Atomic data for absorption lines from the ground level at wavelengths greater than 228A.

Astronomy and Astrophysics – Astrophysics

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Atomic Data, Quasars: Absorption Lines, Ultraviolet: General

Scientific paper

We list wavelengths, statistical weigths and oscillator strengths for 2249 spectral lines arising from the ground states of atoms and ions. The compilation covers all wavelengths longward of the He II Lyman limit at 227.838A and all the ion states of all elements from hydrogen to bismuth (Z=83) for which reliable data are known. We assign experimental wavelengths to 1086 lines which have oscillator strengths calculated in the Opacity Project, and add 1163 lines which have critically evaluated oscillator strengths from previous compilations. The presented data are to be used for quasar absorption spectra interpretation. We use solar abundances to calculate the expected relative strengths of all absorption lines, and list separately the strongest lines above 228A expected in QSO absorption systems, many of which are listed here for the first time. The great majority of strong lines expected in quasar spectra are at λ<912A. We also list the strongest absorption lines of various ions without wavelength restriction.

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