Polarization of the sodium D lines in prominences |
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| Authors: | M Landolfi E Landi Degl'innocenti |
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| Institution: | (1) Osservatorio Astrofisico di Arcetri, France;(2) Istituto di Astronomia, Università di Firenze, France |
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| Abstract: | The expected polarization of the sodium D lines from solar prominences is computed as a function of the local magnetic field vector. To this aim, the formulation of the Hanle effect in terms of the statistical tensors developed by Landi Degl'Innocenti (1982) is employed, with minor changes connected to hyperfine structure. The sodium atoms are described in the incomplete Paschen-Back regime so that the validity of the results is not limited to  weak magnetic fields. The polarization diagrams obtained are discussed and compared with the corresponding diagrams for the helium D3 line. |
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