The chemical evolution of populations in galaxies - Observations and explanations concerning galaxy models

Details The chemical evolution of populations in galaxies - Observations and explanations concerning galaxy models The chemical evolution of populations in galaxies - Observations and explanations concerning galaxy models

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977s%26w....16..321t&link_type=abstract

Sterne und Weltraum, vol. 16, Oct. 1977, p. 321-325. In German.

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Abundance, Astronomical Models, Galactic Evolution, Interstellar Chemistry, Stellar Systems, Chronology, Heavy Elements, Milky Way Galaxy, Stellar Evolution

Scientific paper

The essential processes in the evolution of a galaxy involve stars and interstellar material. Stars are formed in connection with the compression of interstellar material. The material contained in the stars is partly released again in a later stage of stellar evolution. Material escaping from stars is enriched with respect to heavy elements. After mixing with the environmental gas, this material can provide a basis for the formation of new stars with higher metal content. The chemical evolution of galaxies is related to the dissolution and reforming processes involving stellar objects. The abundance distribution of the elements in different populations is considered, taking into account the distribution in the solar system, in the vicinity of the sun, and in the Galaxy and other stellar systems. In connection with a discussion of galaxy models, attention is given to the stellar formation rate, the ultimate stages of stellar development and the production of heavy elements, and questions of system definition.

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