Lithium Abundances in the Atmospheres of SLR C-Giants WZ Cas and WX Cyg from Resonance and Subordinate Li I Lines |
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Authors: | Larisa A Yakovina Yakiv V Pavlenko Carlos Abia |
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Institution: | (1) Main Astronomical Observatory of NASU, Golosiiv Woods, Kyiv-127, 03680, Ukraine; E-mail;(2) Dpt. Física Teórica y del Cosmos, Universidad de Granada, 18071 Granada, Spain; E-mail |
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Abstract: | Lithium abundances in the atmospheres of the super Li-rich C-giants WZ Cas and WX Cyg are derived by the spectral synthesis
technique using the Li I resonance line at λ670.8 nm and three subordinate lines at λλ 812.6, 610.4 and 497.2 nm. The differences
between the Li abundances derived from the λ670.8 nm line and the λλ 497.2, 812.6 nm lines do not exceed ±0.5 dex. The lithium
line at λ610.4 nm provides typically lower abundances than the resonance line (by ≈ 1 dex). The mean LTE and NLTE Li abundances
from three Li I lines (excluding λ610.4 nm) are 4.7, 4.9 for WZ Cas, and 4.6, 4.8 for WX Cyg, respectively.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | Li I resonance and subordinate lines Stars: individual: WZ Cas WX Cyg Stars: AGB carbon J Stars: model atmospheres Li abundances |
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