Journal Article

Stark broadening of Pb <span class="smallCaps">iv</span> spectral lines of astrophysical interest

A. Alonso-Medina, C. Colón, J. L. Montero and L. Nation

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 401, issue 2, pages 1080-1090
Published in print January 2010 | ISSN: 0035-8711
Published online January 2010 | e-ISSN: 1365-2966 | DOI: https://dx.doi.org/10.1111/j.1365-2966.2009.15698.x
Stark broadening of Pb iv spectral lines of astrophysical interest

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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 cm−3and 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.

Keywords: atomic data; atomic processes

Journal Article.  1929 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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