Primordial and Stellar Nucleosynthesis Chemical Evolution of Galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Nucleosynthesis, White Dwarfs, Supernovae, Grand Unified Theory, Stellar Evolution, Big Bang Nucleosynthesis, Dwarf Galaxies, Supernovae, Unified Theories And Models Of Strong And Electroweak Interactions, Black Holes

Scientific paper

Following a brief introduction to early Universe cosmology, we present in some detail the results of primordial nucleosynthesis. Then we summarize the basic theory of nuclear reactions in stars and sketch the general rules of stellar evolution. We shortly review the subject of supernova explosions both by core collapse in massive stars (Type II) and carbon-deflagration in binary systems when one of the components is a White Dwarf accreting mass from the companion (Type Ia). We conclude the part dedicated to nucleosynthesis with elementary notions on the s- and r-process. Finally, we shortly address the topic of galactic chemical evolution and highlight some simple solutions aimed at understanding the main observational data on abundances and abundance ratios.

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