Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..71..203c&link_type=abstract
Astrophysics and Space Science, vol. 71, no. 1, Aug. 1980, p. 203-209.
Astronomy and Astrophysics
Astronomy
3
Coronal Loops, Electric Current, Energy Transfer, Photosphere, Solar Wind, Astronomical Models, Cosmic Plasma, Kinetic Energy, Skylab Program, Solar Activity Effects, Solar Corona, Solar Terrestrial Interactions, Spaceborne Astronomy
Scientific paper
A direct transfer of energy from photospheric activity to the solar wind by means of electric currents is discussed. Currents are assumed to flow in quiescent prominences which occasionally erupt and give rise to expanding loop-like structures in the corona, as observed from Skylab. Due to expansion, the legs of the loops are transformed into coronal rays which carry currents from the photosphere to the outer parts of the corona or interplanetary medium and then back again to the photosphere. It is proposed that energy is transferred from photospheric activity to the solar wind in the following ways: (1) as kinetic energy of the ejected loop matter; (2) as electric power directly fed into the extended loops; and (3) as torsional waves produced by fluctuations in the loop currents.
Alfvén Hannes
Carlqvist Per
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