Kilonovae across the nuclear physics landscape: The impact of nuclear physics uncertainties on r-process-powered emission

Abstract

Merging neutron stars produce "kilonovae"---electromagnetic transients powered by the decay of unstable nuclei synthesized via rapid neutron capture (the r-process) in material that is gravitationally unbound during inspiral and coalescence. Kilonova emission, if accurately interpreted, can be used to characterize the masses and compositions of merger-driven outflows, helping to resolve a long-standing debate about the origins of r-process material in the Universe. We explore how the uncertain properties of nuclei involved in the r-process complicate the inference of outflow properties from kilonova observations. Using r-process simulations, we show how nuclear physics uncertainties impact predictions of radioactive heating and element synthesis. For a set of models that span a large range in both predicted heating and final abundances, we carry out detailed numerical calculations of decay product thermalization and radiation transport in a kilonova ejecta with a fixed mass and density profile. The light curves associated with our models exhibit great diversity in their luminosities, with peak brightness varying by more than an order of magnitude. We also find variability in the shape of the kilonova light curves and their color, which in some cases runs counter to the expectation that increasing levels of lanthanide and/or actinide enrichment will be correlated with longer, dimmer, redder emission.

arXiv commentSubmitted to ApJ; comments welcome

References in corpus (102)

• Multi-messenger Observations of a Binary Neutron Star Merger
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• Nuclear ground-state masses and deformations: FRDM(2012)
• Transient Events from Neutron Star Mergers
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Electromagnetic Counterparts of Compact Object Mergers Powered by the Radioactive Decay of R-process Nuclei
• Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
• INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
• The X-ray counterpart to the gravitational wave event GW 170817
• A kilonova as the electromagnetic counterpart to a gravitational-wave source
• Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
• Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger
• Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
• Core-collapse supernova equations of state based on neutron star observations
• Nucleosynthesis in neutrino-driven winds: I. The physical conditions
• Microscopic mass formulae
• Production of all the r-process nuclides in the dynamical ejecta of neutron star mergers
• Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
• On the astrophysical robustness of neutron star merger r-process
• Effect of a High Opacity on the Light Curves of Radioactively Powered Transients from Compact Object Mergers
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. I. Dark Energy Camera Discovery of the Optical Counterpart
• Swift and NuSTAR observations of GW170817: detection of a blue kilonova
• The Combined Ultraviolet, Optical, and Near-Infrared Light Curves of the Kilonova Associated with the Binary Neutron Star Merger GW170817: Unified Data Set, Analytic Models, and Physical Implications
• Opacities and Spectra of the r-process Ejecta from Neutron Star Mergers
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. IV. Detection of Near-infrared Signatures of r-process Nucleosynthesis with Gemini-South
• Systematics of dynamical mass ejection, nucleosynthesis, and radioactively powered electromagnetic signals from neutron-star mergers
• Magnetorotationally driven Supernovae as the origin of early galaxy $r$-process elements?
• The mass ejection from the merger of binary neutron stars
• R-Process Nucleosynthesis in Dynamically Ejected Matter of Neutron Star Mergers
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. III. Optical and UV Spectra of a Blue Kilonova From Fast Polar Ejecta
• Identification of strontium in the merger of two neutron stars
• Radiative Transfer Simulations for Neutron Star Merger Ejecta
• The impact of individual nuclear properties on $r$-process nucleosynthesis
• Nuclear energy density optimization: Large deformations
• Red or blue? A potential kilonova imprint of the delay until black hole formation following a neutron star merger
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. V. Rising X-ray Emission from an Off-Axis Jet
• Collapsars as a major source of r-process elements
• Neutron star mergers versus core-collapse supernovae as dominant r-process sites in the early Galaxy
• Time Dependent Monte Carlo Radiative Transfer Calculations For 3-Dimensional Supernova Spectra, Lightcurves, and Polarization
• Early Spectra of the Gravitational Wave Source GW170817: Evolution of a Neutron Star Merger
• Radioactivity and thermalization in the ejecta of compact object mergers and their impact on kilonova light curves
