Vertical velocities and oscillations in quiescent filaments.

Details Vertical velocities and oscillations in quiescent filaments. Vertical velocities and oscillations in quiescent filaments.

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..134..275z&link_type=abstract

Solar Physics, Vol. 134, No. 2, p. 275 - 286

Physics

2

Scientific paper

Analysis of He I λ10830 Å spectral observations of a large, quiescent filament reveals a pronounced oscillatory behaviour of the vertical mass motion. The filament is situated in a quiet region more than 15° away from the nearest active region. It is concluded that the magnetic field of the quiescent filament, which occurs in the form of long thin flux ropes, moves with the gas and that there is no net mass flow perpendicular to the most frequently observed horizontal field lines. The oscillatory motion is accompanied by phase dependent variation of the He I line intensity which could possibly imply wave induced compression of the plasma.

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