Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998arep...42..508s&link_type=abstract
Astronomy Reports, Volume 42, Issue 4, July 1998, pp.508-516
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Based on new spectroscopic observational data (high-resolution CCD spectrograms obtained with the coude spectrograph of the 2.6-m telescope), we perform a model-atmosphere analysis of six A stars in the Pleiades cluster which are classified as metallic-line stars. We determine the atmospheric parameters of these stars and estimate their masses, radii, and luminosities from a comparison with evolutionary calculations. Acomparison of the observed and synthetic spectra has yielded the atmospheric abundances of O, Si, Ca, Fe, and Ba in the stars. Using the currently available oscillator strengths, we determine the iron abundance in the atmospheres of the stars by the model-atmosphere method from published measurements of line equivalent widths. These results and the results of our previous abundance analysis of Coma stars lend support to the conclusion that the differences in the atmospheric abundances of chemically peculiar stars in the same cluster are real.
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