• Kilonova from post-merger ejecta as an optical and near-infrared counterpart of GW170817
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. VI. Radio Constraints on a Relativistic Jet and Predictions for Late-Time Emission from the Kilonova Ejecta
• Electromagnetic Transients Powered by Nuclear Decay in the Tidal Tails of Coalescing Compact Binaries
• The dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity
• Dynamical mass ejection from the merger of asymmetric binary neutron stars: Radiation-hydrodynamics study in general relativity
• Large scale evaluation of beta-decay rates of r-process nuclei with the inclusion of first-forbidden transitions
• Electromagnetic Evidence that SSS17a is the Result of a Binary Neutron Star Merger
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• Relativistic neutron star merger simulations with non-zero temperature equations of state I. Variation of binary parameters and equation of state
• AT2017gfo: an anisotropic and three-component kilonova counterpart of GW170817
• Systematic Opacity Calculations for Kilonovae
• Neutron Star Mergers Might not be the Only Source of r-Process Elements in the Milky Way
• r-Process Lanthanide Production and Heating Rates in Kilonovae
• The long-term evolution of neutron star merger remnants - II. Radioactively powered transients
• The Origin of r-Process Elements in the Milky Way
• Impact of ejecta morphology and composition on the electromagnetic signatures of neutron star mergers
• Three-dimensional GRMHD simulations of neutrino-cooled accretion disks from neutron star mergers
• Further improvements on a global nuclear mass model
• r-Process Nucleosynthesis in Hot Accretion Disk Flows from Black Hole - Neutron Star Mergers
• Fission barriers of neutron-rich and superheavy nuclei calculated with the ETFSI method
• Dynamical mass ejection from black hole-neutron star binaries
• Constraints on the ejecta of the GW170817 neutron-star merger from its electromagnetic emission
• Full Transport Model of GW170817-Like Disk Produces a Blue Kilonova
• R-process Nucleosynthesis from Three-Dimensional Magnetorotational Core-Collapse Supernovae
• Unequal mass binary neutron star mergers and multimessenger signals
• Detectability of compact binary merger macronovae
• The Nuclear Science References (NSR) Database and Web Retrieval System
• The Rapid Reddening and Featureless Optical Spectra of the optical counterpart of GW170817, AT 2017gfo, During the First Four Days
• Supernovae versus Neutron Star Mergers as the Major r-Process Sources
• Anisotropic mass ejection from black hole-neutron star binaries: Diversity of electromagnetic counterparts
• Radioactive decay products in neutron star merger ejecta: heating efficiency and $\gamma$-ray emission
• A line-binned treatment of opacities for the spectra and light curves from neutron star mergers
• Fingerprints of heavy element nucleosynthesis in the late-time lightcurves of kilonovae
• A Neutron Star Binary Merger Model for GW170817/GRB170817a/SSS17a
• Spitzer Mid-Infrared Detections of Neutron Star Merger GW170817 Suggests Synthesis of the Heaviest Elements
• Axisymmetric Radiative Transfer Models of Kilonovae
• Neutrino oscillations above black hole accretion disks: disks with electron-flavor emission
• Gravitational waves and mass ejecta from binary neutron star mergers: Effect of the stars' rotation
• The impact of individual nuclear masses on $r$-process abundances
• Modeling Kilonova Light Curves: Dependence on Nuclear Inputs
• Radioactive heating rate of r-process elements and macronova light curve
• Californium-254 and kilonova light curves
• Eccentric black hole-neutron star mergers: effects of black hole spin and equation of state
• Using excitation-energy dependent fission yields to identify key fissioning nuclei in r-process nucleosynthesis
• Supernova Fallback: A Possible Site for the r-Process
• Actinide Production in Neutron-Rich Ejecta of a Neutron Star Merger
• The Hamburg/ESO R-process Enhanced Star survey (HERES) X. HE 2252-4225, one more r-process enhanced and actinide-boost halo star
• Radioactive Heating and Late Time Kilonova Light Curves
• Primary fission fragment mass yields across the chart of nuclides
• A Long, Cold, Early r-process? Neutrino-induced Nucleosynthesis in He Shells Revisited
• The lanthanide fraction distribution in metal-poor stars: a test of neutron star mergers as the dominant r-process site
• Prospects for obtaining an r-process from Gamma Ray Burst Disk Winds
• Composition Effects on Kilonova Spectra and Light Curves: I
• Fission Cycling in a Supernova r-process
• Analytic heating rate of neutron star merger ejecta derived from Fermi's theory of beta decay
• Astromers in the radioactive decay of r-process nuclei
• Late time kilonova light curves and implications to GW 170817
• $\beta$-Decay Half-Lives of 55 Neutron-Rich Isotopes beyond the N=82 Shell Gap
• The impact of isomers on a kilonova associated with neutron star mergers
• Reconstructing Masses of Merging Neutron Stars from Stellar $R$-Process Abundance Signatures

