OBSERVATIONS OF SAUSAGE MODES IN MAGNETIC PORES
OBSERVATIONS OF SAUSAGE MODES IN MAGNETIC PORES
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DOI：
10.1088/2041-8205/729/2/l18
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Richard Morton;R. Erdélyi;D. Jess;M. Mathioudakis
中科院分区：
文献类型：
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作者：
Richard Morton;R. Erdélyi;D. Jess;M. Mathioudakis
我们在这里提出的证据，磁流体动力学（MHD）香肠模式的观测磁孔在太阳光球。波分析的经验分解方法被用来识别通过太阳大气快速振荡（ROSA）仪器观测到的4170毫微米“蓝色连续”滤波器检测到的振荡。孔尺寸和强度的异相、周期性行为被用作磁声香肠振荡存在的指标。磁声香肠模式的多个签名被发现在一些孔隙。周期范围从短至30 s到450 s。发现的许多磁声香肠模式振荡的周期为3分钟和5分钟，类似于太阳内部的声学全局模式。有人建议，这些全球振荡可能是驱动器的香肠型磁声MHD波模式的孔隙。
We present here evidence for the observation of the magnetohydrodynamic (MHD) sausage modes in magnetic pores in the solar photosphere. Further evidence for the omnipresent nature of acoustic global modes is also found. The empirical decomposition method of wave analysis is used to identify the oscillations detected through a 4170 Å “blue continuum” filter observed with the Rapid Oscillations in the Solar Atmosphere (ROSA) instrument. Out of phase, periodic behavior in pore size and intensity is used as an indicator of the presence of magnetoacoustic sausage oscillations. Multiple signatures of the magnetoacoustic sausage mode are found in a number of pores. The periods range from as short as 30 s up to 450 s. A number of the magnetoacoustic sausage mode oscillations found have periods of 3 and 5 minutes, similar to the acoustic global modes of the solar interior. It is proposed that these global oscillations could be the driver of the sausage-type magnetoacoustic MHD wave modes in pores.