Results 61 to 70 of about 112,099 (203)
Core-collapse Supernova Simulations with Reduced Nucleosynthesis Networks
The Astrophysical Journal, 2023 We present core-collapse supernova simulations including nuclear reaction networks that impact explosion dynamics and nucleosynthesis. The different composition treatment can lead to changes in the neutrino heating in the vicinity of the shock by ...
Gerard Navó +3 more
doaj +1 more source
Explosive Nucleosynthesis: What We Learned and What We Still Do Not Understand
, 2019 This review touches on historical aspects, going back to the early days of nuclear astrophysics, initiated by B2FH and Cameron, discusses (i) the required nuclear input from reaction rates and decay properties up to the nuclear equation of state ...
Friedrich-Karl Thielemann +1 more
core +1 more source
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
openaire +1 more source
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
doaj +1 more source
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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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
doaj +1 more source
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.
doaj +1 more source
Indirect nuclear physics techniques for studying nova nucleosynthesis [PDF]
, 2009 Classical novae are a site of explosive nucleosynthesis where hydrogen rich material from a companion giant star accretes onto the surface of a white warf. Critical to our understanding of nova explosions are proton-capture reaction rates involved in the
Seweryniak, D +27 more
core +2 more sources
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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What do (and don't) we understand about explosive nucleosynthesis? [PDF]
, 2011 Isotopic abundances reflect both nuclear structure and environmental history. Observations are providing new evidence that is helping us to understand astrophysical phenomena, the chemical history of the Galaxy, and the origins of the diverse isotopic ...
J C Blackmon, Blackmon, J. C.
core +1 more source