Results 81 to 90 of about 53,561 (244)
Frontiers in Astronomy and Space Sciences, 2021 Theoretical prediction of surface stellar abundances of light elements–lithium, beryllium, and boron–represents one of the most interesting open problems in astrophysics.
E. Tognelli +14 more
doaj +1 more source
Evolution and Nucleosynthesis of Metal-Free Massive Stars [PDF]
, 1999 We calculate presupernova evolutions and supernova explosions of massive stars (M=13-25 Mo) for various metallicities. We find the following characteristic abundance patterns of nucleosynthesis in the metal-free (Pop III) stars.
Nakamura, Takayoshi +2 more
core +2 more sources
Cosmological consequences of a scalar field with oscillating equation of state. IV. Primordial nucleosynthesis and the deuterium problem [PDF]
, 2022 Shuxun Tian
openalex +1 more source
Pediatric Blood &Cancer, Volume 71, Issue 11, November 2024.Abstract An attractive flower from the island of Madagascar has in part saved the lives of thousands of children with acute lymphoblastic leukemia (ALL). Random mutations and alterations to the genome led to the evolution of genes encoding enzymes, which would provide the periwinkle flower an arsenal of secondary metabolites to survive within the ...
Jeffrey W. Taub +5 more
wiley +1 more source
Neutrinos and Primordial Nucleosynthesis
, 2004 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 ...
Cuoco +13 more
core +2 more sources
Three-body optical potentials in
, 2021 M. J. Dinmore +2 more
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No crisis for big bang nucleosynthesis [PDF]
Physical Review D, 1996 Contrary to a recent claim, the inferred primordial abundances of the light elements are quite consistent with the expectations from standard big bang nucleosynthesis when attention is restricted to direct observations rather than results from chemical evolution models.
Kernan, P, Sarkar, S
openaire +3 more sources
Supernova neutrinos and nucleosynthesis
, 2013 Observations of metal-poor stars indicate that at least two different nucleosynthesis sites contribute to the production of r-process elements.
Fischer, T. +2 more
core +1 more source
Geostandards and Geoanalytical Research, Volume 48, Issue 2, Page 331-343, June 2024.Key Points Corrected for the Earth's magnetic field, the SHRIMP's IMF depends on the mineral species, not the chemical composition. The IMF arises from the force constant difference between "hard" and "soft" bonds, which is characteristic of each mineral. This permitted the calculation of IMF‐correction factors for most common Mg‐bearing minerals.
Fernando Bea +7 more
wiley +1 more source
Carbon-enhanced metal-poor stars: a window on AGB nucleosynthesis and binary evolution. II. Statistical analysis of a sample of 67 CEMP-$s$ stars [PDF]
, 2015 Many observed CEMP stars are found in binary systems and show enhanced abundances of $s$-elements. The origin of the chemical abundances of these CEMP-$s$ stars is believed to be accretion in the past of enriched material from a primary star in the AGB ...
Abate, C. +3 more
core +2 more sources