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Globular Clusters and Primordial Composition

Published online by Cambridge University Press:  19 July 2016

Roger Cayrel
Roger Cayrel*
Affiliation:
Observatory of Paris

Extract

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So much has been learned already, during these last four days, about globulars that I shall start by addressing the second part of my topic first: the primordial chemical composition. Then I shall review the abundance of the primordial elements in globulars, or more generally in Population II. Actually if the globulars are the oldest stars ever observed in the Universe one could hope that the subject is over and that there is no need to speak about elements synthesized in stellar interiors for globulars. Unfortunately these rascals show always some amount of stellar nucleosynthesis products and this may very well be the central problem raised by their chemical composition. We shall discuss in turn the amount of the stellar synthesized elements in globulars and then the clues given by the pecularities of the abundance ratios, which may help in understanding their origin. The last section summarized the present knowledge of the subject.

Type
Chapter V. Review Papers on Globular Clusters as Tracers and HST
Information
Symposium - International Astronomical Union , Volume 126: The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies , 1988 , pp. 431 - 442
Copyright
Copyright © Kluwer 1988 

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