Stellar Nucleosynthesis : Proceedings of the Third Workshop of the Advanced School of Astronomy of the Ettore Majorana Centre for Scientific Culture, Erice, Italy, May 11–21, 1983

x about a sequence of reVlew lectures, each followed by contributed talks and discussions. The opening session was devoted to reviewing the most recent results concerning the determination of chemical abundances in particularly inte­ resting objects providing direct evidence for stellar nucleosynthesis (like planetary nebulae, supernovae and supernova remnants). In Session 2 recent results on some relevant nuclear reaction rates have been presented. Session 3 grouped the contributions concerning the quasi-static evolution of normal stars, its relevance for the nucleosynthesis of the varlOUS elements and isotopes, and the comparison of the evolutionary models with the observations. Session 4 addressed the important questions of identifying the precursors of both Type I and Type II supernovae, and of determining the detailed composition of the ejecta by explosive nucleosynthesis associated with these events. Finally, Session 5 was devoted to a presentation of recent calculations of the evolution of hypothetical pre-galactic very massive objects (in­ cluding their potential role in pre-galactic nucleosynthesis), and to reviewing the progress that has been made in understanding the chemical evolution of galaxies. The discussion during and after talks was spirited and contributed signi­ ficantly to the succes of the workshop. We regrett for not having been able of reporting it "in toto" in the proceedings. Nevertheless, we hope that what has been recorded may still give to the reader at least part of the excitement we have experienced during the ten days of the workshop. Front Matter....Pages i-xiv Front Matter....Pages 1-1 Nucleosynthesis and Planetary Nebulae....Pages 3-14 Cn 1-1 (= HD 330036): Planetary Nebula or Symbiotic Star?....Pages 15-18 Extragalactic Supernovae....Pages 19-33 Abundances in Supernova Remnants....Pages 35-42 The Nickel and Iron Abundances in the Crab Nebula Filaments....Pages 43-47 A Statistical Comparison of Galactic SNRs and Galactic Giant HII Regions....Pages 49-54 Wolf — Rayet Stars, Cosmic Rays and Gamma Rays....Pages 55-75 Front Matter....Pages 77-77 The Ne-Na Cycle and the 12 C+α Reaction....Pages 79-89 Nuclear Effective Forces and their Use in Astrophysical Problems....Pages 91-95 Front Matter....Pages 97-97 Some Aspects of the Nucleosynthesis in Intermediate Mass Stars....Pages 99-114 Hydrostatic Evolution and Nucleosynthesis in Massive Stars....Pages 115-136 Nucleosynthesis During the Quasi-Static Evolution of Massive Stars....Pages 137-144 Presupernova Yields and Their Dependence on the 12 C(α,γ) 16 O Reaction....Pages 145-150 r-Process Production in Low Mass Stars....Pages 151-159 Synthetic H-R Diagrams as an Observational Test of Stellar Evolution Theory....Pages 161-167 Evidence for a Large Main Sequence Widening: A Plea for Overshooting and Higher Heavy-Element Opacity....Pages 169-174 On the Structure of the Upper HRD of Humphreys....Pages 175-178 Front Matter....Pages 179-179 An Essay on Possible Precursors of Type I Supernovae....Pages 181-204 Nucleosynthesis in Type I Supernovae: Carbon Deflagration and Helium Detonation Models....Pages 205-237 TYPE II Supernovae from 8–10 M⊙ Progenitors....Pages 239-250 Front Matter....Pages 179-179 The Energetics of Type II Supernovae....Pages 251-261 Nucleosynthesis in Stellar Explosions....Pages 263-293 Front Matter....Pages 295-295 Massive Objects and the First Stars....Pages 297-317 Stellar He Production in a Cold Universe?....Pages 319-324 Chemical Abundances and Galaxy Evolution....Pages 325-340 Three Problems in the Chemical Evolution of Galaxies....Pages 341-358 Problems in the Chemical Evolution of Galaxies....Pages 359-381 The Chemical Evolution of Spiral Galaxies: The Galaxy, M31, M33, M83, and M101....Pages 383-388 Actinide R-Process Chronometers and β-Delayed Fission....Pages 389-396 Back Matter....Pages 397-397 Proceedings of the Third Workshop of the Advanced School of Astronomy of the Ettore Majorana Centre for Scientific Culture, Erice, Italy, May 11-21, 1983