Collapsars as a major source of r-process elements

@article{Siegel2019CollapsarsAA,
  title={Collapsars as a major source of r-process elements},
  author={D. Siegel and J. Barnes and B. Metzger},
  journal={Nature},
  year={2019},
  volume={569},
  pages={241-244}
}
The production of elements by rapid neutron capture (r-process) in neutron-star mergers is expected theoretically and is supported by multimessenger observations1–3 of gravitational-wave event GW170817: this production route is in principle sufficient to account for most of the r-process elements in the Universe4. Analysis of the kilonova that accompanied GW170817 identified5,6 delayed outflows from a remnant accretion disk formed around the newly born black hole7–10 as the dominant source of… Expand
Using failed supernovae to constrain the Galactic r-process element production
Rapid neutron capture process (r-process) elements have been detected in a large fraction of metal-poor halo stars, with abundances relative to iron (Fe) that vary by over two orders of magnitude.Expand
GW170817 --the first observed neutron star merger and its kilonova: Implications for the astrophysical site of the r-process
  • D. Siegel
  • Physics
  • The European Physical Journal A
  • 2019
Abstract.The first neutron star (NS) merger observed by advanced LIGO and Virgo, GW170817, and its fireworks of electromagnetic counterparts across the entire electromagnetic spectrum marked theExpand
Impact of GW170817 for the nuclear physics of the EOS and the r-process
Abstract The recent LIGO/Virgo detection of gravitational radiation from GW170817 bears the clear signature of a binary neutron star merger and has validated a number of theoretical predictions.Expand
r-Process elements from magnetorotational hypernovae.
TLDR
A large enhancement in r-process elements is observed in the extremely metal-poor star SMSS J200322, which indicates that similar explosions of fast-spinning strongly magnetized stars occurred during the earliest epochs of star formation in the authors' Galaxy. Expand
Neutron star mergers and rare core-collapse supernovae as sources of r-process enrichment in simulated galaxies
We use cosmological, magnetohydrodynamical simulations of Milky Way-mass galaxies from the Auriga project to study their enrichment with rapid neutron capture (r-process) elements. We implement aExpand
R-process enrichment in ultrafaint dwarf galaxies
We study the enrichment and mixing of r-process elements in ultrafaint dwarf galaxies (UFDs). We assume that r-process elements are produced by neutron-star mergers (NSMs), and examine multipleExpand
r-process Enrichment in the Galactic Halo Characterized by Nucleosynthesis Variation in the Ejecta of Coalescing Neutron Star Binaries
A large star-to-star variation in the abundances of r-process elements, as seen in the [Eu/Fe] ratio for Galactic halo stars, is a prominent feature that is distinguishable from other heavy elements.Expand
Identification of strontium in the merger of two neutron stars
TLDR
Reanalysis of the spectra associated with the merger of two neutron stars identifies strontium, spectroscopically establishing the origin of the heavy elements created by rapid neutron capture and proving that neutron stars comprise neutron-rich matter. Expand
Kilonovae
  • B. Metzger
  • Physics, Medicine
  • Living reviews in relativity
  • 2020
TLDR
Joint GW and kilonova observations of GW170817 and future events provide a new avenue to constrain the astrophysical origin of the r-process elements and the equation of state of dense nuclear matter. Expand
Kilonovae
  • B. Metzger
  • Physics, Medicine
  • Living reviews in relativity
  • 2017
TLDR
The history and physics of Kilonovae are reviewed, leading to the current paradigm of week-long emission with a spectral peak at near-infrared wavelengths, and the prospects of kilonova detection following future GW detections of NS–NS/BH–NS mergers are assessed. Expand
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