H-alpha contrast profiles of filament features

Details H-alpha contrast profiles of filament features H-alpha contrast profiles of filament features

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...46..149m&link_type=abstract

Solar Physics, vol. 46, Jan. 1976, p. 149-157.

Physics

10

Fine Structure, H Alpha Line, Solar Prominences, Solar Spectra, Cinematography, Filaments, Filtergrams, Solar Limb, Wavelengths

Scientific paper

The wavelength dependence of filament features is studied, using high-resolution filtergrams taken at seven wavelengths in H-alpha. The observed contrast profiles are compared with profiles calculated on the basis of Beckers' (1964) 'cloud' model. The deviation between observed and calculated profiles is used to suggest a progression among the observed profiles that depends on the height of the filament feature. Both upward and downward velocities are detected. The fine-scale features in the filament and the corresponding velocity field vary with a time constant of a few minutes.

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