arXiv 1602.067022016-02-22astro-ph.SR

超爆发中的超峰及其演化

Superhumps and their Evolution during Superoutbursts

J. Smak

备注：: 9 pages, 4 figures; submitted to "Acta Astronomica"
发表信息：: Acta Astronomica, 66, 75-83, 2016

摘要：

通过将光变曲线分解为基模和前三个泛频分量，分析了超峰的光变曲线及其在超爆发过程中的演化。基模的振幅被发现在超爆发过程中显着降低，而那些泛音几乎保持不变。在超爆发期间，基模{ \it}的最大值相位系统地增加，而泛音的最大值相位系统地{ \it}减少。这两种效应的结合导致了超峰光变曲线的特征演化：二次峰的出现和生长以及（O-C）图中的假相位跳跃。有两种解释是可能的。或者，不是只有一个超级驼峰周期$P_{sh}$，而是有四个周期$P_k$，它们类似于--但明显不同于--基本模式和$P_{sh}$的前三个泛音。或者--更有可能的是--那些与时间相关的相移是真实的。

英文摘要：

Light curves of superhumps and their evolution during superoutbursts are analyzed by decomposing them into their Fourier components, including the fundamental mode and the first three overtones. The amplitudes of the fundamental mode are found to decrease significantly during superoutburst while those of the overtones remain practically constant. The phases of maxima of the fundamental mode {\it increase} systematically during superoutburst while those of the overtones -- systematically {\it decrease}. The combination of the two effects is responsible for the characteristic evolution of superhump light curves: the appearance and growth of the secondary humps and the spurious phase jumps in the (O-C) diagrams. Two intrepretations are possible. Either that instead of just one superhump period $P_{sh}$ there are four periods $P_k$ which resemble -- but are significantly different from -- the fundamental mode and the first three overtones of $P_{sh}$. Or -- more likely -- that those time-dependent phase shifts are genuine.

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英文摘要：

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