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Volume 9, 2003
Magnetism and Activity of the Sun and Stars
Page 71
DOI 10.1051/eas:2003087

Magnetism and Activity of the Sun and Stars
J. Arnaud and N. Meunier (eds)
EAS Publications Series, Vol. 9, 2003
DOI: 10.1051/eas:2003087

The Differential Saturation Mechanism: an Application of the Zeeman Effect to the Diagnostic of Magnetic Fields

E. Landi Degl'Innocenti

Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 2, 50125 Firenze, Italy


Abstract
A review of broad-band polarimetric observations is presented, from the first systematic observations of Jean-Louis Leroy in sunpots and active regions to the more recent applications concerning the polarization diagrams of chemically peculiar stars. The historical evolution of the interpretation is also discussed, with particular emphasis on the differential saturation mechanism and on its physical meaning.



© EAS, EDP Sciences 2003


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