Five minute microwave solar oscillations

Details Five minute microwave solar oscillations Five minute microwave solar oscillations

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...67...83s&link_type=abstract

Solar Physics, vol. 67, Aug. 1980, p. 83-87. Research supported by the Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, Tec

Physics

17

Microwave Emission, Periodic Variations, Solar Oscillations, Magnetohydrodynamic Waves, Photosphere, Solar Flares, Standing Waves

Scientific paper

Oscillations with a period of 5.6 min were observed on July 10, 1978 while tracking at 22 GHz the active region McMath 15403. The oscillations were strong, clearly defined, had no damping, and lasted for about two hours. The rarity of the phenomenon is indicated by the fact that it occurred only once in more than 250 hr of solar observations. The possibility that these oscillations are due to a standing Alfven wave driven by the photospheric velocity field is discussed.

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