Gradients of chemical composition in the galactic disk

Details Gradients of chemical composition in the galactic disk Gradients of chemical composition in the galactic disk

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mmsai..51..107c&link_type=abstract

(Workshop on Cosmic Abundances of the Elements, Livorno, Italy, Oct. 11, 1979.) Società Astronomica Italiana, Memorie, vol. 51,

Astronomy and Astrophysics

Astrophysics

3

Abundance, Chemical Composition, Chemical Evolution, Galactic Evolution, Interstellar Chemistry, Interstellar Matter, Astrophysics, Interstellar Gas

Scientific paper

A model for the chemical evolution of the solar neighborhood and galactic disk is proposed which takes into account the time scale of disk formation. The models of Chiosi (1977, 1979) are reconsidered, relaxing the instantaneous recycling approximation and describing the chemical composition of the gaseous component in greater detail. In this regard, a set of elements (H-1, H-2, He-3, He-4, (C-12) plus (O-16), N-14, neutron rich, and heavier elements) is used to describe the chemical composition of the galactic gas and inflowing material. The model confirms the results of Chiosi and predicts radial gradients of gas metal abundance, gas surface mass density, and rate of star formation that agree with the observations.

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