Citation
Alonso Medina, Aurelia and Colón Hernández, Cristóbal and Montero de Juan, José Luis and Nation, Leah
(2010).
Stark broadening of Pb IV spectral lines of astrophysical interest.
"Monthly Notices of the Royal Astronomical Society", v. 401
(n. 2);
pp. 1080-1090.
ISSN 0035-8711.
https://doi.org/10.1111/j.1365-2966.2009.15698.x.
Abstract
Using a semi-empirical approach, we report in this paper calculated values of the Stark broadening parameters for 58 lines of Pb IV. They were calculated using a set of wavefunctions obtained from Hartree–Fock relativistic calculations including core polarization effects. Stark widths for 58 lines of Pb IV arising from 5d¹⁰ns (n=7,8), 5d¹⁰6p, 5d⁹6s6p, 5d¹⁰nd (n=6,7), 5d¹⁰5g and 5d¹⁰nh (n=6,7) configurations have been calculated in this way. Stark widths and shifts are presented for an electron density of 10¹⁷ cmˉ³ and temperatures T=11 000–200 000 K. These atomic data are relevant to the analysis of Pb IV detected in Far Ultraviolet Spectroscopic Explorer spectra of hot subdwarf B stars and are used to determine the lead abundance of the early B main-sequence star AV 304 in the Small Magallanic Cloud by measuring the 1313.1 Å resonance line. Common trends for the Stark width of the resonance lines have been found and are discussed.