Another lithium-rich K giant - HD 30238

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115411· OSTI ID:7041757

Pilachowski, C A; Hudek, D; Sneden, C ^[1]

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1. Kitt Peak National Observatory, Tucson, AZ (USA) Texas Univ., Austin (USA)

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. 31 refs.

• OSTI ID: 7041757
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALKALI METALS
ATMOSPHERES
CARBON ISOTOPES
CHEMICAL COMPOSITION
ELEMENT ABUNDANCE
ELEMENTS
GIANT STARS
ISOTOPE RATIO
ISOTOPES
LITHIUM
MASS
METALS
RED GIANT STARS
SPECTRA
STAR EVOLUTION
STARS
STELLAR ATMOSPHERES
STELLAR CHROMOSPHERES