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Title: The Origin of r-process Elements in the Milky Way

Abstract

Some of the heavy elements, such as gold and europium (Eu), are almost exclusively formed by the rapid neutron capture process (r-process). However, it is still unclear which astrophysical site between core-collapse supernovae and neutron star–neutron star (NS–NS) mergers produced most of the r-process elements in the universe. Galactic chemical evolution (GCE) models can test these scenarios by quantifying the frequency and yields required to reproduce the amount of europium (Eu) observed in galaxies. Although NS–NS mergers have become popular candidates, their required frequency (or rate) needs to be consistent with that obtained from gravitational wave measurements. We address the first NS–NS merger detected by LIGO/Virgo (GW170817) and its associated gamma-ray burst and analyze their implication for the origin of r-process elements. The range of NS–NS merger rate densities of 320–4740 Gpc-3 yr-1 provided by LIGO/Virgo is remarkably consistent with the range required by GCE to explain the Eu abundances in the Milky Way with NS–NS mergers, assuming the solar r-process abundance pattern for the ejecta. Under the same assumption, this event has produced about 1–5 Earth masses of Eu, and 3–13 Earth masses of gold. When using theoretical calculations to derive Eu yields, constraining the role of NS–NS mergersmore » becomes more challenging because of nuclear astrophysics uncertainties. This is the first study that directly combines nuclear physics uncertainties with GCE calculations. Finally, if GW170817 is a representative event, NS–NS mergers can produce Eu in sufficient amounts and are likely to be the main r-process site.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [4];  [5];  [2]; ORCiD logo [2];  [5];  [6];  [7]
  1. Hungarian Academy of Sciences, Budapest (Hungary). Konkoly Observatory. Research Centre for Astronomy and Earth Sciences; Joint Inst. for Nuclear Astrophysics Center for the Evolution of Elements (JINA-CEE), Notre Dame, IN (United States)
  2. Joint Inst. for Nuclear Astrophysics Center for the Evolution of Elements (JINA-CEE), Notre Dame, IN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Polish Academy of Sciences (PAS), Warsaw (Poland). Nicolaus Copernicus Astronomical Center
  4. Radboud Univ. Nijmegen (Netherlands). Inst. of Mathematics, Astrophysics and Particle Physics
  5. Univ. of Notre Dame, IN (United States)
  6. Joint Inst. for Nuclear Astrophysics Center for the Evolution of Elements (JINA-CEE), Notre Dame, IN (United States); Univ. of Notre Dame, IN (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Notre Dame, IN (United States); Joint Inst. for Nuclear Astrophysics Center for the Evolution of Elements (JINA-CEE), Notre Dame, IN (United States); Hungarian Academy of Sciences, Budapest (Hungary); Polish Academy of Sciences (PAS), Warsaw (Poland)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); European Research Council (ERC); National Science Centre (NCN) (Poland)
OSTI Identifier:
1480020
Report Number(s):
LA-UR-17-29520
Journal ID: ISSN 1538-4357
Grant/Contract Number:  
AC52-06NA25396; AC52-07NA27344; SC0013039; PHY-1430152; 724560; DEC-2012/07/E/ST9/01360; 2015/19/B/ST9/01099; 2015/19/B/ST9/03188
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 855; 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; close binaries; gravitational waves; nuclear reactions; nucleosynthesis; abundances; stars

