Investigation of the II-90 giant in globular cluster M 13

Details Investigation of the II-90 giant in globular cluster M 13 Investigation of the II-90 giant in globular cluster M 13

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287..881k&link_type=abstract

Astronomy and Astrophysics 287, 881-884 (1994)

Astronomy and Astrophysics

Astrophysics

4

Globular Cluster: M 13, Abundances, Evolution Of Stars, Stars: Population Ii

Scientific paper

A model-atmopshere analysis of the II-90 giant in the globular cluster M 13 is made on high-dispersion spectra taken with the echelle-spectrometer at the 6-m telescope of the Special Astrophysical Observatory. The abundances of 23 chemical elements are determined. The excess of sodium, aluminium, silicon and titanium is found relative to iron-peak elements. The overabundance of elements (La, Pr, Nd, Eu) synthesized mainly in reaction with high-density neutron flux is detected. The oxygen abundance is [O/Fe]=0.07. Estimates are made of the lithium abundance.

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