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:
-
[1];
[4];
[5];
[7]
- Univ. of California, Berkeley, CA (United States)
- Michigan State Univ., East Lansing, MI (United States)
- Univ. of California, Berkeley, CA (United States); Princeton Univ., Princeton, NJ (United States)
- California Inst. of Technology (CalTech), Pasadena, CA (United States); Kyoto Univ., Kyoto (Japan)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Illinois, Urbana-Champaign, IL (United States)
- 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:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); 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. Mon .
"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},
journal = {The Astrophysical Journal (Online)},
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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