Spectrum analysis of five A-F giant stars

Details Spectrum analysis of five A-F giant stars Spectrum analysis of five A-F giant stars

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227..156b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 1, Jan. 1990, p. 156-170. Research supported by SNSF.

Astronomy and Astrophysics

Astrophysics

20

A Stars, F Stars, Giant Stars, Spectrum Analysis, Stellar Evolution, Stellar Spectrophotometry, Abundance, Calcium, Hertzsprung-Russell Diagram, Scandium, Stellar Atmospheres, Stellar Temperature

Scientific paper

A spectrum analysis has been performed on five A-F giant stars which show a blanketing parameter Delta m(2) similar to that of Am stars (Delta m/2/ not less than 0.015) but without having been considered as Am stars by the spectrocopists. It is shown that these stars resemble more Delta Del stars than Am stars because the typical abundance anomalies of the main sequence classical Am stars (Sc and Ca underabundant, elements of Fe group normal or overabundant, and elements heavier than Fe strongly overabundant) was not found. Moreover, the possibility of a link between these A-F and the Am stars and the Delta Del stars is pointed out. The fact that the enhanced Delta m(2) of these A-F giant stars can be interpreted in terms of Fe/H, as suggested by Hauck (1986) is confirmed.

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