Micro-structured magnetic atmospheres |
| |
| Authors: | J Sánchez Almeida E Landi Degl'innogenti |
| |
| Institution: | (1) Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain |
| |
| 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.On leave from the Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi 5, I-50125 Firenze, Italy |
| |
| Keywords: | Line asymmetries Polarized radiation transfer Structure of the photospheric magnetic fields |
| 本文献已被 SpringerLink 等数据库收录！ |
|