Citation Formats

Côté, Benoit, Fryer, Chris L., Belczynski, Krzysztof, Korobkin, Oleg, Chruślińska, Martyna, Vassh, Nicole, Mumpower, Matthew R., Lippuner, Jonas, Sprouse, Trevor M., Surman, Rebecca, and Wollaeger, Ryan. The Origin of r-process Elements in the Milky Way. United States: N. p., 2018. Web. doi:10.3847/1538-4357/aaad67.
Côté, Benoit, Fryer, Chris L., Belczynski, Krzysztof, Korobkin, Oleg, Chruślińska, Martyna, Vassh, Nicole, Mumpower, Matthew R., Lippuner, Jonas, Sprouse, Trevor M., Surman, Rebecca, & Wollaeger, Ryan. The Origin of r-process Elements in the Milky Way. United States. doi:https://doi.org/10.3847/1538-4357/aaad67
Côté, Benoit, Fryer, Chris L., Belczynski, Krzysztof, Korobkin, Oleg, Chruślińska, Martyna, Vassh, Nicole, Mumpower, Matthew R., Lippuner, Jonas, Sprouse, Trevor M., Surman, Rebecca, and Wollaeger, Ryan. Mon . "The Origin of r-process Elements in the Milky Way". United States. doi:https://doi.org/10.3847/1538-4357/aaad67. https://www.osti.gov/servlets/purl/1480020.
@article{osti_1480020,
title = {The Origin of r-process Elements in the Milky Way},
author = {Côté, Benoit and Fryer, Chris L. and Belczynski, Krzysztof and Korobkin, Oleg and Chruślińska, Martyna and Vassh, Nicole and Mumpower, Matthew R. and Lippuner, Jonas and Sprouse, Trevor M. and Surman, Rebecca and Wollaeger, Ryan},
abstractNote = {Some of the heavy elements, such as gold and europium (Eu), are almost exclusively formed by the rapid neutron capture process (r-process). However, it is still unclear which astrophysical site between core-collapse supernovae and neutron star–neutron star (NS–NS) mergers produced most of the r-process elements in the universe. Galactic chemical evolution (GCE) models can test these scenarios by quantifying the frequency and yields required to reproduce the amount of europium (Eu) observed in galaxies. Although NS–NS mergers have become popular candidates, their required frequency (or rate) needs to be consistent with that obtained from gravitational wave measurements. We address the first NS–NS merger detected by LIGO/Virgo (GW170817) and its associated gamma-ray burst and analyze their implication for the origin of r-process elements. The range of NS–NS merger rate densities of 320–4740 Gpc-3 yr-1 provided by LIGO/Virgo is remarkably consistent with the range required by GCE to explain the Eu abundances in the Milky Way with NS–NS mergers, assuming the solar r-process abundance pattern for the ejecta. Under the same assumption, this event has produced about 1–5 Earth masses of Eu, and 3–13 Earth masses of gold. When using theoretical calculations to derive Eu yields, constraining the role of NS–NS mergers becomes more challenging because of nuclear astrophysics uncertainties. This is the first study that directly combines nuclear physics uncertainties with GCE calculations. Finally, if GW170817 is a representative event, NS–NS mergers can produce Eu in sufficient amounts and are likely to be the main r-process site.},
doi = {10.3847/1538-4357/aaad67},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 855,
place = {United States},
year = {2018},
month = {3}
}

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Figures / Tables:

Table 1 Table 1: Estimates of ejected masses for high-opacity lanthanide-rich material (mdyn) and medium-opacity “winds” (mw), harvested from the recent literature for GW170817.

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Works referenced in this record:

Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817
journal, December 2017


GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
journal, October 2017


Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
journal, October 2017

  • Arcavi, Iair; Hosseinzadeh, Griffin; Howell, D. Andrew
  • Nature, Vol. 551, Issue 7678
  • DOI: 10.1038/nature24291

Neutron star mergers versus core-collapse supernovae as dominant r-process sites in the early Galaxy
journal, March 2004


The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
journal, September 2007


The origin and evolution of r - and s -process elements in the Milky Way stellar disk
journal, January 2016


The first gravitational-wave source from the isolated evolution of two stars in the 40–100 solar mass range
journal, June 2016

  • Belczynski, Krzysztof; Holz, Daniel E.; Bulik, Tomasz
  • Nature, Vol. 534, Issue 7608
  • DOI: 10.1038/nature18322

Short-Duration Gamma-Ray Bursts
journal, August 2014


r -process nucleosynthesis from matter ejected in binary neutron star mergers
journal, December 2017


The role of neutron star mergers in the chemical evolution of the Galactic halo
journal, May 2015


Double neutron stars: merger rates revisited
journal, November 2017

  • Chruslinska, Martyna; Belczynski, Krzysztof; Klencki, Jakub
  • Monthly Notices of the Royal Astronomical Society, Vol. 474, Issue 3
  • DOI: 10.1093/mnras/stx2923

Swift and NuSTAR observations of GW170817: Detection of a blue kilonova
journal, October 2017


Outflows from accretion discs formed in neutron star mergers: effect of black hole spin
journal, November 2014

  • Fernández, Rodrigo; Kasen, Daniel; Metzger, Brian D.
  • Monthly Notices of the Royal Astronomical Society, Vol. 446, Issue 1
  • DOI: 10.1093/mnras/stu2112

