solrat 1.2.1

Solar Radiative Transfer non-LTE forward-modeling code.

SolRaT

SolRaT (Solar Radiative Transfer) is a flexible forward modeling code for non-LTE transfer of radiation in stellar atmospheres. SolRaT is specifically designed for prototyping and adjustments of the radiative transfer models for specific contexts.

Features available out-of-the-box:

• RTE frameworks: Multi-Term Atom; Multi-Level Atom; Multi-Term semi-LTE Atom [LL04].
• Magnetic Fields: Zeeman – Hanle – Paschen-Back for Multi-Term Atom; Zeeman – Hanle for Multi-Level atom.
• Atomic Level Polarization: Fully supported.
• Radiation Tensor $J_Q^K$: Tabulated from [ATL08] (for coronal/chromospheric lines) or NLTE self-consistent.
• Atmospheres: Multiple constant-property slabs.
• Pre-configured lines: He I D3, Mn I 5432.5 Å, Ni I 5435.9 Å, Fe I 5434.523 Å.

Installation:

Install SolRaT directly from PyPi by running pip install solrat.

Documentation:

Detailed documentation is available at https://solrat.readthedocs.io/. Quick start example is available at https://solrat.readthedocs.io/latest/quickstart.html. Additional demos and validation against [LL04] and [HAZEL2] are available in demos.

Citing:

Journal article is pending. In the meantime, if SolRaT has found use in your research, please cite it as

Yakovkin I. I. SolRaT (2023) [computer software]. Retrieved from https://www.yakovkinii.com/solrat/

References:

[LL04] Landi Degl’Innocenti, E., & Landolfi, M. 2004, Polarization in Spectral Lines (Dordrecht: Kluwer)

[ATL08] Asensio Ramos, A., Trujillo Bueno, J., & Landi Degl’Innocenti, E. (2008). Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects. The Astrophysical Journal, 683(1), 542–565.

[HAZEL2] Link

Keywords:

Non-LTE, Stokes Profiles, Inversion, Synthesis, Paschen-Back, Hanle, Zeeman, Magnetic Fields, Sun, Solar Atmosphere, Radiative Transfer, Spectral Line Polarization, Spectral Lines, Multi-Term Atom Model, Multi-Level Atom Model, Atomic Polarization.

Copyright (2023) Ivan I. Yakovkin