Long period prominence loop oscillations excited by slow magnetosonic waves.

Details Long period prominence loop oscillations excited by slow magnetosonic waves. Long period prominence loop oscillations excited by slow magnetosonic waves.

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996brjph..26..590d&link_type=abstract

Braz. J. Phys., Vol. 26, No. 3, p. 590 - 596

Physics

Solar Prominences: Oscillations

Scientific paper

The slow magnetosonic waves can, under certain conditions, have a discrete set of regular eigenmodes similar to the discrete Alfvén wave spectrum. The latter were shown to explain the short period (2 - 8 min) prominence loop oscillations as global Alfvén modes. The authors show that the discrete slow wave spectrum can explain the long period (24 - 84 min) oscillations of solar loop prominences. Conditions for the existence of a discrete slow wave spectrum are given. They also estimated the Q(Q-1 = Imω/ω) factor, due to electron and ion Cherenkov damping, for the loop cavity and that the value of Q ≡ 6 is compatible with the observations.

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