Delayed outflows from black hole accretion tori following neutron star binary coalescence
journal, August 2013

  • Fernández, Rodrigo; Metzger, Brian D.
  • Monthly Notices of the Royal Astronomical Society, Vol. 435, Issue 1
  • DOI: 10.1093/mnras/stt1312

New Fission Fragment Distributions and r -Process Origin of the Rare-Earth Elements
journal, December 2013


Mass ejection from the merger of binary neutron stars
journal, January 2013


Short-lived 244Pu points to compact binary mergers as sites for heavy r-process nucleosynthesis
journal, December 2015

  • Hotokezaka, Kenta; Piran, Tsvi; Paul, Michael
  • Nature Physics, Vol. 11, Issue 12
  • DOI: 10.1038/nphys3574

R-process enrichment from a single event in an ancient dwarf galaxy
journal, March 2016

  • Ji, Alexander P.; Frebel, Anna; Chiti, Anirudh
  • Nature, Vol. 531, Issue 7596
  • DOI: 10.1038/nature17425

Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
journal, February 2015

  • Just, O.; Bauswein, A.; Pulpillo, R. Ardevol
  • Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 1
  • DOI: 10.1093/mnras/stv009

Origin of the heavy elements in binary neutron-star mergers from a gravitational-wave event
journal, October 2017

  • Kasen, Daniel; Metzger, Brian; Barnes, Jennifer
  • Nature, Vol. 551, Issue 7678
  • DOI: 10.1038/nature24453

Illuminating gravitational waves: A concordant picture of photons from a neutron star merger
journal, October 2017


Implications of PSR J0737-3039B for the Galactic NS-NS binary merger rate
journal, January 2015

  • Kim, C.; Perera, B. B. P.; McLaughlin, M. A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 1
  • DOI: 10.1093/mnras/stu2729

R-process nucleosynthesis and nuclei far from the region of β-stability
journal, March 1975


On the astrophysical robustness of the neutron star merger r-process: Robust r-process in neutron star mergers
journal, October 2012


Evolution of the Milky Way with radial motions of stars and gas: I. The solar neighbourhood and the thin and thick disks⋆
journal, August 2015


Black-hole-neutron-star collisions
journal, September 1974

  • Lattimer, J. M.; Schramm, D. N.
  • The Astrophysical Journal, Vol. 192
  • DOI: 10.1086/181612

Signatures of hypermassive neutron star lifetimes on r-process nucleosynthesis in the disc ejecta from neutron star mergers
journal, August 2017

  • Lippuner, Jonas; Fernández, Rodrigo; Roberts, Luke F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 1
  • DOI: 10.1093/mnras/stx1987

Cosmic Star-Formation History
journal, August 2014


Europium production: neutron star mergers versus core-collapse supernovae
journal, January 2014

  • Matteucci, F.; Romano, D.; Arcones, A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 438, Issue 3
  • DOI: 10.1093/mnras/stt2350

The effect of different type Ia supernova progenitors on Galactic chemical evolution
journal, May 2009


Nuclear robustness of the r process in neutron-star mergers
journal, November 2015

  • Mendoza-Temis, Joel de Jesús; Wu, Meng-Ru; Langanke, Karlheinz
  • Physical Review C, Vol. 92, Issue 5
  • DOI: 10.1103/PhysRevC.92.055805

Massive double compact object mergers: gravitational wave sources and r-process element production sites
journal, April 2014


Kilonovae
journal, May 2017


Electromagnetic counterparts of compact object mergers powered by the radioactive decay of r-process nuclei: Transients from compact object mergers
journal, June 2010


Sensitivity studies for the main r process: β-decay rates
journal, April 2014

  • Mumpower, M.; Cass, J.; Passucci, G.
  • AIP Advances, Vol. 4, Issue 4
  • DOI: 10.1063/1.4867192

Neutron- γ competition for β -delayed neutron emission
journal, December 2016


Influence of neutron capture rates in the rare earth region on the r -process abundance pattern
journal, September 2012


Impact of individual nuclear masses on r -process abundances
journal, September 2015


The impact of individual nuclear properties on r -process nucleosynthesis
journal, January 2016

  • Mumpower, M. R.; Surman, R.; McLaughlin, G. C.
  • Progress in Particle and Nuclear Physics, Vol. 86
  • DOI: 10.1016/j.ppnp.2015.09.001

