r-process nucleosynthesis from matter ejected in binary neutron star mergers [On r-process nucleosynthesis from matter ejected in binary neutron star mergers]

Bovard, Luke; Martin, Dirk; Guercilena, Federico; Arcones, Almudena; Rezzolla, Luciano; Korobkin, Oleg

doi:10.1103/PhysRevD.96.124005

Title: $r$ -process nucleosynthesis from matter ejected in binary neutron star mergers [On $r$ -process nucleosynthesis from matter ejected in binary neutron star mergers]

Abstract

Here, when binary systems of neutron stars merge, a very small fraction of their rest mass is ejected, either dynamically or secularly. This material is neutron-rich and its nucleosynthesis provides the astrophysical site for the production of heavy elements in the Universe, together with a kilonova signal confirming neutron-star mergers as the origin of short gamma-ray bursts. We perform full general-relativistic simulations of binary neutron-star mergers employing three different nuclear-physics equations of state (EOSs), considering both equal- and unequal-mass configurations, and adopting a leakage scheme to account for neutrino radiative losses. Using a combination of techniques, we carry out an extensive and systematic study of the hydrodynamical, thermodynamical, and geometrical properties of the matter ejected dynamically, employing the WinNet nuclear-reaction network to recover the relative abundances of heavy elements produced by each configurations. Among the results obtained, three are particularly important. First, we find that, within the sample considered here, both the properties of the dynamical ejecta and the nucleosynthesis yields are robust against variations of the EOS and masses. Second, using a conservative but robust criterion for unbound matter, we find that the amount of ejected mass is ≲10^–3 M⊙, hence at least one order of magnitude smaller thanmore »« less

Authors:

Bovard, Luke ^[1]; Martin, Dirk ^[2]; Guercilena, Federico ^[1]; Arcones, Almudena ^[2]; Rezzolla, Luciano ^[3];

^[4]

Johann Wolfgang Goethe-Univ., Frankfurt (Germany)
Technische Univ. Darmstadt, Darmstadt (Germany); GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
Johann Wolfgang Goethe-Univ., Frankfurt (Germany); Frankfurt Institute for Advanced Studies, Frankfurt (Germany)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: 2017-12-05

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program

OSTI Identifier:: 1415425

Alternate Identifier(s):: OSTI ID: 1411272

Report Number(s):: LA-UR-17-29073
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1800818

Grant/Contract Number:: AC52-06NA25396; VH-NG-825

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 96; Journal Issue: 12; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; neutron star, mergers, r-process, kilonova

Citation Formats


                    Bovard, Luke, Martin, Dirk, Guercilena, Federico, Arcones, Almudena, Rezzolla, Luciano, and Korobkin, Oleg. r-process nucleosynthesis from matter ejected in binary neutron star mergers [On r-process nucleosynthesis from matter ejected in binary neutron star mergers].  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevD.96.124005.

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                    Bovard, Luke, Martin, Dirk, Guercilena, Federico, Arcones, Almudena, Rezzolla, Luciano, & Korobkin, Oleg. r-process nucleosynthesis from matter ejected in binary neutron star mergers [On r-process nucleosynthesis from matter ejected in binary neutron star mergers].  United States.  https://doi.org/10.1103/PhysRevD.96.124005

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                    Bovard, Luke, Martin, Dirk, Guercilena, Federico, Arcones, Almudena, Rezzolla, Luciano, and Korobkin, Oleg. Tue .  
"r-process nucleosynthesis from matter ejected in binary neutron star mergers [On r-process nucleosynthesis from matter ejected in binary neutron star mergers]".  United States.  https://doi.org/10.1103/PhysRevD.96.124005.  https://www.osti.gov/servlets/purl/1415425.

