Collision strengths and transition probabilities for Co III forbidden lines

TL;DR

This paper calculates collision strengths, transition probabilities, and line emissivities for Co III forbidden lines, aiding the analysis of supernova ejecta conditions.

Contribution

It provides new atomic data for Co III forbidden lines, including collision strengths and transition probabilities, for the first time.

Findings

Calculated collision strengths and transition probabilities for Co III.

Predicted line emissivities useful for supernova analysis.

Data applicable to thermodynamic condition diagnostics.

Abstract

In this paper we compute the collision strengths and their thermally-averaged Maxwellian values for electron transitions between the fifteen lowest levels of doubly-ionised cobalt, Co^{2+}, which give rise to forbidden emission lines in the visible and infrared region of spectrum. The calculations also include transition probabilities and predicted relative line emissivities. The data are particularly useful for analysing the thermodynamic conditions of supernova ejecta.