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NLTE Effects on Oxygen Lines
Published online by Cambridge University Press: 30 March 2016
Abstract
The NLTE effects affecting oxygen-abundance determinations of solar-type stars are discussed. LTE is safe for the forbidden lines. The permitted triplet at 777 nm is expected to show NLTE effects so that assuming LTE overestimates the abundance, but the magnitude of the effects is dependent on the poorly known cross sections of collisional excitation by collisions with neutral hydrogen atoms. Little is known about the NLTE effects on molecular line formation.
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- II. Joint Discussions
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- Copyright © Astronomical Society of Pacific 2002
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