Radiative transfer codes

Different type of codes describing Non-LTE (NLTE) radiative transfer are available here, in 1D and 2D. The first type (PROM4, PROM5, PROM7, PRODOP, PROMCOR, HYDR_NV, CYMAD2D, C2D2E) is dedicated to different part of solar atmosphere (solar prominences and filaments, solar and stellar atmospheres (slab or cylinder)). The second type presents 2D codes for radiative modelling of isolated structures, with simple model-atoms  (using MALI and Gauss-Seidel).

Beside, different tools for Non-LTE radiative transfer are available here : they can be used to construct new models.

Click on the following links to download the package source file and the user guide.

Contacts: Frédéric Paletou (frederic.paletou/at/univ-tlse3.fr) & Martine Chane-Yook (martine.chane-yook/at/ias.u-psud.fr)

PROM4 is designed to compute simple models of solar prominences. The code computes electron and hydrogen level populations and hydrogen profiles. For a recent version, see PROM7.

PROM5 is similar to PROM7, but deals with radiative transfer for hydrogen atom in prominences. The physical properties of the model vary across the prominence.

PROM7 describes 1D NLTE radiative transfer in solar prominences or filaments, using partial frequency redistribution (PRD). The models of atmosphere considered here are isobaric and isothermal. The code computes hydrogen and calcium spectra emitted by prominences or filaments.

PRODOP is another version of PROM7 including PROM5, producing also helium and  magnesium spectra, in addition of those of hydrogen and calcium. The code includes a vertical velocity field.

PROMCOR is inherited from PROM5 but treats models where the thermodynamic parameters only depend on the distance to the Sun. It is valid only for (coronal) media optically thin in all lines and continua.

HYDR_NV describes 1D NLTE radiative transfer for hydrogen atom in stellar or solar atmosphere using partial frequency redistribution (PRD).

Another version of HYDR_NV producing magnesium spectrum will be available soon.

CYMA2DV describes 2D NLTE radiative transfer for hydrogen atom in cylindrical thread with incident radiation and 3D velocity fields using complete frequency redistribution (CRD).

Another version of CYMA2DV producing magnesium spectrum will be available soon.

C2D2E describes 2D NLTE radiative transfer for hydrogen and helium atoms in cylindrical thread with incident radiation using complete frequency redistribution (CRD).

Another version of C2D2E producing magnesium spectrum will be available soon.

The purpose of these 2D codes is the radiative modelling of isolated structures, with simple model-atoms.

 

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