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@article{osti_1415425,

  title        = {r-process nucleosynthesis from matter ejected in binary neutron star mergers [On r-process nucleosynthesis from matter ejected in binary neutron star mergers]},

  author       = {Bovard, Luke and Martin, Dirk and Guercilena, Federico and Arcones, Almudena and Rezzolla, Luciano and Korobkin, Oleg},

  abstractNote = {Here, when binary systems of neutron stars merge, a very small fraction of their rest mass is ejected, either dynamically or secularly. This material is neutron-rich and its nucleosynthesis provides the astrophysical site for the production of heavy elements in the Universe, together with a kilonova signal confirming neutron-star mergers as the origin of short gamma-ray bursts. We perform full general-relativistic simulations of binary neutron-star mergers employing three different nuclear-physics equations of state (EOSs), considering both equal- and unequal-mass configurations, and adopting a leakage scheme to account for neutrino radiative losses. Using a combination of techniques, we carry out an extensive and systematic study of the hydrodynamical, thermodynamical, and geometrical properties of the matter ejected dynamically, employing the WinNet nuclear-reaction network to recover the relative abundances of heavy elements produced by each configurations. Among the results obtained, three are particularly important. First, we find that, within the sample considered here, both the properties of the dynamical ejecta and the nucleosynthesis yields are robust against variations of the EOS and masses. Second, using a conservative but robust criterion for unbound matter, we find that the amount of ejected mass is ≲10–3 M⊙, hence at least one order of magnitude smaller than what normally assumed in modelling kilonova signals. Finally, using a simplified and gray-opacity model we assess the observability of the infrared kilonova emission finding, that for all binaries the luminosity peaks around ~1/2 day in the H-band, reaching a maximum magnitude of –13, and decreasing rapidly after one day.},

  doi          = {10.1103/PhysRevD.96.124005},

  journal      = {Physical Review D},

  number       = 12,

  volume       = 96,

  place        = {United States},

  year         = {2017},

  month        = {12}

}

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SYSTEMATICS OF DYNAMICAL MASS EJECTION, NUCLEOSYNTHESIS, AND RADIOACTIVELY POWERED ELECTROMAGNETIC SIGNALS FROM NEUTRON-STAR MERGERS

Journal Article Bauswein, A. ; Janka, H. -T. ; Goriely, S. - Astrophysical Journal

We investigate systematically 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, microphysical high-density EOSs in relativistic, hydrodynamical simulations. The crucial parameter determining the ejecta mass is the radius R{sub 1.35} of a 1.35 M{sub Sun} NS. NSs with smaller R{sub 1.35} (''soft'' EOS) eject systematically higher masses. These range from {approx}10{sup -3} M{sub Sun} to {approx}10{sup -2} M{sub Sun} for 1.35-1.35 M{sub Sun} binaries and from {approx}5 Multiplication-Sign 10{sup -3} M{sub Sun} to {approx}2 Multiplication-Sign 10{supmore »« less
https://doi.org/10.1088/0004-637X/773/1/78
Nucleosynthesis in Outflows from Black Hole–Neutron Star Merger Disks with Full GR(ν)RMHD

Journal Article Curtis, Sanjana ; Miller, Jonah M. ; Fröhlich, Carla ; ... - The Astrophysical Journal. Letters

Abstract Along with binary neutron star mergers, the inspiral and merger of a black hole and a neutron star is a predicted site of r -process nucleosynthesis and associated kilonovae. For the right mass ratio, very large amounts of neutron-rich material (relative to the dynamical ejecta) may become unbound from the post-merger accretion disk. We simulate a suite of four post-merger disks with three-dimensional general-relativistic magnetohydrodynamics with time-dependent Monte Carlo neutrino transport. We find that within 10 ⁴ GM _BH / c ³ (∼200–500 ms), the outflows from these disks are very close to the threshold conditions for robust rmore »« less
https://doi.org/10.3847/2041-8213/acba16

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Title: r -process nucleosynthesis from matter ejected in binary neutron star mergers [On r -process nucleosynthesis from matter ejected in binary neutron star mergers]

Abstract

Citation Formats

The third generation of gravitational wave observatories and their science reach journal, April 2010

Status of LCGT journal, April 2010

Properties of hypermassive neutron stars formed in mergers of spinning binaries journal, March 2015

Time-dependent models of accretion discs formed from compact object mergers journal, September 2008

Analytic Modeling of Tidal Effects in the Relativistic Inspiral of Binary Neutron Stars journal, December 2010

Low mass binary neutron star mergers: Gravitational waves and neutrino emission journal, February 2016

Erratum: Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling [Phys. Rev. Lett. 104 , 251101 (2010)] journal, December 2010

