The Evershed Effect with 0.2 arcsec Angular Resolution

Details The Evershed Effect with 0.2 arcsec Angular Resolution The Evershed Effect with 0.2 arcsec Angular Resolution

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..358...96m&link_type=abstract

Solar Polarization 4, ASP Conference Series, Vol. 358, Proceedings of the conference held 19-23 September, 2005, in Boulder, Col

Physics

2

Scientific paper

We present a preliminary analysis of penumbral spectra observed with unprecedented angular resolution (0.2 arcsec) using the new Swedish 1-m Solar Telescope. The use of a non-magnetic line allows us to measure Doppler shifts without magnetic contamination.
The observed Doppler shifts depend on the part of the line used for measuring, indicating that the velocity structure of penumbrae remains unresolved even with our resolution.
We find a correlation between upflows and bright filaments. This association is not specific of the outer penumbra but it also occurs in the inner penumbra.
The existence of such correlation was originally reported by tet{m1 BS69},
and it is suggestive of energy transport by convection in penumbrae.

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