MAGNETOROTATIONALLY DRIVEN SUPERNOVAE AS THE ORIGIN OF EARLY GALAXY r-PROCESS ELEMENTS?
C. Winteler,Roger Käppeli,Albino Perego,Almudena Arcones,Nicolas Vasset,Nobuya Nishimura,Matthias Liebendörfer,Friedrich-Karl Thielemann +7 more
TLDR
In this paper, the authors examined magnetorotationally driven supernovae as sources of r-process elements in the early Galaxy and found that the peak distribution of Ye in the ejecta is shifted from 0.15 to 0.17 and broadened toward higher Ye due to neutrino absorption.Abstract:
We examine magnetorotationally driven supernovae as sources of r-process elements in the early Galaxy. On the basis of thermodynamic histories of tracer particles from a three-dimensional magnetohydrodynamical core-collapse supernova model with approximated neutrino transport, we perform nucleosynthesis calculations with and without considering the effects of neutrino absorption reactions on the electron fraction (Ye ) during post-processing. We find that the peak distribution of Ye in the ejecta is shifted from ~0.15 to ~0.17 and broadened toward higher Ye due to neutrino absorption. Nevertheless, in both cases, the second and third peaks of the solar r-process element distribution can be reproduced well. The rare progenitor configuration that was used here, characterized by a high rotation rate and a large magnetic field necessary for the formation of bipolar jets, could naturally provide a site for the strong r-process in agreement with observations of the early Galactic chemical evolution.read more
Citations
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The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
Nial R. Tanvir,Andrew J. Levan,Carlos González-Fernández,Oleg Korobkin,Ilya Mandel,Stephan Rosswog,Jens Hjorth,P. D'Avanzo,A. S. Fruchter,Chris L. Fryer,Tuomas Kangas,Bo Milvang-Jensen,S. Rosetti,Danny Steeghs,Ryan Wollaeger,Zach Cano,Chris M. Copperwheat,Stefano Covino,Valerio D'Elia,Valerio D'Elia,A. de Ugarte Postigo,A. de Ugarte Postigo,P. A. Evans,Wesley Even,Stephen Fairhurst,R. Figuera Jaimes,Christopher J. Fontes,Yuri I. Fujii,Yuri I. Fujii,Johan P. U. Fynbo,B. P. Gompertz,Jochen Greiner,G. Hodosan,Mike Irwin,Pall Jakobsson,U. G. Jørgensen,David Alexander Kann,J. D. Lyman,D. Malesani,Richard G. McMahon,A. Melandri,P. T. O'Brien,J. P. Osborne,Eliana Palazzi,Daniel A. Perley,Elena Pian,S. Piranomonte,Markus Rabus,E. Rol,Antonia Rowlinson,Antonia Rowlinson,Steve Schulze,Patrick J. Sutton,Christina C. Thöne,Krzysztof Ulaczyk,Darach Watson,Klaas Wiersema,Ralph A. M. J. Wijers +57 more
TL;DR: In this article, the authors reported the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) and as a short gamma-ray burst by Fermi Gamma-ray Burst Monitor (GBM) and Integral SPI-ACS (GRB 170817A).
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The Dawes Review 2: Nucleosynthesis and stellar yields of low-and intermediate-mass single stars
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On the astrophysical robustness of the neutron star merger r-process
Oleg Korobkin,Stephan Rosswog,Stephan Rosswog,Stephan Rosswog,Almudena Arcones,Almudena Arcones,C. Winteler +6 more
TL;DR: In this paper, the authors explore nucleosynthesis in the dynamic ejecta of compact binary mergers and compare the results with those from two simulations of a neutron star black hole merger.
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On the astrophysical robustness of neutron star merger r-process
TL;DR: In this article, the nucleosynthesis in the dynamic ejecta of compact binary mergers is explored and the authors compare the results with those from two simulations of a neutron star black hole merger.
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Systematics of dynamical mass ejection, nucleosynthesis, and radioactively powered electromagnetic signals from neutron-star mergers
TL;DR: In this article, the authors investigate the dynamical mass ejection, r-process nucleosynthesis, and properties of electromagnetic counterparts of neutron-star (NS) mergers in dependence on the uncertain properties of the nuclear equation of state (EOS) by employing 40 representative, high-density EOSs in relativistic, hydrodynamical simulations.
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