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

Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy journal, October 2017

Numerical integration of Einstein’s field equations journal, December 1998

Gamma-ray bursts as the death throes of massive binary stars journal, August 1992

New Finite-Range Droplet Mass Model and Equation-of-State Parameters journal, January 2012

Accurate Monotonicity-Preserving Schemes with Runge–Kutta Time Stepping journal, September 1997

Implementation of a simplified approach to radiative transfer in general relativity journal, September 2013

Three-dimensional evolution of differentially rotating magnetized neutron stars journal, September 2012

Binary neutron star mergers: a review of Einstein’s richest laboratory journal, July 2017

AN r -PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B journal, August 2013

Impact of Nuclear Mass Uncertainties on the r Process journal, March 2016

Magnetically Driven Winds from Differentially Rotating Neutron Stars and X-Ray Afterglows of Short Gamma-Ray Bursts journal, March 2014

Short Gamma-Ray Bursts from Dynamically Assembled Compact Binaries in Globular Clusters: Pathways, Rates, Hydrodynamics, and Cosmological Setting journal, August 2010

PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS journal, June 2014

Necessary Conditions for Short Gamma-Ray Burst Production in Binary Neutron star Mergers journal, May 2014

The Accuracy, Consistency, and Speed of Five Equations of State for Stellar Hydrodynamics journal, November 1999

[CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers journal, November 1999

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

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

Synthesis of the Elements in Stars journal, October 1957

Upper Limits on the Rates of Binary Neutron star and Neutron Star–Black hole Mergers from Advanced Ligo’S First Observing run journal, November 2016

Properties of Neutrino-driven Ejecta from the Remnant of a Binary Neutron Star Merger: Pure Radiation Hydrodynamics Case journal, September 2017

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

Afterglow of a Binary Neutron star Merger journal, June 2011

On Upstream Differencing and Godunov-Type Schemes for Hyperbolic Conservation Laws journal, January 1983

High-resolution calculations of merging neutron stars - II. Neutrino emission journal, July 2003

Local adaptive mesh refinement for shock hydrodynamics journal, May 1989

Advanced LIGO Constraints on Neutron Star Mergers and r-process Sites journal, February 2017

Status of the Virgo project journal, May 2011

Unequal mass binary neutron star mergers and multimessenger signals journal, September 2016

Transient Events from Neutron Star Mergers journal, November 1998

Neutron star-black hole mergers with a nuclear equation of state and neutrino cooling: Dependence in the binary parameters journal, July 2014

Electromagnetic Transients Powered by Nuclear Decay in the Tidal Tails of Coalescing Compact Binaries journal, July 2011

Calculations of fission rates for r-process nucleosynthesis journal, January 2005

Observation of Gravitational Waves from a Binary Black Hole Merger journal, February 2016

THC: a new high-order finite-difference high-resolution shock-capturing code for special-relativistic hydrodynamics journal, October 2012

GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2 journal, June 2017

The Missing Link: Merging Neutron Stars Naturally Produce Jet-Like Structures and can Power Short Gamma-Ray Bursts journal, April 2011

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

Compact Binary Progenitors of Short Gamma-Ray Bursts journal, December 2012

Neutron-induced astrophysical reaction rates for translead nuclei journal, April 2010

Core-Collapse Supernova Equations of State Based on Neutron star Observations journal, August 2013

Matplotlib: A 2D Graphics Environment journal, January 2007

Accurate evolutions of unequal-mass neutron-star binaries: properties of the torus and short GRB engines journal, May 2010

Magnetorotational Core-Collapse Supernovae in Three Dimensions journal, April 2014

Nucleosynthesis in Magnetically Driven Jets from Collapsars journal, June 2008

Protoneutron star evolution and the neutrino-driven wind in general relativistic neutrino radiation hydrodynamics simulations journal, July 2010

Multi-messenger Observations of a Binary Neutron Star Merger journal, October 2017

Modeling dynamical ejecta from binary neutron star mergers and implications for electromagnetic counterparts journal, April 2017

A generalized equation of state for hot, dense matter journal, December 1991

Neutron-Star Merger Ejecta as Obstacles to Neutrino-Powered jets of Gamma-Ray Bursts journal, January 2016

