Issue |
A&A
Volume 629, September 2019
|
|
---|---|---|
Article Number | A24 | |
Number of page(s) | 16 | |
Section | Numerical methods and codes | |
DOI | https://doi.org/10.1051/0004-6361/201935692 | |
Published online | 02 September 2019 |
FIRTEZ-dz
A forward and inverse solver of the polarized radiative transfer equation under Zeeman regime in geometrical scale
1
Leibniz Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany
e-mail: apy@leibniz-kis.de
2
Instituto de Astrofísica de Canarias, C. Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain
3
Departamento de Astrofísica de Canarias, Universidad de La Laguna, Avda Astrofísico Sánchez s/n, 38206 La Laguna, Tenerife, Spain
Received:
13
April
2019
Accepted:
9
July
2019
We present a numerical code that solves the forward and inverse problem of the polarized radiative transfer equation in geometrical scale under the Zeeman regime. The code is fully parallelized, making it able to easily handle large observational and simulated datasets. We checked the reliability of the forward and inverse modules through different examples. In particular, we show that even when properly inferring various physical parameters (temperature, magnetic field components, and line-of-sight velocity) in optical depth, their reliability in height-scale depends on the accuracy with which the gas-pressure or density are known. The code is made publicly available as a tool to solve the radiative transfer equation and perform the inverse solution treating each pixel independently. An important feature of this code, that will be exploited in the future, is that working in geometrical-scale allows for the direct calculation of spatial derivatives, which are usually required in order to estimate the gas pressure and/or density via the momentum equation in a three-dimensional volume, in particular the three-dimensional Lorenz force.
Key words: methods: data analysis / methods: numerical / techniques: polarimetric / polarization / radiative transfer
© ESO 2019
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.