Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.296.1057b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 296, Issue 4, pp. 1057-1060.
Astronomy and Astrophysics
Astronomy
86
Atomic Data, Sun: Abundances
Scientific paper
The theory of Anstee & O'Mara for the broadening of spectral lines owing to collisions by neutral hydrogen atoms is extended to d-f and f-d transitions of neutral atoms. Width cross-sections are tabulated against effective principal quantum numbers for the upper and lower states of the transition, for a relative collision velocity of 10^4ms^-1. The cross-sections are fitted to a variation with velocity of v^-alpha, and results for the velocity parameter alpha are similarly tabulated. The data are tested by application to d-f spectral lines in the solar spectrum. The derived abundances are consistent with those for meteorites.
Barklem Paul S.
O'Mara B. J.
Ross John E.
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