The long-term evolution of neutron star merger remnants – II. Radioactively powered transients journal, January 2014

Evolution of three-dimensional gravitational waves: Harmonic slicing case journal, November 1995

Neutrino Signatures and the Neutrino-Driven wind in Binary Neutron star Mergers journal, December 2008

The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models journal, October 2017

Kilonovae journal, May 2017

r -PROCESS NUCLEOSYNTHESIS IN DYNAMICALLY EJECTED MATTER OF NEUTRON STAR MERGERS journal, August 2011

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

The electromagnetic signals of compact binary mergers journal, February 2013

Astrophysical Reaction Rates From Statistical Model Calculations journal, May 2000

Neutrino-Driven Winds in the Aftermath of a Neutron star Merger: Nucleosynthesis and Electromagnetic Transients journal, October 2015

Rotational properties of hypermassive neutron stars from binary mergers journal, August 2017

Neutrino-Induced Nucleosynthesis of A > 64 Nuclei: The ν p Process journal, April 2006

Ultrarelativistic electromagnetic counterpart to binary neutron star mergers journal, October 2013

Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling journal, June 2010

Short Gamma-Ray Bursts in the “Time-Reversal” Scenario journal, December 2014

Nuclear Ground-State Masses and Deformations journal, March 1995

Dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity journal, March 2015

Evolution of accretion discs around a kerr black hole using extended magnetohydrodynamics journal, December 2015

Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron stars journal, July 1989

Title: $r$ -process nucleosynthesis from matter ejected in binary neutron star mergers [On $r$ -process nucleosynthesis from matter ejected in binary neutron star mergers]

The third generation of gravitational wave observatories and their science reach
journal, April 2010

Status of LCGT
journal, April 2010

Properties of hypermassive neutron stars formed in mergers of spinning binaries
journal, March 2015

Time-dependent models of accretion discs formed from compact object mergers
journal, September 2008

Analytic Modeling of Tidal Effects in the Relativistic Inspiral of Binary Neutron Stars
journal, December 2010

Low mass binary neutron star mergers: Gravitational waves and neutrino emission
journal, February 2016

Erratum: Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling [Phys. Rev. Lett. 104 , 251101 (2010)]
journal, December 2010

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

Symmetry Parameter Constraints from a Lower Bound on Neutron-matter Energy
journal, October 2017

Numerical integration of Einstein’s field equations
journal, December 1998

Gamma-ray bursts as the death throes of massive binary stars
journal, August 1992

New Finite-Range Droplet Mass Model and Equation-of-State Parameters
journal, January 2012

Accurate Monotonicity-Preserving Schemes with Runge–Kutta Time Stepping
journal, September 1997

Implementation of a simplified approach to radiative transfer in general relativity
journal, September 2013

Three-dimensional evolution of differentially rotating magnetized neutron stars
journal, September 2012

Binary neutron star mergers: a review of Einstein’s richest laboratory
journal, July 2017

AN r -PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B
journal, August 2013

Impact of Nuclear Mass Uncertainties on the $r$ Process
journal, March 2016

Magnetically Driven Winds from Differentially Rotating Neutron Stars and X-Ray Afterglows of Short Gamma-Ray Bursts
journal, March 2014

Short Gamma-Ray Bursts from Dynamically Assembled Compact Binaries in Globular Clusters: Pathways, Rates, Hydrodynamics, and Cosmological Setting
journal, August 2010

PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS
journal, June 2014

Necessary Conditions for Short Gamma-Ray Burst Production in Binary Neutron star Mergers
journal, May 2014

The Accuracy, Consistency, and Speed of Five Equations of State for Stellar Hydrodynamics
journal, November 1999

[CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers
journal, November 1999

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

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

Synthesis of the Elements in Stars
journal, October 1957

Upper Limits on the Rates of Binary Neutron star and Neutron Star–Black hole Mergers from Advanced Ligo’S First Observing run
journal, November 2016

Properties of Neutrino-driven Ejecta from the Remnant of a Binary Neutron Star Merger: Pure Radiation Hydrodynamics Case
journal, September 2017

