Effect of polarized radiative transfer on the Hanle magnetic field determination in prominences: Analysis of hydrogen H alpha line observations at Pic-du-Midi - Université Pierre et Marie Curie Accéder directement au contenu
Communication Dans Un Congrès Année : 1984

Effect of polarized radiative transfer on the Hanle magnetic field determination in prominences: Analysis of hydrogen H alpha line observations at Pic-du-Midi

Résumé

The linear polarization of the Hydrogen H alpha line of prominences has been computed, taking into account the effect of a magnetic field (Hanle effect), of the radiative transfer in the prominence, and of the depolarization due to collisions with the surrounding electrons and protons. The corresponding formalisms are developed in a forthcoming series of papers. In this paper, the main features of the computation method are summarized. The results of computation have been used for interpretation in terms of magnetic field vector measurements from H alpha polarimetric observations in prominences performed at Pic-du-Midi coronagraph-polarimeter. Simultaneous observations in one optically thin line (He I D(3)) and one optically thick line (H alpha) give an opportunity for solving the ambiguity on the field vector determination.
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hal-02393933 , version 1 (04-12-2019)

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Citer

V. Bommier, E. Landi Degl'Innocenti, J. L. Leroy, S. Sahal-Bréchot. Effect of polarized radiative transfer on the Hanle magnetic field determination in prominences: Analysis of hydrogen H alpha line observations at Pic-du-Midi. Marshall Space Flight Center Workshop "Measurements of Solar Vector Magnetic Fields", May 1984, Huntsville (Alabama), United States. pp.335-340. ⟨hal-02393933⟩
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