论文标题
沿宽太阳磁通管传播的扭转alfv'en波的新截止频率
New Cutoff Frequency for Torsional Alfv'en Waves Propagating along Wide Solar Magnetic flux Tubes
论文作者
论文摘要
考虑了一个嵌入在太阳能球层中或下太阳电动机中的分离，等温和宽的磁通管，并研究了线性扭转alfv'en波的传播。结果表明，管的宽度会导致新的截止频率，这是一个局部数量，可在不同的大气高度下提供波浪传播条件。该截止物用于建立在太阳能球和较低太阳能电晕中传播和反射波的频率范围。将获得的结果与先前获得的薄磁通管获得的结果进行了比较，并讨论了差异。此外，还将结果与当前的一些观察数据进行了比较，并用于在不同大气高度下数据中存在传播波的存在；这对太阳大气中的波的能量和动量传递具有深远的影响，以及线性扭转ALFV'en波在大气加热和风加速度中的作用。
An isolated, isothermal, and wide magnetic flux tube embedded either in the solar chromosphere or in the lower solar corona is considered, and the propagation of linear torsional Alfv'en waves is investigated. It is shown that the wideness of the tube leads to a new cutoff frequency, which is a local quantity that gives the conditions for the wave propagation at different atmospheric heights. The cutoff is used to establish the ranges of frequencies for the propagating and reflected waves in the solar chromosphere and lower solar corona. The obtained results are compared to those previously obtained for thin magnetic flux tubes and the differences are discussed. Moreover, the results are also compared to some current observational data, and used to establish the presence of propagating waves in the data at different atmospheric heights; this has profound implications on the energy and momentum transfer by the waves in the solar atmosphere, and the role of linear torsional Alfv'en waves in the atmospheric heating and wind acceleration.
