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Chemical evolution of the galactic interstellar medium: abundance gradients

Published online by Cambridge University Press:  14 August 2015

Manuel Peimbert
Manuel Peimbert*
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México

Abstract

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Recent abundance determinations of galactic H II regions and planetary nebulae are reviewed. The presence of O/H and N/H abundance gradients is well established; there is observational evidence indicating the presence of N/S, He/H and C/H abundance gradients. Some implications of these results are discussed.

Type
V. PHYSICAL PROPERTIES OF THE INTERSTELLAR MEDIUM
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 307 - 316
Copyright
Copyright © Reidel 1979 

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