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Micro-structured magnetic atmospheres

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Abstract

Asymmetrical Stokes profiles are produced if the photospheric magnetic and velocity fields are structured on scales smaller than the mean-free-path of the photons. Here we put forward a compact analytical expression for the radiative transfer equation in this case. Explicitly, micro-variations of the magnetic field strength and the velocity are considered. The existence of micro-structures might have serious implications on the techniques currently used to measure solar magnetic fields. For example, we show the failure of the relationship employed to calibrate magnetographs.

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Authors and Affiliations

  1. Instituto de Astrofísica de Canarias, E-38200, La Laguna, Tenerife, Spain

    J. Sánchez Almeida & E. Landi Degl'innogenti

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  1. J. Sánchez Almeida
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  2. E. Landi Degl'innogenti
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On leave from the Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 5, I-50125 Firenze, Italy

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Sánchez Almeida, J., Landi Degl'innogenti, E. Micro-structured magnetic atmospheres. Sol Phys 164, 203–210 (1996). https://doi.org/10.1007/BF00146634

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