Inelastic Mg+H collision data for non-LTE applications in stellar atmospheres

TL;DR

This paper provides quantum mechanically calculated inelastic Mg+H collision data for all relevant transitions, crucial for accurate non-LTE modeling in cool stellar atmospheres, with estimated uncertainties included.

Contribution

It introduces comprehensive quantum scattering-based rate coefficients for Mg+H collisions across multiple energy levels, enhancing non-LTE stellar atmosphere models.

Findings

Rate coefficients cover 500-8000 K temperature range.

Uncertainty estimates for the calculated rate coefficients.

Data applicable to non-LTE modeling in cool stellar environments.

Abstract

Rate coefficients for inelastic Mg+H collisions are calculated for all transitions between the lowest seven levels and the ionic state (charge transfer). The rate coefficients are based on cross-sections from full quantum scattering calculations, which are themselves based on detailed quantum chemical calculations for the MgH molecule. The data are needed for non-LTE applications in cool astrophysical environments, especially cool stellar atmospheres, and are presented for a temperature range of 500-8000 K. From consideration of the sensitivity of the cross-sections to various uncertainties in the calculations, most importantly input quantum chemical data and the numerical accuracy of the scattering calculations, a measure of the possible uncertainties in the rate coefficients is estimated.