Stellar And Interstellar Transition Lines Of C IV, N V And OVI

Abstract

In this paper, we study the parameters of allowed and forbidden transition lines for lithium-like ions (C IV, N V, and O VI), which are vital for understanding the dynamics, internal temperatures, densities, and chemical abundances of stellar atmospheres and the interstellar medium (ISM).  Using the Relativistic Coupled-Cluster (RCC) method incorporating single, double, and partial triple excitations (CCSD(T)) alongside the Dirac-Coulomb-Breit (DCB) Hamiltonian, the we calculate core correlation energies, ionization potentials, oscillator strengths, and hyperfine structures. The accuracy of the generated atomic wavefunctions is confirmed by the close agreement between the length and velocity gauges of the reduced electric dipole (E1) matrix elements.