论文标题
深度子午循环的时间距离旋转学
Time-Distance Helioseismology of Deep Meridional Circulation
论文作者
论文摘要
太阳内部动力学的一个关键组成部分是子午循环（MC），其在表面层中的极向分量已经很好地观察到。然而，对MC的深层结构的时间距离的热震研究产生了矛盾的推论。在这里，在现有结果的摘要之后，我们展示了使用Helioseissic和Doppler Imager（HMI）Onboard Solar Dynamics（SDO）的数据，在测得的声波旅行时间中，如何通过分析CLS的频率依赖性来影响推理CLS的频率依赖性。我们的结果表明，旅行时间的残留系统学是对MC的深层结构的不同推论的主要原因。
A key component of solar interior dynamics is the meridional circulation (MC), whose poleward component in the surface layers has been well observed. Time-distance helioseismic studies of the deep structure of MC, however, have yielded conflicting inferences. Here, following a summary of existing results we show how a large center-to-limb systematics (CLS) in the measured travel times of acoustic waves affect the inferences through an analysis of frequency dependence of CLS, using data from the Helioseismic and Doppler Imager (HMI) onboard Solar Dynamics Observatory (SDO). Our results point to the residual systematics in travel times as a major cause of differing inferences on the deep structure of MC.
