Atomic data and electron-impact broadening effect in DO white dwarf atmospheres: Si vi |
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| Authors: | R Hamdi N Ben Nessib N Milovanovi&#; L&#; Popovi&#; M S Dimitrijevi&#; S Sahal-Bréchot |
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| Institution: | Groupe de Recherche en Physique Atomique et Astrophysique, Institut National des Sciences Appliquées et de Technologie, Centre Urbain Nord B. P. No. 676, 1080 Tunis Cedex, Tunisia;Astronomical observatory, Volgina 7, 11160 Belgrade 74, Serbia;Laboratoire d'Étude du Rayonnement et de la Matière en Astrophysique, UMR CNRS 8112, Observatoire de Paris-Meudon, 92195 Meudon, France |
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| Abstract: | 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 Si vi multiplet. Calculated results have been used to consider the influence of Stark broadening for DO white dwarf atmospheric conditions. |
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| Keywords: | atomic data atomic processes line: formation stars: atmospheres white dwarfs |
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