Efficient Computation of Collisional $\ell$-mixing Rate Coefficients in Astrophysical Plasmas

 Title Efficient Computation of Collisional $\ell$-mixing Rate Coefficients in Astrophysical Plasmas Publication Type Journal Article Year of Publication 2019 Authors Vrinceanu, D, Onofrio, R, Oonk, JBR, Salas, P, Sadeghpour, HR Journal The Astrophysical Journal Volume 879 Pagination 115 Date Published jul Abstract We present analytical expressions for direct evaluation of ℓ-mixing rate coefficients in proton-excited hydrogen atom collisions and describe a software package for efficient numerical evaluation of the collisional rate coefficients. Comparisons between rate coefficients calculated with various levels of approximation are discussed, highlighting their range of validity. These rate coefficients are benchmarked for radio recombination lines for hydrogen, evaluating the corresponding departure coefficients from local thermal equilibrium. URL https://doi.org/10.3847%2F1538-4357%2Fab218c DOI 10.3847/1538-4357/ab218c
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