The atmospheric abundances of the giant AM star 22 Bootis

Details The atmospheric abundances of the giant AM star 22 Bootis The atmospheric abundances of the giant AM star 22 Bootis

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....92..132b&link_type=abstract

Astronomy and Astrophysics, vol. 92, no. 1-2, Dec. 1980, p. 132-138.

Astronomy and Astrophysics

Astrophysics

7

A Stars, Abundance, Giant Stars, Stellar Atmospheres, Heavy Elements, Metallic Stars, Stellar Gravitation, Stellar Temperature

Scientific paper

A fine abundance analysis of 22 Bootis relative to 15 Vulpeculae is presented. It is shown that an evolved Am star has the characteristic abundance anomalies of the Am stars: Sc and Ca are underabundant, the group (Ti, V, Cr, Mn, Fe) is almost normal, the elements heavier than Fe are overabundant. It is found that the Sc and Ca anomalies do not decrease with advancing evolution, the group (Ti, V, Cr, Mn, Fe) is not enhanced, and the heavier elements have reduced overabundances with the exception of Zr whose overabundance becomes higher. A discrepancy between the high metallic index m1 and the normal abundance of Fe is found.

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