Dynamics in the filaments. I - Oscillations in a quiescent filament

Details Dynamics in the filaments. I - Oscillations in a quiescent filament Dynamics in the filaments. I - Oscillations in a quiescent filament

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...102..124m&link_type=abstract

Astronomy and Astrophysics, vol. 102, no. 1, Sept. 1981, p. 124-128.

Astronomy and Astrophysics

Astrophysics

34

Chromosphere, Fourier Analysis, H Alpha Line, Radial Velocity, Solar Oscillations, Solar Prominences, Astronomical Maps, Data Reduction, Solar Spectra, Spectrographs, Spectrum Analysis, Velocity Distribution

Scientific paper

A quiescent filament is observed by the 9 channel MSDP spectrograph operating on the Meudon Observatory tower during 720 s with a 30 s time step. The field view of 6 x 1 arcmin permits the study of the dynamics of 50 oscillation cells which increases the freedom degree comparatively to the one slit spectrograph techniques. A Fourier analysis of the radial velocity measured in the H-alpha line shows that the steady velocities are upward in the filament, while the chromospheric oscillations are almost undetectable inside the filament.

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