R Coronae Borealis Star Evolution: Simulating 3D Merger Events to 1D Stellar Evolution Including Large-scale Nucleosynthesis [PDF]
Astrophysical Journal, 2021 R Coronae Borealis (RCB) stars are rare hydrogen-deficient carbon-rich variable supergiants thought to be the result of dynamically unstable white dwarf mergers.
Bradley Munson +6 more
semanticscholar +1 more source
Chemical Analysis of the Ultrafaint Dwarf Galaxy Grus II. Signature of High-mass Stellar Nucleosynthesis [PDF]
Astrophysical Journal, 2020 We present a detailed abundance analysis of the three brightest member stars at the top of the giant branch of the ultrafaint dwarf (UFD) galaxy Grus II.
T. Hansen +61 more
semanticscholar +1 more source
Turbulence and nuclear reactions in 3D hydrodynamics simulations of massive stars [PDF]
EPJ Web of Conferences, 2023 Our knowledge of massive star evolution and nucleosynthesis is limited by uncertainties related to multi-dimensional processes taking place in stellar interiors.
Rizzuti Federico +5 more
doaj +1 more source
The impact of n_TOF data on s-process modelling [PDF]
EPJ Web of Conferences, 2023 We show examples of the impact of the Maxwellian averaged capture cross sections determined at n_TOF over the past 20 years on AGB stellar nucleosynthesis models.
Lanzi Samuele +5 more
doaj +1 more source
Analysis of the impact of the 204Tl neutron capture cross section on the s-process only isotope 204Pb [PDF]
EPJ Web of Conferences, 2022 In the study of the slow (s) process of nucleosynthesis branching nuclei become of particular interest. These nuclei have half-lives of the order of 1-100 years, and in the stellar environment their decay rate can compete with the neutron capture rate ...
Casanovas-Hoste Adrià +5 more
doaj +1 more source
Universe, 2022 The foundations of stellar nucleosynthesis have been established more than 70 years ago. Since then, much progress has been made, both on the theoretical side, with stellar evolution and nucleosynthesis models of increasing complexity, using more and ...
Sophie Van Eck +2 more
doaj +1 more source
Impact of AGB Stars on the Chemical Evolution of Neutron-Capture Elements
Universe, 2022 In this review, we discuss the impact of s-process nucleosynthesis in asymptotic giant branch stars on the enrichment of heavy elements. We review the main steps made on this subject in the last 40 years and discuss the importance of modelling the ...
Gabriele Cescutti, Francesca Matteucci
doaj +1 more source
Underground measurement at LUNA found no evidence for a low-energy resonance in the 6Li(p, γ)7Be reaction [PDF]
EPJ Web of Conferences, 2022 The 6Li(p,γ)7Be reaction is involved in all three main nucleosynthesis scenarios: Big Bang Nucleosynthesis, the interaction of cosmic rays with interstellar matter, and stellar nucleosynthesis.
Piatti Denise
doaj +1 more source
NuGrid stellar data set – III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z= 0.01, Z = 0.02, and Z = 0.03 [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The production of the neutron-capture isotopes beyond iron that we observe today in the Solar system is the result of the combined contribution of the r-process, the s-process, and possibly the i-process. Low-mass asymptotic giant branch (AGB) (1.5 < M/
U. Battino +8 more
semanticscholar +1 more source
Hydrogen Tunneling in Stoichiometric and Catalytic Reactions involving Transition Metals
ChemCatChem, Volume 15, Issue 24, December 19, 2023., 2023 An overview on the importance of the participation of hydrogen tunneling in E−H bond activation reactions (E=C, O, Si…) mediated by transition metals is presented. Understanding when hydrogen tunneling occurs can be a powerful tool for designing new catalysts to perform challenging reactions.
Jon M. Matxain, Miguel A. Huertos
wiley +1 more source