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Andrievsky, S. M; Luck, R. E; Korotin, S. A
Monthly notices of the Royal Astronomical Society, 01/2014, Letnik: 437, Številka: 3Journal Article
Using an Non-Local Thermodynamic Equilibrium (NLTE) analysis and a homogenous spectral data base, we have determined Ba abundances in a sample of 210 Galactic Cepheids and related objects. We confirm the previous result reported in Andrievsky et al. that the barium distribution in the range of Galactocentric distances from 5 to 18 kpc shows very small gradient value. The value determined here - dBa/H/dR −0.01 dex kpc−1 - is smaller than that for other s-process elements, such as La, Pr, Nd and Sm (Luck & Lambert), that typically show gradients of −0.03 dex kpc−1.
