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The Relative Contribution to Heavy Metals Production from Binary Neutron Star Mergers and Neutron Star–Black Hole Mergers

Journal Article · · The Astrophysical Journal. Letters
 [1];  [2];  [3]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). LIGO Laboratory; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Kavli Institute for Astrophysics and Space Research; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). LIGO Laboratory; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Kavli Institute for Astrophysics and Space Research
  3. University of New Hampshire, Durham, NH (United States)
The origin of the heavy elements in the universe is not fully determined. Neutron star–black hole (NSBH) and binary neutron star (BNS) mergers may both produce heavy elements via rapid neutron-capture (r-process). We use the recent detection of gravitational waves from NSBHs, improved measurements of the neutron star equation of state (EoS), and the most modern numerical simulations of ejected material from binary collisions to measure the relative contribution of NSBHs and BNSs to the production of heavy elements. As the amount of r-process ejecta depends on the mass and spin distribution of the compact objects, as well as on the EoS of the neutron stars, we consider various models for these quantities, informed by gravitational-wave and pulsar data. We find that in most scenarios, BNSs have produced more r-process elements than NSBHs over the past 2.5 billion years. If black holes have preferentially small spins, BNSs can produce at least twice the amount of r-process elements than NSBHs. If black hole spins are small and there is a dearth of low-mass (<5M) black holes within NSBH binaries, BNSs can account for the near totality of the r-process elements from binaries. For NSBH to produce a large fraction of r-process elements, black holes in NSBHs must have small masses and large aligned spins, which is disfavored by current data.
Research Organization:
University of New Hampshire, Durham, NH (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
SC0020435
OSTI ID:
1981271
Journal Information:
The Astrophysical Journal. Letters, Journal Name: The Astrophysical Journal. Letters Journal Issue: 1 Vol. 920; ISSN 2041-8205
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (70)

Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA journal April 2018
Kilonovae journal December 2019
The r-process signature found in the ultra-faint dwarf galaxy Reticulum II journal November 2019
Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo journal January 2021
R-process enrichment from a single event in an ancient dwarf galaxy journal March 2016
Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar journal September 2019
Collapsars as a major source of r-process elements journal May 2019
r-Process elements from magnetorotational hypernovae journal July 2021
The tidal disruption of neutron stars by black holes in close binaries journal November 1976
Black-hole-neutron-star collisions journal September 1974
Neutron Star Structure and the Equation of State journal March 2001
Experimental Limit to Interstellar [TSUP]244[/TSUP]P[CLC]u[/CLC] Abundance journal September 2001
Nucleosynthesis in the Outflow from Gamma‐Ray Burst Accretion Disks journal June 2006
DETECTION OF ELEMENTS AT ALL THREE r -PROCESS PEAKS IN THE METAL-POOR STAR HD 160617 , , journal April 2012
Mass Measurements of Black Holes in X-Ray Transients: is There a mass gap? journal September 2012
OPACITIES AND SPECTRA OF THE r -PROCESS EJECTA FROM NEUTRON STAR MERGERS journal August 2013
Double Compact Objects. ii. Cosmological Merger Rates journal November 2013
r-PROCESS LANTHANIDE PRODUCTION AND HEATING RATES IN KILONOVAE journal December 2015
Modeling dynamical ejecta from binary neutron star mergers and implications for electromagnetic counterparts journal April 2017
MAGNETOROTATIONALLY DRIVEN SUPERNOVAE AS THE ORIGIN OF EARLY GALAXY r -PROCESS ELEMENTS? journal April 2012
PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS journal June 2014
The landscape of disc outflows from black hole–neutron star mergers journal July 2020
On the formation of GW190814 journal November 2020
Hierarchical black hole mergers in multiple systems: constrain the formation of GW190412-, GW190814-, and GW190521-like events journal January 2021
Delayed outflows from black hole accretion tori following neutron star binary coalescence journal August 2013
Red or blue? A potential kilonova imprint of the delay until black hole formation following a neutron star merger journal May 2014
Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers journal February 2015
Evidence for a maximum mass cut-off in the neutron star mass distribution and constraints on the equation of state journal April 2018
The role of magnetic field geometry in the evolution of neutron star merger accretion discs journal September 2019
Extracting distribution parameters from multiple uncertain observations with selection biases journal March 2019
Parallelized inference for gravitational-wave astronomy journal August 2019
Estimates for disk and ejecta masses produced in compact binary mergers journal May 2020
Viscous evolution of a massive disk surrounding stellar-mass black holes in full general relativity journal December 2020
Bayesian analysis of neutrinos observed from supernova SN 1987A journal February 2002
Mass ejection from the merger of binary neutron stars journal January 2013
Black-hole–neutron-star mergers at realistic mass ratios: Equation of state and spin orientation effects journal April 2013
Dynamical mass ejection from black hole-neutron star binaries journal August 2015
High resolution magnetohydrodynamic simulation of black hole-neutron star merger: Mass ejection and short gamma ray bursts journal September 2015
Gravitational waves and mass ejecta from binary neutron star mergers: Effect of the mass ratio journal January 2017
Remnant baryon mass in neutron star-black hole mergers: Predictions for binary neutron star mimickers and rapidly spinning black holes journal October 2018
Gravitational-wave astrophysics with effective-spin measurements: Asymmetries and selection biases journal October 2018
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral journal October 2017
Three-Dimensional General-Relativistic Magnetohydrodynamic Simulations of Remnant Accretion Disks from Neutron Star Mergers: Outflows and r -Process Nucleosynthesis journal December 2017
GW170817: Measurements of Neutron Star Radii and Equation of State journal October 2018
Electromagnetic counterparts of compact object mergers powered by the radioactive decay of r-process nuclei: Transients from compact object mergers journal June 2010
On the astrophysical robustness of the neutron star merger r-process: Robust r-process in neutron star mergers journal October 2012
Swope Supernova Survey 2017a (SSS17a), the optical counterpart to a gravitational wave source journal October 2017
60 Fe and 244 Pu deposited on Earth constrain the r-process yields of recent nearby supernovae journal May 2021
129 I and 247 Cm in meteorites constrain the last astrophysical source of solar r-process elements journal February 2021
Masses, Radii, and the Equation of State of Neutron Stars journal September 2016
The Dense Matter Equation of State from Neutron star Radius and mass Measurements journal March 2016
Neutron star Mass–Radius Constraints of the Quiescent Low-Mass X-Ray Binaries x7 and x5 in the Globular Cluster 47 tuc journal November 2016
r -process Nucleosynthesis from Three-dimensional Magnetorotational Core-collapse Supernovae journal September 2018
Full Transport General Relativistic Radiation Magnetohydrodynamics for Nucleosynthesis in Collapsars journal October 2020
Numerical Relativity Simulations of the Neutron Star Merger GW170817: Long-term Remnant Evolutions, Winds, Remnant Disks, and Nucleosynthesis journal January 2021
A Broad Grid of 2D Kilonova Emission Models journal August 2021
The R -Process Alliance: Fourth Data Release from the Search for R -process-enhanced Stars in the Galactic Halo journal August 2020
Multi-messenger Observations of a Binary Neutron Star Merger journal October 2017
Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817 journal December 2017
Hypermassive Neutron Star Disk Outflows and Blue Kilonovae journal December 2018
Revisiting the Lower Bound on Tidal Deformability Derived by AT 2017gfo journal May 2019
A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation journal December 2019
PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter journal December 2019
Constraining the Dense Matter Equation of State with Joint Analysis of NICER and LIGO/Virgo Measurements journal April 2020
Population Properties of Compact Objects from the Second LIGO–Virgo Gravitational-Wave Transient Catalog journal May 2021
Observation of Gravitational Waves from Two Neutron Star–Black Hole Coalescences journal June 2021
Constraints on the Dense Matter Equation of State and Neutron Star Properties from NICER’s Mass–Radius Estimate of PSR J0740+6620 and Multimessenger Observations journal September 2021
The Radius of PSR J0740+6620 from NICER and XMM-Newton Data journal September 2021
A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy journal September 2021
A Population-Informed Mass Estimate for Pulsar J0740+6620 journal May 2020

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