Oscillations of the H-alha emission in solar prominences

Details Oscillations of the H-alha emission in solar prominences Oscillations of the H-alha emission in solar prominences

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...94..285w&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 94, Sept. 1984, p. 285-288.

Physics

40

H Alpha Line, Solar Prominences, Solar Spectra, Doppler Effect, Emission Spectra, Fourier Analysis, Oscillations, Power Spectra

Scientific paper

The time dependence of Doppler shift and line-center intensity is simultaneously observed for the Hα emission of three solar prominences, each one during about two hours. Doppler oscillations with periods near one hour and amplitudes between 1 and 2 km s-1 are conspicuously visible in the recordings of all three prominences. Fourier analysis yields periods of 50, 60, and 64 min, as well as slight indications of short periods near 3 and 5 min. No oscillations are found in the line-center brightness.

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