Some regularities of velocity oscillations in prominences

Details Some regularities of velocity oscillations in prominences Some regularities of velocity oscillations in prominences

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...279..610b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 279, no. 2, p. 610-614

Astronomy and Astrophysics

Astrophysics

11

Chromosphere, Photosphere, Power Spectra, Solar Oscillations, Solar Prominences, Solar Spectra, Astronomical Spectroscopy, H Alpha Line, H Beta Line, Magnetic Signatures, Spectrograms

Scientific paper

At present three types of velocity oscillations in quiescent prominences are distinguished: (1) long-period oscillations (with oscillation periods of 40-80 min), (2) oscillations with periods of 10-40 min, and (3) short-period oscillations with periods of 10-40 min, and (3) short-period oscillations (3-10 min). By analyzing our observational data obtained at the Sayan Observatory during 1981-1989, we have detected: (1) a dependence of the period of long-period velocity oscillations in prominences on the heliolatitude, and (2) velocity oscillations with periods of 10-40 min (amplitudes of 30-300 m/s) which are interpreted as the eigenmodes of prominences.

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