解读SPB星KIC 7760680振荡谱中的周期间隔模式
Deciphering the period spacing pattern in the oscillation spectrum of the SPB star KIC 7760680
摘要：
本文介绍了开普勒测光中发现的旋转慢脉动B型星KIC 7760680的分析结果。该恒星的振荡频谱呈现出一系列的36个频率，这些频率在周期上是准等间隔的。我们证实，这一系列可以与连续径向顺序的双偶极模式。在我们的研究中，旋转的影响被包括在MESA平衡模型以及在传统近似框架下的puslational计算中。我们发现，脉动模型计算的OPLIB不透明度最好的再现所观察到的频率范围。还测试了在$\log T=5.3$、5.46和5.06处增加不透明度的改良不透明度数据。在$\log T=5.3$处将OPLIB不透明度增加约50%足以激发KIC 7760680的36个频率峰值的整个范围内的模式。
英文摘要：
We present the analysis of KIC 7760680, the rotating Slowly Pulsating B-type star identified in the Kepler photometry. The oscillation spectrum of the star exhibits a series of 36 frequencies which are quasi-equally spaced in period. We confirm that this series can be associated with prograde dipole modes of consecutive radial orders. In our studies, the effects of rotation were included in the MESA equilibrium models as well as in the puslational calculations in the framework of the traditional approximation. We find that pulsational models computed with the OPLIB opacities best reproduce the observed frequency range. The modified opacity data with an enhancement of the opacity at $\log T=5.3$, 5.46 and 5.06 were tested as well. Increasing the OPLIB opacities by about 50% at $\log T=5.3$ is sufficient to excite modes in the whole range of 36 frequency peaks of KIC 7760680.
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