On the lithium abundance determination in the atmospheres of super-Li-RICH CARBON stars using the resonance and subordinate Li I lines. I

Details On the lithium abundance determination in the atmospheres of super-Li-RICH CARBON stars using the resonance and subordinate Li I lines. I On the lithium abundance determination in the atmospheres of super-Li-RICH CARBON stars using the resonance and subordinate Li I lines. I

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001kfnt...17..446y&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 17, no. 5, p. 446-458

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Scientific paper

Seven Li I lines in the optical and near IR region are considered as lithium abundance indicators in the atmospheres of super-Li-rich cool carbon stars. The resonance Li I line lambda 670.8 nm is extremely sensitive to the lithium abundance at logN(Li) = 4.0...5.0 due to the sensitivity to logN(Li) of the line wings mainly. This requires a high accuracy of their calculations. The subordinate Li I lines lambda 610.4 and lambda 812.6 ­¬ are saturated and show a rather weak dependence on logN(Li) in the range 4.0...5.0. Weaker subordinate Li I lines lambdalambda 497.2, 460.3, 427.3, and 413.3 nm can be potentially good lithium abundance indicators at logN(Li) = 4.0...5.0. However, only the line Li I lambda 497.2 nm can be used for lithium abundance determinations in stars with normal metallicities because of strong blending of three other lines and a "violet depression" in the spectra of the majority of carbon giants.

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