Detailed analysis of the Delta Del star HD 115604 = 20 CVn

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Abundance, Stellar Atmospheres, Stellar Composition, A Stars, Atmospheric Composition, Iron, Metallicity, Stellar Spectra

Scientific paper

Abundance analysis results of the δ Del star 20 CVn are reported. The following atmospheric parameters are derived: θeff = 0.70, log g = 3.0, [Fe/H]_sun;20 CVn = +0.48, ξ = 0.9 km s-1. The high iron abundance fits the large value of Δm2, the blanketing parameter in the Geneva photometric system. This result tends to confirm that it is possible to use Δm2 to study the metallicity in the atmosphere of δ Del stars.

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