Perturbation of the Granular Pattern by the Presence of Magnetic Flux Tubes
Abstract
The presence of flux tubes, visible as Network Bright Points (NBP) at the surface of the Sun outside active regions, disturbs the granular pattern in a similar way as it can be observed in laboratory convection experiments. Around an NBP, granules are smaller, more numerous than around a normal intergranular space without NBP; they are elongated and pointing towards it. Such a perturbation is visible several minutes before the appearance of the NBP, indicating that the magnetic flux, although not yet visible as a bright point, is already interacting with the convection pattern. The perturbation reaches its maximum within one minute after the NBP appearance; and the granular pattern returns to normal just after the NBP disappearance.
- Publication:
-
Solar Physics
- Pub Date:
- September 1989
- DOI:
- 10.1007/BF00146177
- Bibcode:
- 1989SoPh..119..229M
- Keywords:
-
- Brightness Distribution;
- Magnetic Flux;
- Photosphere;
- Solar Granulation;
- Line Spectra;
- Solar Activity;
- Solar Physics;
- Convection;
- Active Region;
- Magnetic Flux;
- Flux Tube;
- Bright Point