arXiv 0812.00422008-12astro-ph

太阳和恒星振荡的磁指纹

Magnetic fingerprints of solar and stellar oscillations

Elena Khomenko

备注：: Proceeding of VIII Meeting of the Spanish Astronomical Society, Santander 7-11 July 2008
DOI：: 10.1007/978-3-642-11250-8_5

摘要：

波连接了太阳的所有层，从内部到高层大气。磁场对电磁波传播的重要作用已越来越清楚。磁场改变了波的传播速度，从而影响了日震学研究的结论。它可以改变波的传播方向，帮助引导它们直接到达日冕，扩展所有层之间的动态和磁耦合。现代仪器可以测量太阳活动区的复杂振荡模式和磁场的时间振荡等微小效应。太阳的各种磁结构中的振荡物理学类似于强磁场的恒星（如roAp星）的脉动。所有这些论点指向一个系统的自洽建模的磁结构中的波，是能够考虑到的磁场配置的复杂性的需要。在本文中，我们描述了这种模拟，总结了我们最近的研究结果，并汇集了理论和观测结果。

英文摘要：

Waves connect all the layers of the Sun, from its interior to the upper atmosphere. It is becoming clear now the important role of magnetic field on the wave propagation. Magnetic field modifies propagation speed of waves, thus affecting the conclusions of helioseismological studies. It can change the direction of the wave propagation, help channeling them straight up to the corona, extending the dynamic and magnetic couplings between all the layers. Modern instruments provide measurements of complex patterns of oscillations in solar active regions and of tiny effects such as temporal oscillations of the magnetic field. The physics of oscillations in a variety of magnetic structures of the Sun is similar to that of pulsations of stars that posses strong magnetic fields, such as roAp stars. All these arguments point toward a need of systematic self-consistent modeling of waves in magnetic structures that is able to take into account the complexity of the magnetic field configurations. In this paper, we describe simulations of this kind, summarize our recent findings and bring together results from the theory and observations.

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