Atomic Physics with the Goddard High-Resolution Spectrograph on the Hubble Space Telescope. I. Oscillator Strengths for Neutral Sulfur

Astronomy and Astrophysics – Astronomy

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Atomic Data, Ism: Abundances, Stars: Individual Constellation Name: Zeta Ophiuchi

Scientific paper

Interstellar spectra toward ζ Oph acquired with the Goddard High-Resolution Spectrograph were used to obtain oscillator strengths for approximately two dozen S I lines. This analysis was possible because precisely determined experimental oscillator strengths are available for several multiplets, including one with a weak interstellar line. The self-consistent set of oscillator strengths then was obtained from a curve of growth based on line strengths spanning a range of a factor of 100. The derived f-values for a number of multiplets differ from values quoted by Morton (1991) but are generally consistent with the suite of available experimental and theoretical results.

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