High resolution analysis of a star in the young SMC globular cluster NGC 330

Details High resolution analysis of a star in the young SMC globular cluster NGC 330 High resolution analysis of a star in the young SMC globular cluster NGC 330

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...168..197s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 168, no. 1-2, Nov. 1986, p. 197-203. CNRS-supported research.

Astronomy and Astrophysics

Astrophysics

45

Abundance, Globular Clusters, Magellanic Clouds, Spectrum Analysis, Stellar Evolution, Supergiant Stars, H Ii Regions, High Resolution, Metallicity, Milky Way Galaxy, Stellar Mass Ejection, Stellar Spectrophotometry

Scientific paper

The analysis of CASPEC spectra of the supergiant star A7 in the young cluster NGC 330 (Small Magellanic Cloud) shows that the star has a metellacity much smaller than the metallicity of the few field supergiants of the SMC which have been analyzed. The metallicity of the star is similar to that found in typical globular clusters of the Galaxy, but does not deviate significantly from that of some H II regions of the SMC. The distribution of the individual abundances of the elements is definitely nonsolar, and is similar to the distribution found in the typical globular clusters of the Galaxy. The abundances of heavy elements (rare earths) and in particular of Europium, is enhanced relative to the typical globular clusters of the Galaxy; such anomaly is known in two halo field giants of the Galaxy, HD 115444 and DH 110184. The resonance line of lithium is observable, and hence the star suffered only a small mass loss.

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