Synthetic spectra of the auroras

The auroral emissions are due to electron precipitations into the upper atmosphere in polar regions. These electrons populations, called suprathermal, due to their high energies (10 eV to 50/100 keV) generates some emissions mainly in the green (O I 557 nm), the red (O I 630-636 nm) and the purple (N2+ 427 nm). However the spectra contains much more lines especially molecular bands such as the 1st, 2nd postive bands and the Vegard Kaplan band of molecular nitrogen which produces structured vibrational emissons. It is then important to be able to get quasi exhaustive simulations of these emissions. Based on kinetic calculations from the Transsolo code, we implemented simulations of almost all the visible emissions lines of the auroras parametized by the particle precipitations. The code used MSIS 2.0 as atmospheric model, IRI 2020 for the ionosphere and a very large set of updated cross sections. We propose in this work to present the result of these simulatins in different conditions and to consider the potential uses of such calculations for different auroral physics applications.