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

Afterglow of a Binary Neutron star Merger
journal, June 2011

On Upstream Differencing and Godunov-Type Schemes for Hyperbolic Conservation Laws
journal, January 1983

High-resolution calculations of merging neutron stars - II. Neutrino emission
journal, July 2003

Local adaptive mesh refinement for shock hydrodynamics
journal, May 1989

Advanced LIGO Constraints on Neutron Star Mergers and r-process Sites
journal, February 2017

Status of the Virgo project
journal, May 2011

Unequal mass binary neutron star mergers and multimessenger signals
journal, September 2016

Transient Events from Neutron Star Mergers
journal, November 1998

Neutron star-black hole mergers with a nuclear equation of state and neutrino cooling: Dependence in the binary parameters
journal, July 2014

Electromagnetic Transients Powered by Nuclear Decay in the Tidal Tails of Coalescing Compact Binaries
journal, July 2011

Calculations of fission rates for r-process nucleosynthesis
journal, January 2005

Observation of Gravitational Waves from a Binary Black Hole Merger
journal, February 2016

THC: a new high-order finite-difference high-resolution shock-capturing code for special-relativistic hydrodynamics
journal, October 2012

GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
journal, June 2017

The Missing Link: Merging Neutron Stars Naturally Produce Jet-Like Structures and can Power Short Gamma-Ray Bursts
journal, April 2011

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

Compact Binary Progenitors of Short Gamma-Ray Bursts
journal, December 2012

Neutron-induced astrophysical reaction rates for translead nuclei
journal, April 2010

Core-Collapse Supernova Equations of State Based on Neutron star Observations
journal, August 2013

Matplotlib: A 2D Graphics Environment
journal, January 2007

Accurate evolutions of unequal-mass neutron-star binaries: properties of the torus and short GRB engines
journal, May 2010

Magnetorotational Core-Collapse Supernovae in Three Dimensions
journal, April 2014

Nucleosynthesis in Magnetically Driven Jets from Collapsars
journal, June 2008

Protoneutron star evolution and the neutrino-driven wind in general relativistic neutrino radiation hydrodynamics simulations
journal, July 2010

Multi-messenger Observations of a Binary Neutron Star Merger
journal, October 2017

Modeling dynamical ejecta from binary neutron star mergers and implications for electromagnetic counterparts
journal, April 2017

A generalized equation of state for hot, dense matter
journal, December 1991

Neutron-Star Merger Ejecta as Obstacles to Neutrino-Powered jets of Gamma-Ray Bursts
journal, January 2016

The long-term evolution of neutron star merger remnants – II. Radioactively powered transients
journal, January 2014

Evolution of three-dimensional gravitational waves: Harmonic slicing case
journal, November 1995

Neutrino Signatures and the Neutrino-Driven wind in Binary Neutron star Mergers
journal, December 2008

The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models
journal, October 2017

Kilonovae
journal, May 2017

r -PROCESS NUCLEOSYNTHESIS IN DYNAMICALLY EJECTED MATTER OF NEUTRON STAR MERGERS
journal, August 2011

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

The electromagnetic signals of compact binary mergers
journal, February 2013

Astrophysical Reaction Rates From Statistical Model Calculations
journal, May 2000

Neutrino-Driven Winds in the Aftermath of a Neutron star Merger: Nucleosynthesis and Electromagnetic Transients
journal, October 2015

Rotational properties of hypermassive neutron stars from binary mergers
journal, August 2017

Neutrino-Induced Nucleosynthesis of $A > 64$ Nuclei: The $ν p$ Process
journal, April 2006

Ultrarelativistic electromagnetic counterpart to binary neutron star mergers
journal, October 2013

Neutrino Signal of Electron-Capture Supernovae from Core Collapse to Cooling
journal, June 2010

Short Gamma-Ray Bursts in the “Time-Reversal” Scenario
journal, December 2014

Nuclear Ground-State Masses and Deformations
journal, March 1995

Dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity
journal, March 2015

Evolution of accretion discs around a kerr black hole using extended magnetohydrodynamics
journal, December 2015

Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron stars
journal, July 1989

Compact Object Coalescence rate Estimation from Short Gamma-Ray Burst Observations
journal, April 2013

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