The Chemical Composition of Stars in the Globular Clusters M 10, M 12, and M 71

Details The Chemical Composition of Stars in the Globular Clusters M 10, M 12, and M 71 The Chemical Composition of Stars in the Globular Clusters M 10, M 12, and M 71

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003arep...47..248m&link_type=abstract

Astronomy Reports, vol. 47, Issue 3, p.248-253

Astronomy and Astrophysics

Astronomy

7

Scientific paper

The abundances of 19 chemical elements in the atmospheres of five stars belonging to three globular clusters have been determined by applying the model-atmospheremethod to 430.0 790.0 nm spectra obtained with the échelle spectrometer of the 6-m telescope of the Special Astrophysical Observatory. The abundances of silicon, calcium, iron-peak elements, copper, zinc, and neutron-capture elements follow the abundance patterns for halo stars. The abundance of sodium in M 10 giants provides evidence that different mixing mechanisms operate in halo and cluster stars or that light elements are enriched in different ways in the pre-stellar matter from which some globular clusters and halo stars were formed.

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