Red giants in the vicinity of open clusters. Field stars

Details Red giants in the vicinity of open clusters. Field stars Red giants in the vicinity of open clusters. Field stars

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53..685p&link_type=abstract

Astronomy Reports, Volume 53, Issue 8, pp.685-702

Astronomy and Astrophysics

Astronomy

2

95.10.Eg, 95.85.Kr, 97.10.Cv, 97.10.Ex, 97.10.Nf, 97.10.Ri, 97.10.Tk, 97.10.Vm, 97.10.Wn, 97.20.Li, 98.35.Pr

Scientific paper

We present a comparative analysis of the atmospheric abundances of red giants in the vicinity of open clusters. The atmospheric parameters, atmospheric abundances, masses, ages, Galactic velocities, and elements of the Galactic orbits are derived for all the studied stars. We have discovered high metal abundances (close to 0.3dex) for five stars, which we classify as super-metal-rich stars. Several stars have lower [Na/Fe] than normal red giants with similar atmospheric parameters. The kinematic characteristics of these stars are somewhat different from those for objects in the Galactic thin disk. We suggest that the observed effect can be explained by inhomogeneity of the chemical composition of gas-dust clouds, which could be due to different rates of SNe II supernovae in different regions of the Galaxy.

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