SIMBAD references

2014MNRAS.437.2106A - Mon. Not. R. Astron. Soc., 437, 2106-2110 (2014/January-3)

Barium in Cepheids: new data on the abundance distribution in the Galactic disc.


Abstract (from CDS):

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 18kpc shows very small gradient value. The value determined here - d[Ba/H]/dR ~ -0.01dex/kpc - is smaller than that for other s-process elements, such as La, Pr, Nd and Sm (Luck & Lambert), that typically show gradients of -0.03dex/kpc.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: abundances - stars: variables: Cepheids - Galaxy: disc - Galaxy: evolution

VizieR on-line data: <Available at CDS (J/MNRAS/437/2106): table1.dat>

Simbad objects: 214

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