Chemical Evolution and Primordial Nucleosynthesis
نویسندگان
چکیده
منابع مشابه
Structure, Evolution and Nucleosynthesis of Primordial Stars
The evolution of population III stars (Z = 0) is followed from the pre-main sequence phase up to the AGB phase for intermediate-mass stars and up to C ignition in more massive stars. Our grid includes 11 stars, covering the mass range 0.8 to 20 M . During the H and He core burning phases an overshooting characterized by d = 0.20HP was applied and during the AGB phase a small extension of the co...
متن کاملPrimordial Nucleosynthesis
Primordial nucleosynthesis provides a probe of the Universe during its early evolution. Given the progress exploring the constituents, structure, and recent evolution of the Universe, it is timely to review the status of Big Bang Nucleosynthesis (BBN) and to confront its predictions, and the constraints which emerge from them, with those derived from independent observations of the Universe at ...
متن کاملNeutrinos and Primordial Nucleosynthesis
The importance of the Big Bang Nucleosynthesis (BBN) as a unique tool for studying neutrino properties is discussed, and the recent steps towards a self-consistent and robust handling of the weak reaction decoupling from the thermal bath as well as of the neutrino reheating following the e − e− annihilation are summarized. We also emphasize the important role of the Cosmic Microwave Background ...
متن کاملEvolution and Nucleosynthesis of Very Massive Primordial Stars
We investigate the evolution, final fate, and nucleosynthetic yields of rotating and non-rotating very massive stars (VMS) of zero metallicity. First we address the issue of mass loss during hydrogen burning due to vibrational instabilities. We find that these objects are much more stable than what was found in previous studies of VMS of solar composition, and expect only negligible mass loss d...
متن کاملBig-Bang Nucleosynthesis and Galactic Chemical Evolution
Deuterium is the best indicator of the baryon density; however, only its present abundance is known (and only locally) and its chemical evolution is intertwined with that of He. Because galactic abundances are spatially heterogeneous, mean chemical-evolution models are not well suited for extrapolating the pre-solar D and He abundances to their primeval values. We introduce a new approach which...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1988
ISSN: 0074-1809
DOI: 10.1017/s0074180900035762