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Title: r-process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae

Abstract

Here, we investigate r-process nucleosynthesis in 3D general-relativistic magnetohydrodynamic simulations of rapidly rotating strongly magnetized core collapse. The simulations include a microphysical finite-temperature equation of state and a leakage scheme that captures the overall energetics and lepton number exchange due to postbounce neutrino emission and absorption. We track the composition of the ejected material using the nuclear reaction network SkyNet. Our results show that the 3D dynamics of magnetorotational core-collapse supernovae (CCSN) are important for their nucleosynthetic signature. We find that production of r-process material beyond the second peak is reduced by a factor of 100 when the magnetorotational jets produced by the rapidly rotating core undergo a kink instability. Our results indicate that 3D magnetorotationally powered CCSNe are robust r-process sources only if they are obtained by the collapse of cores with unrealistically large precollapse magnetic fields of the order of 1013 G. Additionally, a comparison simulation that we restrict to axisymmetry results in overly optimistic r-process production for lower magnetic field strengths.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5];  [6]; ORCiD logo [7]
  1. Univ. of California, Berkeley, CA (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Univ. of California, Berkeley, CA (United States); Princeton Univ., Princeton, NJ (United States)
  4. California Inst. of Technology (CalTech), Pasadena, CA (United States); Kyoto Univ., Kyoto (Japan)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Univ. of Illinois, Urbana-Champaign, IL (United States)
  7. Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada); Univ. of Guelph, Guelph, ON (Canada); Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1480039
Report Number(s):
LA-UR-17-31278
Journal ID: ISSN 1538-4357
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 864; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gamma-ray burst: general instabilities magnetohydrodynamics neutrinos supernovae: general nucleosynthesis; gamma-ray burst: general; instabilities; magnetohydrodynamics; neutrinos; supernovae: general; nucleosynthesis

Citation Formats

Mösta, Philipp, Roberts, Luke F., Halevi, Goni, Ott, Christian D., Lippuner, Jonas, Haas, Roland, and Schnetter, Erik. r-process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aad6ec.
Mösta, Philipp, Roberts, Luke F., Halevi, Goni, Ott, Christian D., Lippuner, Jonas, Haas, Roland, & Schnetter, Erik. r-process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae. United States. https://doi.org/10.3847/1538-4357/aad6ec
Mösta, Philipp, Roberts, Luke F., Halevi, Goni, Ott, Christian D., Lippuner, Jonas, Haas, Roland, and Schnetter, Erik. 2018. "r-process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae". United States. https://doi.org/10.3847/1538-4357/aad6ec. https://www.osti.gov/servlets/purl/1480039.
@article{osti_1480039,
title = {r-process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae},
author = {Mösta, Philipp and Roberts, Luke F. and Halevi, Goni and Ott, Christian D. and Lippuner, Jonas and Haas, Roland and Schnetter, Erik},
abstractNote = {Here, we investigate r-process nucleosynthesis in 3D general-relativistic magnetohydrodynamic simulations of rapidly rotating strongly magnetized core collapse. The simulations include a microphysical finite-temperature equation of state and a leakage scheme that captures the overall energetics and lepton number exchange due to postbounce neutrino emission and absorption. We track the composition of the ejected material using the nuclear reaction network SkyNet. Our results show that the 3D dynamics of magnetorotational core-collapse supernovae (CCSN) are important for their nucleosynthetic signature. We find that production of r-process material beyond the second peak is reduced by a factor of 100 when the magnetorotational jets produced by the rapidly rotating core undergo a kink instability. Our results indicate that 3D magnetorotationally powered CCSNe are robust r-process sources only if they are obtained by the collapse of cores with unrealistically large precollapse magnetic fields of the order of 1013 G. Additionally, a comparison simulation that we restrict to axisymmetry results in overly optimistic r-process production for lower magnetic field strengths.},
doi = {10.3847/1538-4357/aad6ec},
url = {https://www.osti.gov/biblio/1480039}, journal = {The Astrophysical Journal (Online)},
issn = {1538-4357},
number = 2,
volume = 864,
place = {United States},
year = {Mon Sep 10 00:00:00 EDT 2018},
month = {Mon Sep 10 00:00:00 EDT 2018}
}

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Neutron star binary orbits in their host potential: effect on early r-process enrichment
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The impact of non-dipolar magnetic fields in core-collapse supernovae
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Neutron Star Mergers are the Dominant Source of the r -process in the Early Evolution of Dwarf Galaxies
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r -process Enrichment of the Ultra-faint Dwarf Galaxies by Fast-merging Double-neutron Stars
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Neutron Star Mergers Might Not Be the Only Source of r -process Elements in the Milky Way
journal, April 2019


The Common Envelope Jet Supernova (CEJSN) r -process Scenario
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Probing the Production of Actinides under Different r-process Conditions
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Finding the Remnants of the Milky Way's Last Neutron Star Mergers
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