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Metallicity Structures of the Milky Way

Published online by Cambridge University Press:  25 May 2016

Roland Buser  and
Jianxiang Rong
Roland Buser
Affiliation:
Astronomical Institute, University of Basel, Switzerland
Jianxiang Rong
Affiliation:
Astronomy Department, Nanjing University, China

Abstract

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The metallicity-sensitive (U – G) colors from the new homogeneous catalog of photographic RGU data in seven high-latitude fields have been used to determine the larger-scale metallicity distributions of the Galactic population components. For the thick disk, preliminary analysis based on our best structural models provides a mean metallicity 〈[M/H]〉 = −0.6 ± 0.3dex and a marginal vertical metallicity gradient ≈ −0.1dex/kpc. The observed color distributions are further consistent with the (old) thin disk having mean abundance 〈[M/H]〉 = −0.3 ± 0.2dex and abundance gradient ∂[M/H]/∂z = −0.6dex/kpc.

Type
Chapter 5: How Did the Milky Way Form?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 427 - 428
Copyright
Copyright © Kluwer 1996 

References

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