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Network Loop Oscillations with EIS/Hinode

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arxiv 0903.0212 v1 pith:SVH5HCDX submitted 2009-03-02 astro-ph.SR

classification astro-ph.SR
keywords loophinodemagneticnetworkacousticanalysisanalyzeangstrom
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We analyze a time sequence of He II 256.32 angstrom images obtained with EIS/Hinode, sampling a small magnetic loop in magnetic network. Wavelet analysis indicates 11-min periodicity close to the loop apex. We interprete this oscillation as forcing through upward leakage by the fundamental acoustic eigenmode of the underlying field-free cavity. The observed loop length corresponds to the value predicted from this mechanism.

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