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

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 th...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2008-06, Vol.387 (2), p.871-882
Main Authors: Hamdi, R, Ben Nessib, N, Milovanovic, N, Popovic, L C, Dimitrijevic, MS, Sahal-Brechot, S
Format: Article
Language:English
Subjects:
Astrophysics
Physics
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Summary: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 [term energy corrections (TEC)] for the calculation of the energy levels. These atomic data are used to provide semiclassical electron-, proton- and ionized helium-impact linewidths and shifts for 15 Sivi multiplet. Calculated results have been used to consider the influence of Stark broadening for DO white dwarf atmospheric conditions.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2008.13284.x