CHARACTERISTICS OF TRANSVERSE WAVES IN CHROMOSPHERIC MOTTLES
CHARACTERISTICS OF TRANSVERSE WAVES IN CHROMOSPHERIC MOTTLES
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DOI：
10.1088/0004-637x/779/1/82
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
D. Kuridze;G. Verth;M. Mathioudakis;R. Erdélyi;D. Jess;Richard Morton;Damian J. Christian;F. Keenan
中科院分区：
文献类型：
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作者：
D. Kuridze;G. Verth;M. Mathioudakis;R. Erdélyi;D. Jess;Richard Morton;Damian J. Christian;F. Keenan
利用邓恩太阳望远镜上具有高时空分辨率的太阳大气快速振荡仪器所获取的数据，我们以前所未有的详细程度研究了太阳圆面中心附近色球精细结构中的横向振荡。这些振荡被解释为传播的和驻立的磁流体动力学扭结波。包括最大横向速度振幅和相速度在内的波的特性被作为沿结构长度方向距离的函数进行测量。将太阳磁震学应用于这些测量参数，以获取关于这些局域波导的关键等离子体参数（例如磁场、密度、温度、流速）的诊断信息。发现沿着约2兆米长度的光斑的磁场强度降低了12倍，而局域等离子体密度标高约为280±80千米。
Using data obtained by the high temporal and spatial resolution Rapid Oscillations in the Solar Atmosphere instrument on the Dunn Solar Telescope, we investigate at an unprecedented level of detail transverse oscillations in chromospheric fine structures near the solar disk center. The oscillations are interpreted in terms of propagating and standing magnetohydrodynamic kink waves. Wave characteristics including the maximum transverse velocity amplitude and the phase speed are measured as a function of distance along the structure's length. Solar magnetoseismology is applied to these measured parameters to obtain diagnostic information on key plasma parameters (e.g., magnetic field, density, temperature, flow speed) of these localized waveguides. The magnetic field strength of the mottle along the ∼2 Mm length is found to decrease by a factor of 12, while the local plasma density scale height is ∼280 ± 80 km.