Bibcode
Khomenko, E.; Collados, M.,
Bibliographical reference
Solar Polarization 4, ASP Conference Series, Vol. 358, Proceedings of the conference held 19-23 September, 2005, in Boulder, Colorado, USA. Edited by R. Casini and B. W. Lites, p.42
Advertised on:
12
2006
Citations
3
Refereed citations
2
Description
The results of the determination of magnetic field strength and flux
from weak polarimetric signals in solar inter-network regions are
contradictory. We investigate the origin of this contradiction with the
help of MHD simulations. It is shown that the Stokes-V line ratio of the
Fe I 5247/5250 Å and 15652/15648 Å line pairs is a good
indicator of kG magnetic field concentrations, even for magnetic fields
with a complex internal structure like those in MHD simulations. On the
contrary, the Stokes-V line ratio of the Fe I 6301/6302 Å lines
shows no correlation with magnetic field strength. The reason lies in
the large difference in the heights of formation of these two lines. The
value of the magnetic field strength obtained from the inversion of the
Fe I 6301 Å and 6302 Å lines depends crucially on the
treatment of gradients of magnetic field, LOS velocity, and temperature
even at numerical spatial resolution of 20 km.