Detailed analysis of high velocity stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Atmospheric Models, Chemical Composition, Giant Stars, Stellar Spectra, Abundance, Magnesium, Nuclear Fusion, Sodium

Scientific paper

Four high velocity southern stars and one Population I giant are analyzed in detail, using model atmospheres. In spite of their kinematical properties typical of Population II, the four high velocity stars are found moderately metal-deficient. Sodium is found overabundant in the Population I giant. The overabundance of magnesium in HD 41312 is discussed in terms of the nucleosynthesis theory of Arnett.

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