Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..149s&link_type=abstract
In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J
Astronomy and Astrophysics
Astronomy
Globular Clusters, Element Abundances
Scientific paper
A fairly large fraction of Galactic globular clusters have been subjected to some sort of high spectral resolution abundance analysis in the past two decades. Several clusters have enjoyed the scrutiny of large numbers (>20) of their giant stars at very high resolution (R > 40000) and signal-to-noise (>100) and such investigations have even begun to probe the fainter subgiant cluster members. Other clusters have seemed to be of lesser interest having only studies of a few of their brighter members reported in the literature. This review will consider the abundance trends of some key element groups including the alpha Fe-peak neutron-capture and proton-capture elements. Some comparison with field stars will be attempted to illustrate where stellar population differences between clusters and the field seem to occur. Suggestions for renewed observational attention will be drawn to specific clusters whose chemical origin appears to be substantially different than the general Galactic halo.
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