Cosmic Radioactivity and Galactic Chemical Evolution
Roland Diehl, Nikos Prantzos

TL;DR
This paper reviews the modeling of galactic chemical evolution, emphasizing the role of radioactive isotopes in constraining astrophysical processes and tracing the history of cosmic matter.
Contribution
It highlights how radioactive isotopes enhance models of galactic chemical evolution, providing new insights into star formation and interstellar transport processes.
Findings
Distribution of 26Al and 60Fe across the galaxy
Radioactive components in cosmic rays
Terrestrial deposits of 60Fe and 244Pu
Abstract
The description of the tempo-spatial evolution of the composition of cosmic gas on galactic scales is called 'modelling galactic chemical evolution'. It aims to use knowledge about sources of nucleosynthesis and how they change the composition of interstellar gas, following the formation of stars and the ejection of products from nuclear fusion during their evolution and terminating explosions. Sources of nucleosynthesis are diverse: Stars with hydrostatic nuclear burning eject some of the products, and core-collapse supernovae add ejecta. Binary interactions lead to sources such as thermonuclear supernovae and kilonovae. Tracing ejecta from sources, with their different frequencies and environments, through the interstellar medium and successive star formation cycles is the goal of model descriptions. A variety of formalisms exist, from analytical through semi-analytical, numerical…
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Taxonomy
TopicsAstro and Planetary Science · Gamma-ray bursts and supernovae · Astronomical and nuclear sciences
