Atomic data and electron-impact broadening effect in DO white dwarf atmospheres: Si VI

Details Atomic data and electron-impact broadening effect in DO white dwarf atmospheres: Si VI Atomic data and electron-impact broadening effect in DO white dwarf atmospheres: Si VI

2008-05-04

arxiv.org/abs/0805.0395v1

Astronomy and Astrophysics

Astrophysics

MNRAS, accepted, 14 pages

Scientific paper

10.1111/j.1365-2966.2008.13284.x

Energy levels, electric dipole transition probabilities and oscillator strengths in five times ionized silicon have been calculated in intermediate coupling. The present calculations were carried out with the general purpose atomic-structure program SUPERSTRUCTURE. The relativistic corrections to the non-relativistic Hamiltonian are taken into account through the Breit-Pauli approximation. We have also introduced a semi-empirical correction (TEC) for the calculation of the energy-levels. These atomic data are used to provide semiclassical electron-, proton- and ionized helium- impact line widths and shifts for 15 Si VI muliplet. Calculated results have been used to consider the influence of Stark broadening for DO white dwarf atmospheric conditions.

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