De Moortel I
University of St Andrews School of Mathematics and Statistics North Haugh, St Andrews KY16 9SS, UK.
Philos Trans A Math Phys Eng Sci. 2005 Dec 15;363(1837):2743-60. doi: 10.1098/rsta.2005.1665.
The idea of exploiting observed oscillations as a diagnostic tool for determining the physical conditions of the coronal plasma was first suggested several decades ago (Roberts et al. 1984 Astrophys. J. 279, 857). Until recently, the application of this idea has been very limited by a lack of high-quality observations of coronal oscillations. However, during the last few years, this situation has changed dramatically, especially due to space-based observations by the Solar and Heliospheric Observatory and the Transition Region and Coronal Explorer and waves and oscillations have now been observed in a wide variety of solar structures, such as coronal loops, polar plumes and prominences. This paper will briefly summarize MHD wave theory, which forms the basis for coronal seismology, as well as present an overview of the variety of recently observed waves and oscillations in the solar corona. The present state of coronal seismology will also be discussed. Currently, the uncertainty associated with the obtained parameters is still considerable and, hence, the results require a cautious interpretation. However, these examples do show that coronal seismology is rapidly being transformed from a theoretical possibility to a viable technique.
利用观测到的振荡作为确定日冕等离子体物理条件的诊断工具这一想法，早在几十年前就首次被提出（罗伯茨等人，1984年，《天体物理学杂志》279卷，857页）。直到最近，由于缺乏对日冕振荡的高质量观测，这一想法的应用一直非常有限。然而，在过去几年里，这种情况发生了巨大变化，特别是由于太阳和日球层天文台以及过渡区和日冕探测器的天基观测，现在已经在各种各样的太阳结构中观测到了波和振荡，如日冕环、极羽和日珥。本文将简要总结构成日冕地震学基础的磁流体动力学波理论，并概述最近在日冕中观测到的各种波和振荡。还将讨论日冕地震学的现状。目前，与所获得参数相关的不确定性仍然相当大，因此，结果需要谨慎解释。然而，这些例子确实表明，日冕地震学正在迅速从一种理论上的可能性转变为一种可行的技术。