Neutrino-driven winds from neutron star merger remnants
journal, August 2014

  • Perego, A.; Rosswog, S.; Cabezon, R. M.
  • Monthly Notices of the Royal Astronomical Society, Vol. 443, Issue 4
  • DOI: 10.1093/mnras/stu1352

Planck 2015 results : XIII. Cosmological parameters
journal, September 2016


Dynamical mass ejection from binary neutron star mergers
journal, May 2016

  • Radice, David; Galeazzi, Filippo; Lippuner, Jonas
  • Monthly Notices of the Royal Astronomical Society, Vol. 460, Issue 3
  • DOI: 10.1093/mnras/stw1227

The dynamic ejecta of compact object mergers and eccentric collisions
journal, June 2013

  • Rosswog, Stephan
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 371, Issue 1992
  • DOI: 10.1098/rsta.2012.0272

The multimessenger picture of compact object encounters: binary mergers versus dynamical collisions
journal, February 2013

  • Rosswog, S.; Piran, T.; Nakar, E.
  • Monthly Notices of the Royal Astronomical Society, Vol. 430, Issue 4
  • DOI: 10.1093/mnras/sts708

AT 2017gfo: An Anisotropic and Three-component Kilonova Counterpart of GW170817
journal, November 2017

  • Perego, Albino; Radice, David; Bernuzzi, Sebastiano
  • The Astrophysical Journal, Vol. 850, Issue 2
  • DOI: 10.3847/2041-8213/aa9ab9

Chempy: A flexible chemical evolution model for abundance fitting: Do the Sun’s abundances alone constrain chemical evolution models?
journal, September 2017


On the impact of neutron star binaries’ natal-kick distribution on the Galactic r-process enrichment
journal, July 2017

  • Safarzadeh, Mohammadtaher; Côté, Benoit
  • Monthly Notices of the Royal Astronomical Society, Vol. 471, Issue 4
  • DOI: 10.1093/mnras/stx1897

Dynamical mass ejection from the merger of asymmetric binary neutron stars: Radiation-hydrodynamics study in general relativity
journal, June 2016


A kilonova as the electromagnetic counterpart to a gravitational-wave source
journal, October 2017

  • Smartt, S. J.; Chen, T. -W.; Jerkstrand, A.
  • Nature, Vol. 551, Issue 7678
  • DOI: 10.1038/nature24303

Neutron-Capture Elements in the Early Galaxy
journal, September 2008


The temporal evolution of neutron-capture elements in the Galactic discs
journal, November 2017

  • Spina, Lorenzo; Meléndez, Jorge; Karakas, Amanda I.
  • Monthly Notices of the Royal Astronomical Society
  • DOI: 10.1093/mnras/stx2938

Properties of Kilonovae from Dynamical and Post-merger Ejecta of Neutron Star Mergers
journal, January 2018

  • Tanaka, Masaomi; Kato, Daiji; Gaigalas, Gediminas
  • The Astrophysical Journal, Vol. 852, Issue 2
  • DOI: 10.3847/1538-4357/aaa0cb

Kilonova from post-merger ejecta as an optical and near-Infrared counterpart of GW170817
journal, October 2017

  • Tanaka, Masaomi; Utsumi, Yousuke; Mazzali, Paolo A.
  • Publications of the Astronomical Society of Japan, Vol. 69, Issue 6
  • DOI: 10.1093/pasj/psx121

A ‘kilonova’ associated with the short-duration γ-ray burst GRB 130603B
journal, August 2013

  • Tanvir, N. R.; Levan, A. J.; Fruchter, A. S.
  • Nature, Vol. 500, Issue 7464
  • DOI: 10.1038/nature12505

Neutron Star Mergers and Nucleosynthesis of Heavy Elements
journal, October 2017


The X-ray counterpart to the gravitational-wave event GW170817
journal, October 2017


Galactic r-process enrichment by neutron star mergers in cosmological simulations of a Milky Way-mass galaxy
journal, December 2014

  • van de Voort, Freeke; Quataert, Eliot; Hopkins, Philip F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 447, Issue 1
  • DOI: 10.1093/mnras/stu2404

The NumPy Array: A Structure for Efficient Numerical Computation
journal, March 2011

