Time-dependent interaction of granules with magnetic flux tubes

Details Time-dependent interaction of granules with magnetic flux tubes Time-dependent interaction of granules with magnetic flux tubes

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981japa....2..133v&link_type=abstract

Journal of Astrophysics and Astronomy, vol. 2, June 1981, p. 133-139.

Physics

2

Magnetic Flux, Magnetohydrodynamic Flow, Photosphere, Solar Granulation, Solar Physics, Lines Of Force, One Dimensional Flow, Time Dependence, Unsteady Flow

Scientific paper

The time-dependent interaction of the granulation velocity field with a magnetic flux tube is investigated here. It is seen that when a magnetic field line is displaced normal to itself so as to simulate the buffeting action of granules, a flow of gas is initiated along the field. By choosing a lateral velocity field which is consistent with observations of granules, it is found that the resulting gas motion is a downward flow with a velocity compatible with the observed downflow in isolated photospheric flux tubes. It is therefore proposed that the observed photospheric downflow is a manifestation of the interaction of granules with flux tubes.

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