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Molodij Guillaume, Bommier Véronique

Inclusion of velocity gradients in the Unno solution for magnetic field diagnostic from spectropolarimetric data

In "Advances in Plasma Astrophysics", I.A.U. Symposium 274, 6-10 September 2010, Giardini Naxos (Italie)IAU Symposium Proceedings Series, 2011, vol. 274, pp. 291-294

Référence DOI : 10.1017/S1743921311007150
Référence ADS : 2011IAUS..274..291M

Résumé :

We present an extension of the Unno-Rachkovsky solution that provides the theoretical profiles coming out of a Milne-Eddington atmosphere imbedded in a magnetic field, to the additional taking into account of a vertical velocity gradient. Thus, the theoretical profiles may display asymmetries as do the observed profiles, which facilitates the inversion based on the Unno-Rachkovsky theory, and leads to the additional determination of the vertical velocity gradient. We present UNNOFIT inversion on spectropolarimetric data performed on an active region of the Sun with the french-italian telescope THEMIS operated by CNRS and CNR on the island of Tenerife.

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