Another lithium-rich K giant - HD 30238

Details Another lithium-rich K giant - HD 30238 Another lithium-rich K giant - HD 30238

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1225p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, April 1990, p. 1225-1231.

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30

K Stars, Lithium, Metallicity, Red Giant Stars, Abundance, Chromosphere, Stellar Evolution, Stellar Spectra

Scientific paper

The K giant HD 30238 is reported to show a strong feature due to Li I 6707 A, corresponding to a lithium abundance of log epsilon(Li) = 1.2 + or - 0.05. This star appears to be another example of a rare class of otherwise normal, low-mass K giants with unusually high lithium abundances. The C-12/C-13 isotope ratio in HD 30238 is approximately 26 + or - 4; this low value suggests that the star has developed a normal K giant convective envelope. The observed abundance of lithium in the spectrum of the star may be inconsistent with this low carbon isotope ratio. The abundance of lithium in low-mass stars on the red giant branch as a function of effective temperature suggests that lithium continues to be depleted from the convective envelope during evolution up the red giant branch.

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