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A comparison of preprocessing methods for solar force-free magnetic field extrapolation

Authors :
Fuhrmann, M.
Seehafer, N.
Valori, G.
Wiegelmann, T.
Source :
Astronomy and Astrophysics; February 2011, Vol. 526 Issue: 1
Publication Year :
2011

Abstract

Context.Extrapolations of solar photospheric vector magnetograms into three-dimensional magnetic fields in the chromosphere and corona are usually done under the assumption that the fields are force-free. This condition is violated in the photosphere itself and a thin layer in the lower atmosphere above. The field calculations can be improved by preprocessing the photospheric magnetograms. The intention here is to remove a non-force-free component from the data.

Details

Language :
English
ISSN :
00046361 and 14320746
Volume :
526
Issue :
1
Database :
Supplemental Index
Journal :
Astronomy and Astrophysics
Publication Type :
Periodical
Accession number :
ejs22890647
Full Text :
https://doi.org/10.1051/0004-6361/201015453