Results 61 to 70 of about 767 (211)
Missing Titanium in the Asymmetric Supernova Remnant W 49B
The Astrophysical JournalThe progenitor of the W 49B supernova remnant is still under debate. One of the candidates is a jet-driven core-collapse supernova. In such a highly asymmetric explosion, a strong α -rich freeze-out is expected in local high-entropy regions, which should
Toshiki Sato +4 more
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Chaos and turbulent nucleosynthesis prior to a supernova explosion [PDF]
AIP Advances, 2014 Three-dimensional (3D), time dependent numerical simulations of flow of matter in stars, now have sufficient resolution to be fully turbulent. The late stages of the evolution of massive stars, leading up to core collapse to a neutron star (or black hole), and often to supernova explosion and nucleosynthesis, are strongly convective because of vigorous
Arnett, W., Meakin, C., Viallet, M.
openaire +4 more sources
Massive stars: presupernova evolution and explosive nucleosynthesis
, 2020 . We review the current status of the research for the presupernova evolution of massive stars and their related explosive nucleosynthesis. We also discuss in detail some observational diagnostics for solar and zero metallicity massive star ...
M Limongi, A Chieffi
core
Type Ia Supernova Nucleosynthesis: Metallicity-dependent Yields
The Astrophysical Journal Supplement Series, 2023 Type Ia supernova explosions (SN Ia) are fundamental sources of elements for the chemical evolution of galaxies. They efficiently produce intermediate-mass (with Z between 11 and 20) and iron group elements—for example, about 70% of the solar iron is ...
James D. Keegans +9 more
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Nucleosynthesis in Core-Collapse Supernovae
, 2019 Core-collapse supernovae (CCSNe) are one of the most important nucleosynthesis sites and they hold a key role in the evolution of galaxies. In the explosion, CCSNe eject freshly synthesized iron-group nuclei from explosive burning alongside of ...
Liebendörfer, Matthias +11 more
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Extending the Dispersive Optical Model to β-unstable Systems [PDF]
EPJ Web of ConferencesPhenomenological optical-model potentials (OMPs) are a key ingredient for nuclear cross section libraries that enter astrophysical nucleosynthesis simulations. While existing OMPs can reliably reproduce direct reaction cross sections on β-stable targets,
Pruitt Cole D. +3 more
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The Astrophysical Journal, 2023 We present near-infrared (NIR) and optical observations of the Type Ic supernova (SN Ic) SN 2021krf obtained between days 13 and 259 at several ground-based telescopes.
Aravind P. Ravi +31 more
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The p-PROCESS in Explosive Nucleosynthesis
The Astrophysical Journal, 1972 The limiting conditions consistent with p-process synthesis in supernova envelopes are inferred from calculations of the appropriate rates of proton capture and neutron photodisintegration. Temperatures in excess of 2 x 10 to the 9th power K are required, for proton mass densities of the order of 100 g cm to the minus 3rd power, if significant ...
J. W. Truran, A. G. W. Cameron
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Physical Conditions for Synthesis of Sc, Ti, and V in Neutrino-driven Supernovae
The Astrophysical JournalWe present the results of simulations of nucleosynthesis in a core-collapse supernova including the neutrino process. Using the Si layer of a 13 M _⊙ zero-metal progenitor as the initial composition, we calculate the nucleosynthesis by adopting the ...
Ryota Hatami +4 more
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Explodability matters: How neutrino-driven explosions change explosive nucleosynthesis yields
Astronomy & AstrophysicsExplosive nucleosynthesis is affected by many uncertainties, particularly regarding the assumptions and prescriptions adopted during a star’s evolution.
Boccioli L., Roberti L.
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