Physics
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003soph..215..261s&link_type=abstract
Solar Physics, v. 215, Issue 2, p. 261-280 (2003).
Physics
4
Scientific paper
For the leading part of sunspot group NOAA 8323, which rapidly changed its complex structure, a time series of the line-of-sight (LOS) component of the velocity field was obtained. With a two-dimensional Fabry-Pérot spectrometer, the magnetically insensitive line Fei 557.6 nm was scanned. The inclination of the LOS (heliographic angle) to the vertical was θ=28.5°. The umbra of the observed spot was divided by a system of light bridges into several parts. The spatial and temporal velocity field also exhibits a considerable complexity: in one extended umbral area there is a downward flow of 1 km s-1 relative to other dark sub-umbrae. At the center-side penumbra, with a line-of-sight Evershed outflow of 1.5 km s-1, a persistent patch, somewhat darker than the average penumbra, has a LOS velocity of 1.3 km s-1 in opposite direction, probably a downflow. At the limb-side penumbra, a photosphere-like area is interspersed, interrupting the Evershed flow which resumes with typical strength beyond this feature towards the outer penumbral boundary. Most interesting is the behavior of the light bridges, which have a slight blue shift, interrupted by short events of strong blue or red shifts which - within the time resolution of 35 s - instantly affect a considerable part of a light bridge.
Balthasar Horst
Schleicher Helmhold
Wöhl Hubertus
No associations
LandOfFree
Velocity Field of a Complex Sunspot with Light Bridges does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Velocity Field of a Complex Sunspot with Light Bridges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity Field of a Complex Sunspot with Light Bridges will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1511155