Magnetohydrodynamic mode coupling in the quiet-sun network

被引:0
|
作者
Bloomfield, DS [1 ]
McAteer, RTJ [1 ]
Mathioudakis, M [1 ]
Williams, DR [1 ]
Keenan, FP [1 ]
机构
[1] Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland
来源
PROCEEDINGS OF THE 13TH CAMBRIDGE WORKSHOP ON COOL STARS, STELLAR SYSTEMS AND THE SUN - PROCEEDINGS, VOLS 1 AND 2 | 2005年 / 560卷
关键词
sun : oscillations; sun : chromosphere; sun : photosphere; sun : magnetic fields;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
High-cadence, multiwavelength optical observations, taken during two separate observing runs at the National Solar Observatory/Sacramento Peak, are presented here. A total of fifteen network bright points have been studied at differing atmospheric heights, using images taken in narrow wavebands. Wavelet analysis was used to study wavepackets, and identify traveling magnetohydrodynamic (MHD) waves. Wave speeds were estimated through temporal cross-correlation of signals, in selected frequency bands of wavelet power, in each wavelength. Seven mode-coupling cases were identified, one in each of seven of the NBPs. MHD mode coupling is a viable mechanism for transport of energy from the photosphere into the chromosphere, where subsequent deposition can contribute to atmospheric heating.
引用
收藏
页码:449 / 451
页数:3
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