Sunspots and Active Region Filaments: What do they have in common?
Abstract
Sunspots are preceded by a well documented and spectacular phase of magnetic flux emergence, easy to idnetify in almost any spectral range. This phase is followed by a more subtle process of flux disappearance that includes diffusion and magnetic cancellation. The decay phase coincides with the development of an active region filament at the Neutral Line that slowly evolves and often gets spelled in CME events. These Active Region filaments harbor field strengths of several hundredths of Gauss which represent the strongest field concentrations second only to the sunspots themselves. However, no link between the sunspots and the Active Region filaments are known to exists. The conditions under which these two ingredients of Active Regions can indeed be related to each other will be reviewed in the light of recent observations made in the He 10830 A spectral region.
- Publication:
-
SDO-3: Solar Dynamics and Magnetism from the Interior to the Atmosphere
- Pub Date:
- October 2011
- Bibcode:
- 2011sdmi.confE...7M
- Keywords:
-
- SDO;
- SDO-3;
- SDO 3;
- SDO Workshop;
- LWS/SDO-3/SOHO-26/GONG-2011 Workshop;
- Solar Dynamic Observatory