Time-dependent interaction of granules with magnetic flux tubes
Abstract
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.
- Publication:
-
Journal of Astrophysics and Astronomy
- Pub Date:
- June 1981
- DOI:
- 10.1007/BF02715673
- Bibcode:
- 1981JApA....2..133V
- Keywords:
-
- Magnetic Flux;
- Magnetohydrodynamic Flow;
- Photosphere;
- Solar Granulation;
- Solar Physics;
- Lines Of Force;
- One Dimensional Flow;
- Time Dependence;
- Unsteady Flow;
- Solar Physics