- Photo owner: iSGTW
- Date Taken: October 28, 2008 - 6:44pm
- Date Uploaded: November 2, 2009 - 12:45pm
- Views: 65
| Copyright UCAR, image courtesy Matthias Rempel, NCAR.
The interface between a sunspot's umbra (dark center) and penumbra (lighter outer region) shows a complex structure with narrow, almost horizontal (lighter to white) filaments embedded in a background having a more vertical magnetic field. Farther out, extended patches of horizontal field dominate. NCAR scientists and colleagues modeled this complex structure in a 3D computer simulation, giving scientists their first glimpse below the visible surface to understand the underlying physical processes.