Broadening of lines of Be ii, Sr ii and Ba ii by collisions with hydrogen atoms and the solar abundance of strontium |
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| Authors: | P S Barklem B J O'Mara |
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| Institution: | Uppsala Astronomical Observatory, Box 515, S-751 20, Uppsala, Sweden; Department of Physics, University of Queensland, St. Lucia 4072, Australia |
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| Abstract: | In a previous paper by the present authors the theory of Anstee and O'Mara for the broadening of spectral lines of neutral atoms by collisions with hydrogen atoms was extended to singly ionized atoms. In this paper we apply the method to the resonance and triplet lines of ionized strontium, the infrared triplet of ionized barium, and the resonance lines of ionized beryllium. Analysis of five lines of ionized strontium, previously regarded as too strong for an abundance analysis, and two lines of neutral strontium results in a solar abundance of strontium of log( N Sr N H)+12=2.92±0.05, which is entirely consistent with the meteoritic value. |
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| Keywords: | atomic data line: profiles Sun: abundances |
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