| |
 |
| Paper: |
Velocities in Magnetoconvective Structures inside Sunspot Umbrae |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
217 |
| Authors: |
Ortiz, A.; Bellot Rubio, L. R.; Rouppe van der Voort, L. |
| Abstract: |
We study the velocity field of umbral dots at a resolution of 0.″14. Our analysis is based on full Stokes spectropolarimetric
measurements of a pore taken with the CRISP instrument at the Swedish 1-m Solar Telescope. We determine the flow velocity at
different heights in the photosphere from a bisector analysis of the Fe I 630 nm lines. We find that most umbral dots are
associated with strong upflows in deep photospheric layers. Some of them also show concentrated patches of downflows at their edges
with velocities of up to 1000 m s-1 and enhanced net circular polarization signals. These results appear to validate numerical
models of magnetoconvection in the presence of strong magnetic fields. |
|
|
|
|
|
