The Evershed Effect with 0.2 arcsec Angular Resolution

Bibcode
2006ASPC..358...96M
Márquez, I.; Bonet, J. A.; Sánchez-Almeida, J.; Domínguez Cerdeña, I.
Bibliographical reference

Solar Polarization 4, ASP Conference Series, Vol. 358, Proceedings of the conference held 19-23 September, 2005, in Boulder, Colorado, USA. Edited by R. Casini and B. W. Lites, p.96

Advertised on:
12
2006
Number of authors
4
IAC number of authors
0
Citations
1
Refereed citations
1
Description
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.
Type
Non-refereed

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