Magnetic field strength in solar flux tubes - A model atmosphere independent determination

Bibcode
1988A&A...196..266S
Sanchez Almeida, J.; Collados, M.; del Toro Iniesta, J. C.; Solanki, S. K.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 266-268.

Advertised on:
5
1988
Number of authors
4
IAC number of authors
3
Citations
12
Refereed citations
12
Description
The "line ratio method" (Stenflo, 1973) has been extensively used in the past to carry out measurements of the magnetic field strength in spatially unresolved magnetic flux concentrations. The authors present here a new variant of this technique, which is particularly simple as it does not depend on any radiative transfer calculations and thus the assumption of a model atmosphere is not required. General properties of the transfer equation lead to a relationship between the circular polarization generated by two lines which are identical except for their Landé factors. This can be used to directly determine the field strength from the measured line profiles. In order to test the method the authors have applied it to experimental data. A comparison with the traditional line ratio method is shown.
Type
Refereed
Solar atmosphere

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