MILAN S. DIMITRIJEVIĆ1, NENAD MILOVANOVIĆ1,

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STARK BROADENING PARAMETERS OF S II SPECTRAL LINES FOR STELLAR PLASMA CONDITIONS MILAN S. DIMITRIJEVIĆ1, NENAD MILOVANOVIĆ1, ZORAN SIMIĆ1, SYLVIE SAHAL-BRÉCHOT2 1Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia 2LERMA, Observatoire de Paris, Meudon, France E-mail: mdimitrijevic@aob.rs, nmilovanovic@aob.rs, zsimic@aob.rs, sylvie.sahal-brechot@obspm.fr

Spectral lines of ionized sulfur have been observed in stellar spectra(see e.g. Adelman and Pintaldo (2000), Adelman et al. (2001)), so that their Stark broadening parameters are needed for sulfur abundance determination, radiative transfer calculations as well as for stellar spectra analysis and synthesis. Stark broadening is particularly significant for white dwarfs, post AGB stars, pre- white dwarfs and for A type stars.

PART OF TABLE: 3 of 12 calculated SC method: PERTURBER DENSITY = 1 PART OF TABLE: 3 of 12 calculated SC method: PERTURBER DENSITY = 1.E+17cm-3 PERTURBERS ARE: ELECTRONS PROTONS NIZED HELIUM TRANSITION T(K) WIDTH(A) SHIFT(A) WIDTH(A) SHIFT(A) WIDTH(A) SHIFT(A) S II 3d 4p 5000. 0.836 0.558E-01 0.400E-01 0.126E-02 0.507E-01 0.125E-02 5606.11 A 10000. 0.651 0.407E-01 0.598E-01 0.268E-02 0.703E-01 0.255E-02 C= 0.63E+20 20000. 0.513 0.346E-01 0.743E-01 0.474E-02 0.804E-01 0.420E-02 30000. 0.454 0.247E-01 0.803E-01 0.581E-02 0.860E-01 0.512E-02 50000. 0.406 0.227E-01 0.875E-01 0.747E-02 0.922E-01 0.627E-02 100000. 0.365 0.199E-01 0.950E-01 0.911E-02 0.967E-01 0.751E-02 S II 3d 4p 5000. 0.839 0.466E-01 0.394E-01 0.297E-03 0.502E-01 0.297E-03 5660.0 A 10000. 0.654 0.317E-01 0.591E-01 0.660E-03 0.698E-01 0.652E-03 C= 0.84E+20 20000. 0.516 0.292E-01 0.739E-01 0.130E-02 0.799E-01 0.122E-02 30000. 0.457 0.192E-01 0.798E-01 0.176E-02 0.855E-01 0.162E-02 50000. 0.408 0.176E-01 0.867E-01 0.239E-02 0.916E-01 0.209E-02 100000. 0.366 0.159E-01 0.940E-01 0.329E-02 0.958E-01 0.271E-02 S II 4s 4p 5000. 1.07 -0.189 0.337E-01-0.866E-02 0.431E-01-0.799E-02 5428.64 A 10000. 0.808 -0.135 0.513E-01-0.156E-01 0.607E-01-0.133E-01 C= 0.77E+20 20000. 0.615 -0.103 0.656E-01-0.230E-01 0.701E-01-0.195E-01 30000. 0.549 -0.925E-01 0.713E-01-0.264E-01 0.752E-01-0.218E-01 50000. 0.496 -0.821E-01 0.784E-01-0.307E-01 0.815E-01-0.252E-01 100000. 0.454 -0.648E-01 0.867E-01-0.367E-01 0.863E-01-0.301E-01

THANK YOU!