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Browsing by Author "Cescutti, Gabriele"
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Abundances of carbon-enhanced metal-poor stars as constraints on their formation
Hansen, C.J.; Nordström, B.; Hansen, T.T.; Kennedy, C.R.; Placco, V.M.; Beers, T.C.; Andersen, J.; Cescutti, Gabriele; Chiappini, Cristina (2016-04-01)Context. An increasing fraction of carbon-enhanced metal-poor (CEMP) stars is found as their iron abundance, [Fe/H], decreases below [Fe/H] =−2.0. The CEMP-s stars have the highest absolute carbon abundances, [C/H], and ... -
The s-Process Nucleosynthesis in Low Mass Stars : Impact of the Uncertainties in the Nuclear Physics Determined by Monte Carlo Variations
Cescutti, Gabriele; Hirschi, Raphael; Nishimura, Nobuya; Rauscher, Thomas; den Hartogh, Jacqueline; Murphy, Alex St J.; Cristallo, Sergio (Springer Nature, 2019-08-20)We investigated the impact of uncertainties in neutron-capture and weak reactions (on heavy elements) on the s-process nucleosynthesis in low-mass stars using a Monte-Carlo based approach. We performed extensive nuclear ... -
Uncertainties in s-process nucleosynthesis in massive stars determined by Monte Carlo variations
Nishimura, Nobuya; Hirschi, Raphael; Rauscher, Thomas; Murphy, Alexander St J.; Cescutti, Gabriele (2017-08-01)The $s$-process in massive stars produces the weak component of the $s$-process (nuclei up to $A \sim 90$), in amounts that match solar abundances. For heavier isotopes, such as barium, production through neutron capture ... -
Uncertainties in the Production of p Nuclides in SN Ia Determined by Monte Carlo Variations
Rauscher, Thomas; Nishimura, Nobuya; Hirschi, Raphael; Murphy, Alex St J.; Cescutti, Gabriele; Travaglio, Claudia (Springer Nature, 2019-08-20)Several thousand tracers from a 2D model of a thermonuclear supernova were used in a Monte Carlo post-processing approach to determine p-nuclide abundance uncertainties originating from nuclear physics uncertainties in the ...