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Chemical Composition Variations in the Galaxy

Published online by Cambridge University Press:  07 August 2017

Ju. L. Frantsman
Ju. L. Frantsman*
Affiliation:
Radioastrophysical observatory Latvian Academy of Sciences Turgeneva 19, 226524, Riga, Latvia

Abstract

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Comparing the data about the Cepheid periods and the star evolution calculations, the conclusion is made that inside 5 kpc distance from the Sun heavy element abundance Z changes between 0-01 and 0.04.

Type
Chemistry of Interface Regions
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 327 - 328
Copyright
Copyright © Kluwer 1992 

References

REFERENCES

1. Becker, S.A., Iben, I. Jr., Tuggle, R.S. (1977) ‘On the frequency-period distributions of Cepheid variables in galaxies in the local group’, Ap. J., 218, 633.CrossRefGoogle Scholar
2. Harris, H.C. (1981) ‘Photometric abundances of classical cepheids and the gradient in the Galactic disk’, A. J., 86, 707.CrossRefGoogle Scholar