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Evidence for Primordial Inhomogeneities From Abundance of Giants in M5, M13, and M22

Published online by Cambridge University Press:  14 August 2015

Ruth C. Peterson
Ruth C. Peterson*
Affiliation:
Lockheed Palo Alto Research Laboratory

Extract

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There is spectroscopic evidence for initial abundance inhomogeneities from star to star within M13 and M22. Among three stars in M13, there is an order-of-magnitude range in the sodium-to-iron ratio, which lies well beyond all known random and systematic errors; details will be given in a paper in preparation. In M22, the spread discussed below in logarithmic iron-to-hydrogen ratios, [Fe/H], is 0.6 dex, which is far larger than that found here for any other globular cluster.

Type
August 30 Globular Clusters
Information
Symposium - International Astronomical Union , Volume 85: Star Clusters , 1980 , pp. 461 - 464
Copyright
Copyright © Reidel 1980 

References

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Hesser, J.E., and Harris, G.L.H.: 1979, Astrophys. J. (December).Google Scholar
Kurucz, R.L.: 1970, Smithsonian Astrophys. Obs. Report, No. 309.Google Scholar