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| Paper: |
Observations of Supersonic Downflows in a Sunspot Light Bridge as Revealed by Hinode |
| Volume: |
454, The 3rd Hinode Science Meeting |
| Page: |
205 |
| Authors: |
Louis, R. E.; Bellot Rubio, L. R.; Mathew, S. K.; Venkatakrishnan, P. |
| Abstract: |
Recent high resolution spectropolarimetric observations from Hinode
detected the presence of supersonic downflows in a sunspot light bridge (Louis et al. 2009).
These downflows occurred in localized patches, close to regions where
the field azimuth changed by a large value. This apparent discontinuity
in the field azimuth was seen along a thin ridge running along the western
edge of the light bridge. Some, but not all, of these downflowing patches were co-spatial
with chromospheric brightness enhancements seen in Ca II H filtergrams. The
presence of magnetic inhomogeneities at scales of 0.″3 could
facilitate the reconnection of field lines in the lower chromosphere
whose signatures might be the supersonic downflows and the
brightness enhancements that have been observed. |
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