After a brief introduction to stellar modeling, the main lines of massive star evolution are reviewed, with focus on nuclear reactions from which gets needed energy counterbalance its gravity. The different burning phases described, as well structural impact they have star. Some general effects uncertainties in reaction rates presented, more precise examples taken 12 C(α, γ) 16 O and sensitivit...

Neutrino-driven wind from young hot neutron star, which is formed by supernova explosion, is the most promising candidate site for r-process nucleosynthesis. We study general relativistic effects on this wind in Schwarzschild geometry in order to look for suitable conditions for a successful r-process nucleosynthesis. It is quantitatively discussed that the general relativistic effects play a s...

We demonstrate that nucleosynthesis in rapid, high-entropy expansions of proton-rich matter from high temperature and density can result in a wider variety of abundance patterns than heretofore appreciated. In particular, such expansions can produce iron-group nuclides, p-process nuclei, or even heavy, neutron-rich isotopes. Such diversity arises because the nucleosynthesis enters a little expl...

A general review of the relevance of classical novae for the chemical evolution of the Galaxy, as well as for Galactic radioactivity is presented. A special emphasis is put on the pioneering work done by Jim Truran in this field of research. The impact of recent developments in nuclear astrophysics on nova nucleosynthesis, together with the prospects for observability of novae radioactivities w...

Should U(1) long-range forces be associated to electron, muon and/or tau quantum number then their ”fine structure constants” are seen to be bound by nucleosynthesis data to be less than about 1.7× 10. For τ and μ this is the best upper limit up to date. ∗Laboratoire associé au C.N.R.S. — URA D0063. While the rôle of electric charge, weak isospin, and color is completely clarified in the modern...