RETRACTED ARTICLE:<i>r</i>-process nucleosynthesis in the MHD+neutrino-heated collapsar jet
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No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Post-publication record
- Nature
- Retraction
- Reason
- Duplication of/in Article;
- Date
- 8/23/2022 0:00
- Flagged by OpenAlex?
- Yes
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Abstract
It has been proposed that the collapsar scenario for long-duration gamma ray bursts is a possible astrophysical site for r -process nucleosynthesis. Here we present r -process nucleosynthesis calculations based upon a model for a MHD+neutrino-heated collapsar jet. We utilize a relativistic magnetohydrodynamic model that includes ray-tracing neutrino transport to describe the development of the black hole accretion disk and the neutrino heating of the funnel region above the black hole. The late time evolution of the collapsar jet is then evolved using axisymmetric special relativistic hydrodynamics. We employ representative test particles to follow the trajectories in density, temperature, entropy, and electron fraction for material flowing from the accretion disk into the jet until they are several thousand km above the black hole. The evolution of nuclear abundances from nucleons to heavy nuclei for ejected test particle trajectories was solved in a large nuclear reaction network as temperatures fall from 9 × 10 9 to 3 × 10 8 K. We show that an r -process-like abundance distribution forms in material ejected in the collapsar jet. The possibility for a signature of collapsar r -process material to be found in metal-poor stars is discussed.
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The record
- Venue
- Astronomy and Astrophysics
- Topic
- Gamma-ray bursts and supernovae
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- National Astronomical Observatory of JapanCanadian Foundation for Climate and Atmospheric SciencesU.S. Department of EnergyJapan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and TechnologyNational Science Foundation
- Keywords
- PhysicsNucleosynthesisAstrophysicsNeutrinoMagnetohydrodynamicsAccretion (finance)r-processBlack hole (networking)StarsAstronomyNuclear physicsPlasma
- Has abstract in OpenAlex
- yes