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Mean Chemical Abundance of the F Stars as a Function of Distance from the Galactic Plane

Published online by Cambridge University Press:  30 March 2016

A. Blaauw
A. Blaauw*
Affiliation:
Leiden Observatory

Extract

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At the Tbilisi European Regional Meeting 1975, I reported on results of uvby, Hß photometry of F-type stars in the north and south galactic polar caps (Blaauw and Garmany, 1976), based on stars in the McCormick proper motion fields between latitudes 60° and the poles. A relation was shown to exist between the quantity Am. as determined in this photometric system, and the distance, z, from the galactic plane; Δm1. being a measure of the metal abundance in these stars. The spectral range we deal with is defined by b-y = 0.25 to 0.40, corresponding with F0 to G2. It was found that, from the solar neighbourhood near z = 0, to z = 700 pc, the mean relative metal abundance M/H decreases by a factor of about one third.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 4 , Issue 2: Highlights of Astronomy. As presented at the XVIth General Assembly of the IAU, 1976 (Part II) , 1977 , pp. 51 - 52
Copyright
Copyright © Reidel 1977

References

Blaauw, A. and Garmany, C. D.: 1976, in E.K., Kharadze (ed), Proceedings of the Third European Astronomical Meeting, Tbilisi, 1 - 5 July 1975, p. 351.Google Scholar
Mayor, M.: 1976, Astron. Astrophysics 48, 301.Google Scholar
Oort, J. H.: 1965, in A., Blaauw and M., Schmidt (ed), Galactic Structure, The University of Chicago Press, Chicago, London, Ch.21.Google Scholar