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..275y&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 134, Aug. 1991, p. 275-286.

Physics

53

Solar Oscillations, Solar Prominences, Vertical Motion, Doppler Effect, Velocity Distribution

Scientific paper

Analyses of He I 10830 A spectral observations of a large, quiescent filament reveals a pronounced oscillatory behavior of the vertical mass motion. The filament is situated in a quiet region more than 15 deg 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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