Evidence for quasi-periodic Doppler motions in solar prominences

Details Evidence for quasi-periodic Doppler motions in solar prominences Evidence for quasi-periodic Doppler motions in solar prominences

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...163..343b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 163, no. 1-2, July 1986, p. 343-346.

Astronomy and Astrophysics

Astrophysics

34

Doppler Effect, Solar Oscillations, Solar Prominences, H Alpha Line, Power Spectra

Scientific paper

Observations of Doppler displacements in solar prominences have been performed using the Hα emission line. Evidence is found for the existence of quasi-periodic line-of-sight velocities in the range of 2.5 - 4.7 mHz. Former findings of long time variations near one hour are confirmed. Possible influences by misguiding and by image motion can be excluded. Scattered light from the solar aureola cannot produce the observed amplitudes.

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