The Galactic Abundance Gradient

Details The Galactic Abundance Gradient The Galactic Abundance Gradient

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..27...19s&link_type=abstract

The Messenger, No.27, P. 19, 1982

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Scientific paper

The study of chemical abundances and their variation from one galaxy to another or within individual galaxies is of fundamental importance for our understanding of the evolution of galaxies. The abundances of heavy elements in the interstellar medium provide a fossil record of the enrichment which has taken place due to nucleosynthesis in successive generations of stars. Gradients of heavy element abundances with distance from the galactic centre are predicted by models in which the rate of star formation varies across the galactic disk, and by dynamical collapse models of galactic evolution which involve fresh infall of primordial gas onto the disk over long periods of time. Different models predict different abundance gradients (in slope and shape). and abundance measurements give constraints on these models (see Pagel and Edmunds, 1981, Ann. Rev. Astron. Astrophys. 19, 77, for arecent review).

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