Chromospheric magnetic fields. Observations, simulations and their interpretation

TL;DR

This paper evaluates the reliability of non-LTE inversion techniques applied to the Ca II 8542 Å line using 3D simulations, advancing understanding of chromospheric magnetic fields in the quiet Sun.

Contribution

It demonstrates that NLTE inversions can reliably estimate physical parameters of the chromosphere from synthetic observations.

Findings

NLTE inversions produce realistic physical estimates.

Simulations validate the use of Ca II 8542 Å line for magnetic field analysis.

The study enhances interpretation of chromospheric magnetic data.

Abstract

The magnetic field of the quiet-Sun chromosphere remains a mystery for solar physicists. The reduced number of chromospheric lines are intrinsically hard to model and only a few of them are magnetically sensitive. In this work, we use a 3D numerical simulation of the outer layers of the solar atmosphere, to asses the reliability of non-LTE inversions, in this case applied to the Ca II 8542 \AA\ line. We show that NLTE inversions provide realistic estimates of physical quantities from synthetic observations.