a member of the UGSU class of dwarf novae. We observed a transition to late superhumps two-thirds of the way through the outburst with an associated phase shift of 0.50 +/- 0.06 cycles. The mean common superhump period before this transition was 0.07685 +/- 0.00003 d and the mean late superhump period following the transition was 0.07654 +/- 0.00002 d. The common superhump period decreased at a rate dP/dt = -5.1 +/- 1.7 x10^-5 /cycle. At the onset of late superhumps, there was a transient shift in power from the superhump fundamental frequency to its first harmonic and back again. We detected an orbital period of 0.0740 +/- 0.0002 d giving a fractional superhump period excess of 0.038 +/- 0.003 and a mass ratio of 0.167 +/- 0.010. A scalegram analysis of the flickering behaviour of V1316 Cyg found that the alpha and sigma parameters characterising flickering changed significantly during the superoutburst. We also found flickering to be at a relatively much lower level at the beginning of the superoutburst and during two normal outbursts.
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