2019/08/16 by K. M. Aggarwal, Aggarwal, K M
Engineering · Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Atomic and Molecular Physics #FOS: Physical sciences #Laser-induced spectroscopy and plasma #Solar and Stellar Astrophysics (astro-ph.SR) #X-ray Spectroscopy and Fluorescence Analysis
paper · pdf · doi:10.48550/arxiv.1908.05931
openalex publication_date 2019/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In a recent paper, Tayal et al. [\em Astrophys. J. Suppl. \bf 2019, \emph 242, 9] have reported results for energy levels, radiative rates (A-values) and effective collision strengths (Υ) for transitions among the 198 levels of Si-like S~III. For the calculations they have adopted the multi-configuration Hartree-Fock (MCHF) code for the energy levels and A-values, and B-spline R-matrix (BSR) code for Υ. Their reported results appear to be accurate for energy levels and A-values, but not for Υ. Through our independent calculations by adopting the flexible atomic code (FAC), we demonstrate that their reported results for Υ are underestimated, by up to a factor of two, and at all temperatures, particularly for the allowed transitions, but some forbidden ones too. Additionally, for transitions involving the higher levels the behaviour of their Υ results is not correct.