  • van der Walt, Stéfan; Colbert, S. Chris; Varoquaux, Gaël
  • Computing in Science & Engineering, Vol. 13, Issue 2
  • DOI: 10.1109/MCSE.2011.37

Galactic distribution of merging neutron stars and black holes - prospects for short gamma-ray burst progenitors and LIGO/VIRGO
journal, July 2003


The GW170817/GRB 170817A/AT 2017gfo Association: Some Implications for Physics and Astrophysics
journal, December 2017


Galactic evolution of rapid neutron capture process abundances: the inhomogeneous approach
journal, July 2015

  • Wehmeyer, B.; Pignatari, M.; Thielemann, F. -K.
  • Monthly Notices of the Royal Astronomical Society, Vol. 452, Issue 2
  • DOI: 10.1093/mnras/stv1352

A possible macronova in the late afterglow of the long–short burst GRB 060614
journal, June 2015

  • Yang, Bin; Jin, Zhi-Ping; Li, Xiang
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8323

Evolution of the Milky Way with radial motions of stars and gas: II. The evolution of abundance profiles from H to Ni
journal, August 2015


Planck 2015 results : XXIII. The thermal Sunyaev-Zeldovich effect-cosmic infrared background correlation
journal, September 2016


A kilonova as the electromagnetic counterpart to a gravitational-wave source
text, January 2017

  • Smartt, S. J.; Chen, T. -W.; Jerkstrand, A.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/pubdb-2017-12239

    Works referencing / citing this record:

    Impact of Pulsar and Fallback Sources on Multifrequency Kilonova Models
    journal, July 2019

    • Wollaeger, Ryan T.; Fryer, Chris L.; Fontes, Christopher J.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab25f5

    The R -Process Alliance: A Comprehensive Abundance Analysis of HD 222925, a Metal-poor Star with an Extreme R -process Enhancement of [Eu/H] = −0.14
    journal, October 2018

    • Roederer, Ian U.; Sakari, Charli M.; Placco, Vinicius M.
    • The Astrophysical Journal, Vol. 865, Issue 2
    • DOI: 10.3847/1538-4357/aadd92

    Abundance to age ratios in the HARPS-GTO sample with Gaia DR2 : Chemical clocks for a range of [Fe/H]★★★
    journal, April 2019


    Finding the Remnants of the Milky Way's Last Neutron Star Mergers
    journal, July 2019

    • Wu, Meng-Ru; Banerjee, Projjwal; Metzger, Brian D.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab2593

    Binary neutron stars and production of heavy elements
    journal, January 2019

    • Matteucci, Francesca; Romano, Donatella; Cescutti, Gabriele
    • Rendiconti Lincei. Scienze Fisiche e Naturali, Vol. 30, Issue S1
    • DOI: 10.1007/s12210-018-0754-z

    Binary neutron stars and production of heavy elements
    journal, January 2019

    • Matteucci, Francesca; Romano, Donatella; Cescutti, Gabriele
    • Rendiconti Lincei. Scienze Fisiche e Naturali, Vol. 30, Issue S1
    • DOI: 10.1007/s12210-018-0754-z

    Abundance to age ratios in the HARPS-GTO sample with Gaia DR2 : Chemical clocks for a range of [Fe/H]★★★
    journal, April 2019


    Gradient subgrid-scale model for relativistic MHD large-eddy simulations
    journal, March 2020


    GW170817 --the first observed neutron star merger and its kilonova: Implications for the astrophysical site of the r-process
    journal, November 2019


    The R -Process Alliance: A Comprehensive Abundance Analysis of HD 222925, a Metal-poor Star with an Extreme R -process Enhancement of [Eu/H] = −0.14
    journal, October 2018

    • Roederer, Ian U.; Sakari, Charli M.; Placco, Vinicius M.
    • The Astrophysical Journal, Vol. 865, Issue 2
    • DOI: 10.3847/1538-4357/aadd92

    Finding the Remnants of the Milky Way's Last Neutron Star Mergers
    journal, July 2019

    • Wu, Meng-Ru; Banerjee, Projjwal; Metzger, Brian D.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab2593

    Impact of Pulsar and Fallback Sources on Multifrequency Kilonova Models
    journal, July 2019

    • Wollaeger, Ryan T.; Fryer, Chris L.; Fontes, Christopher J.
    • The Astrophysical Journal, Vol. 880, Issue 1
    • DOI: 10.3847/1538-4357/ab25f5

