Journal
SCIENCE
Volume 288, Issue 5470, Pages 1396-1398Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.288.5470.1396
Keywords
-
Categories
Ask authors/readers for more resources
We present time-series spectropolarimetric observations of sunspots in the Ca II infrared triplet Lines, which show a periodic occurrence of anomalous, asymmetric, circular polarization profiles in the umbral chromosphere. The profiles may be caused by the periodic development of an unresolved atmospheric component in a downward flowing magnetized environment. This active component with upward directed Velocities as high as 10 kilometers per second is connected to the umbral flash (UF) phenomenon. We can explain the observations with a semiempirical model of the chromospheric oscillation and of the sunspot magnetized atmospheric plasma during a UF event.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available