Network Loop Oscillations with EIS/Hinode

Details Network Loop Oscillations with EIS/Hinode Network Loop Oscillations with EIS/Hinode

2009-03-02

arxiv.org/abs/0903.0212v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

3 pages, 3 figures; To appear in "Magnetic Coupling between the Interior and the Atmosphere of the Sun", eds. S.S. Hasan and R

Scientific paper

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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