Sensitivity of p-mode absorption on magnetic region properties and kernel functions
Sensitivity of p-mode absorption on magnetic region properties and kernel functions
复制标题
p 模式吸收对磁区特性和核函数的敏感性
DOI：
10.1051/0004-6361/201015898
复制
发表时间：
2011
影响因子：
6.5
通讯作者：
Gascoyne A
中科院分区：
文献类型：
--
作者：
Gascoyne A
目的利用p模激励在磁通管中激发磁流体动力学（MHD）香肠管波。这些管波携带能量远离p模腔，这导致吸收源。我们希望看到一个合奏的随机分布的薄的磁通量管的p-模式的模型谱区的吸收的效果，并研究的空间加权函数的效果理论上计算的吸收coefficients.MethodsWe计算的p模式的吸收系数的模型谱区，假设由一个合奏的许多薄的磁通量管与随机分布的等离子体属性。在合奏中的每个磁通管建模为轴对称的，非相互作用的，垂直取向和untwisted.ResultsWe发现的大小和形式的吸收系数是敏感的等离子体β的管，这是与以前的工作。用于模拟通量管集合的随机分布和吸收测量所固有的空间加权函数都影响吸收。随着加权函数的宽度增加，吸收增加。
AimsMagnetohydrodynamic (MHD) sausage tube waves are excited in magnetic flux tubes by p-mode forcing. These tube waves carry energy away from the p-mode cavity which results in a source of absorption. We wish to see the effect of an ensemble of randomly distributed thin magnetic flux tubes on the absorption of p-modes for the model plage region and also study the effect of the spacial weighting function on the theoretically calculated absorption coefficients.MethodsWe calculate the absorption coefficients of p modes for a model plage, assumed to consist of an ensemble of many thin magnetic flux tubes with randomly distributed plasma properties. Each magnetic flux tube in the ensemble is modelled as axisymmetric, non-interacting, vertically oriented and untwisted.ResultsWe find that the magnitude and the form of the absorption coefficient is sensitive to the plasma-βof the tubes which is consistent with previous work. Both the random distribution used to model the ensemble of flux tubes and the spatial weighting function inherent to the measurement of the absorption affect the absorption. As the width of the weighting function increases, the absorption increases.