Grid of 3D non-LTE Sodium abundance corrections and synthetic spectra of late-type stars

Grid of synthetic stellar spectra for the most important spectral lines of Na I in 3D NLTE and 3D LTE in FGK-type stars.
The file 3Dflux_all.fits contains the normalized fluxes in 3D NLTE and 3D LTE at the nodes of the grid. The ReadMe file describes the content of the fits file in detail.
The folders rbf/ and ffnn/ contain the interpolation models for the line profiles and the reduced equivalent widths, respectively.
All the synthetic spectra were produced with the public 3D Stagger-model atmospheres (Rodriguez-Diaz et al. 2024), performing radiative transfer calculations with the Balder code (Amarsi et al. 2018).
We also provide the file interp_tools.py with python functions to access, read and interpolate the data to user-defined stellar parameters of Teff, logg, [Fe/H], A(Na) (as well as vmic for 1D models).
The interpolate_rbf.py file also contain a script to perform the interpolation of the line profiles with the radial basis functions (RBF) method.
The scalar.py file is also needed for this interpolation.
Examples are provided in the file examples.py.
The synthesized Na I spectral lines are at the following wavelengths: 4982.81 Å, 5684.22 Å, 5689.78 Å, 5891.58 Å, 5897.56 Å, 6154.23 Å, 6160.75 Å, 8182.56 Å, 8197.06 Å, 10749.30 Å.