    Influence of nuclear physics inputs and astrophysical conditions on r-process
    journal, February 2019

    • Li, Zhu; Niu, ZhongMing; Sun, BaoHua
    • Science China Physics, Mechanics & Astronomy, Vol. 62, Issue 8
    • DOI: 10.1007/s11433-018-9355-y

    The origin of s-process isotope heterogeneity in the solar protoplanetary disk
    journal, December 2019


    A nearby neutron-star merger explains the actinide abundances in the early Solar System
    journal, May 2019


    The origin of the first neutron star – neutron star merger
    journal, July 2018


    A statistical method for the identification of stars enriched in neutron-capture elements from medium-resolution spectra
    journal, October 2019


    Equation-of-state constraints and the QCD phase transition in the era of gravitational-wave astronomy
    conference, January 2019

    • Bauswein, Andreas; Bastian, Niels-Uwe Friedrich; Blaschke, David
    • XIAMEN-CUSTIPEN WORKSHOP ON THE EQUATION OF STATE OF DENSE NEUTRON-RICH MATTER IN THE ERA OF GRAVITATIONAL WAVE ASTRONOMY, AIP Conference Proceedings
    • DOI: 10.1063/1.5117803

    r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos
    journal, July 2019

    • Horowitz, C. J.; Arcones, A.; Côté, B.
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 8
    • DOI: 10.1088/1361-6471/ab0849

    On the formation of neutron stars via accretion-induced collapse in binaries
    journal, January 2019

    • Ruiter, A. J.; Ferrario, L.; Belczynski, K.
    • Monthly Notices of the Royal Astronomical Society, Vol. 484, Issue 1
    • DOI: 10.1093/mnras/stz001

    The chemical evolution of r-process elements from neutron star mergers: the role of a 2-phase interstellar medium
    journal, April 2019

    • Schönrich, Ralph A.; Weinberg, David H.
    • Monthly Notices of the Royal Astronomical Society, Vol. 487, Issue 1
    • DOI: 10.1093/mnras/stz1126

    The role of magnetic field geometry in the evolution of neutron star merger accretion discs
    journal, September 2019

    • Christie, I. M.; Lalakos, A.; Tchekhovskoy, A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 4
    • DOI: 10.1093/mnras/stz2552

    Neutron star binary orbits in their host potential: effect on early r-process enrichment
    journal, September 2019

    • Bonetti, Matteo; Perego, Albino; Dotti, Massimo
    • Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 1
    • DOI: 10.1093/mnras/stz2554

    A luminosity distribution for kilonovae based on short gamma-ray burst afterglows
    journal, March 2019

    • Ascenzi, Stefano; Coughlin, Michael W.; Dietrich, Tim
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 1
    • DOI: 10.1093/mnras/stz891

    A new delay time distribution for merging neutron stars tested against Galactic and cosmic data
    journal, April 2019

    • Simonetti, Paolo; Matteucci, Francesca; Greggio, Laura
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 2
    • DOI: 10.1093/mnras/stz991

    Full transport model of GW170817-like disk produces a blue kilonova
    journal, July 2019


    Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation
    journal, June 2018


    Origins of meteoritic nanodiamonds investigated by coordinated atom‐probe tomography and transmission electron microscopy studies
    journal, August 2019

    • Lewis, Josiah B.; Floss, Christine; Isheim, Dieter
    • Meteoritics & Planetary Science, Vol. 55, Issue 6
    • DOI: 10.1111/maps.13373

    Kinematics of Highly r -process-enhanced Field Stars: Evidence for an Accretion Origin and Detection of Several Groups from Disrupted Satellites
    journal, October 2018

    • Roederer, Ian U.; Hattori, Kohei; Valluri, Monica
    • The Astronomical Journal, Vol. 156, Issue 4
    • DOI: 10.3847/1538-3881/aadd9c

    β -delayed Fission in r -process Nucleosynthesis
    journal, December 2018

    • Mumpower, M. R.; Kawano, T.; Sprouse, T. M.
    • The Astrophysical Journal, Vol. 869, Issue 1
    • DOI: 10.3847/1538-4357/aaeaca

    Actinide Production in the Neutron-rich Ejecta of a Neutron Star Merger
    journal, December 2018

    • Holmbeck, Erika M.; Sprouse, Trevor M.; Mumpower, Matthew R.
    • The Astrophysical Journal, Vol. 870, Issue 1
    • DOI: 10.3847/1538-4357/aaefef

    The Origin of r -process Enhanced Metal-poor Halo Stars In Now-destroyed Ultra-faint Dwarf Galaxies
    journal, February 2019

    • Brauer, Kaley; Ji, Alexander P.; Frebel, Anna
    • The Astrophysical Journal, Vol. 871, Issue 2
    • DOI: 10.3847/1538-4357/aafafb

    Neutron Star Mergers Might Not Be the Only Source of r -process Elements in the Milky Way
    journal, April 2019

    • Côté, Benoit; Eichler, Marius; Arcones, Almudena
    • The Astrophysical Journal, Vol. 875, Issue 2
    • DOI: 10.3847/1538-4357/ab10db

    On Neutron Star Mergers as the Source of r -process-enhanced Metal-poor Stars in the Milky Way
    journal, April 2019

    • Safarzadeh, Mohammadtaher; Sarmento, Richard; Scannapieco, Evan
    • The Astrophysical Journal, Vol. 876, Issue 1
    • DOI: 10.3847/1538-4357/ab1341

    Actinide-rich and Actinide-poor r -process-enhanced Metal-poor Stars Do Not Require Separate r -process Progenitors
    journal, August 2019

    • Holmbeck, Erika M.; Frebel, Anna; McLaughlin, G. C.
    • The Astrophysical Journal, Vol. 881, Issue 1
    • DOI: 10.3847/1538-4357/ab2a01

    Merging Rates of Compact Binaries in Galaxies: Perspectives for Gravitational Wave Detections
    journal, August 2019


    The Lanthanide Fraction Distribution in Metal-poor Stars: A Test of Neutron Star Mergers as the Dominant r -process Site
    journal, August 2019

    • Ji, Alexander P.; Drout, Maria R.; Hansen, Terese T.
    • The Astrophysical Journal, Vol. 882, Issue 1
    • DOI: 10.3847/1538-4357/ab3291

    Chemical Abundance Analysis of Tucana III, the Second r -process Enhanced Ultra-faint Dwarf Galaxy
    journal, September 2019


    Can Neutron-star Mergers Explain the r -process Enrichment in Globular Clusters?
    journal, November 2019

    • Zevin, Michael; Kremer, Kyle; Siegel, Daniel M.
    • The Astrophysical Journal, Vol. 886, Issue 1
    • DOI: 10.3847/1538-4357/ab498b

    Learning about the Intermediate Neutron-capture Process from Lead Abundances
    journal, December 2019

    • Hampel, Melanie; Karakas, Amanda I.; Stancliffe, Richard J.
    • The Astrophysical Journal, Vol. 887, Issue 1
    • DOI: 10.3847/1538-4357/ab4fe8

    Gamma Rays from Kilonova: A Potential Probe of r -process Nucleosynthesis
    journal, February 2020

    • Korobkin, Oleg; Hungerford, Aimee M.; Fryer, Christopher L.
    • The Astrophysical Journal, Vol. 889, Issue 2
    • DOI: 10.3847/1538-4357/ab64d8

    r -process Enrichment in the Galactic Halo Characterized by Nucleosynthesis Variation in the Ejecta of Coalescing Neutron Star Binaries
    journal, January 2020

    • Tsujimoto, Takuji; Nishimura, Nobuya; Kyutoku, Koutarou
    • The Astrophysical Journal, Vol. 889, Issue 2
    • DOI: 10.3847/1538-4357/ab655c

    ν bhlight : Radiation GRMHD for Neutrino-driven Accretion Flows
    journal, April 2019

    • Miller, Jonah M.; Ryan, Ben. R.; Dolence, Joshua C.
    • The Astrophysical Journal Supplement Series, Vol. 241, Issue 2
    • DOI: 10.3847/1538-4365/ab09fc

    GROWTH on S190426c: Real-time Search for a Counterpart to the Probable Neutron Star–Black Hole Merger using an Automated Difference Imaging Pipeline for DECam
    journal, August 2019

    • Goldstein, Daniel A.; Andreoni, Igor; Nugent, Peter E.
    • The Astrophysical Journal, Vol. 881, Issue 1
    • DOI: 10.3847/2041-8213/ab3046

      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.