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• The critical role of nuclear heating rates, thermalization efficiencies and opacities for kilonova modelling and parameter inference
• The Challenges Ahead for Multimessenger Analyses of Gravitational Waves and Kilonova: a Case Study on GW190425
• The Fast Flavor Instability in Hypermassive Neutron Star Disk Outflows
• Kilonova Detectability with Wide-Field Instruments
• On the Validity of Steady-State for Nebular Phase Kilonovae
• Horizons: Nuclear Astrophysics in the 2020s and Beyond
• Nucleosynthesis and observation of the heaviest elements
• Estimating outflow masses and velocities in merger simulations: impact of r-process heating and neutrino cooling
• NLTE Spectra of Kilonovae
• Dynamical ejecta of neutron star mergers with nucleonic weak processes II: Kilonova emission
• Radiation hydrodynamics modeling of kilonovae with SNEC
• "Super-Kilonovae" from Massive Collapsars as Signatures of Black-Hole Birth in the Pair-instability Mass Gap
• On the diversity of magnetar-driven kilonovae
• Signatures of R-process Enrichment in Supernovae from Collapsars
• The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks
• Spectroscopic r-Process Abundance Retrieval for Kilonovae I: The Inferred Abundance Pattern of Early Emission from GW170817
• r-Process Radioisotopes from Near-Earth Supernovae and Kilonovae
• Impact of systematic nuclear uncertainties on composition and decay heat of dynamical and disk ejecta in compact binary mergers
• The Influence of Beta Decay Rates on r-Process Observables
• Electromagnetic counterparts of binary neutron star mergers leading to a strongly magnetized long-lived remnant neutron star
• Bayesian inference of multimessenger astrophysical data: Joint and coherent inference of gravitational waves and kilonovae
• Eighteen Years of Kilonova Discoveries with Swift
• Interpolating Detailed Simulations of Kilonovae: Adaptive Learning and Parameter Inference Applications
• Superheavy Elements in Kilonovae
• Surrogate light curve models for kilonovae with comprehensive wind ejecta outflows and parameter estimation for AT2017gfo
• Fallback Accretion Halted by R-process Heating in Neutron Star Mergers and Gamma-Ray Bursts
• Chemical Evolution of R-process Elements in Stars (CERES): IV. An observational run-up of the third r-process peak with Hf, Os, Ir, and Pt
• Neutrino Flavor Transformation in Neutron Star Mergers
• The luminosity functions of kilonovae from binary neutron star mergers under different equation of states
• Actinide signatures in low electron fraction kilonova ejecta
• Cautionary tales on heating-rate prescriptions in kilonovae
• Isochronic evolution and the radioactive decay of r-process nuclei
• The thermalization of $\gamma$-rays in radioactive expanding ejecta: A simple model and its application for Kilonovae and Ia SNe
• A Nuclear Equation of State Inferred from Stellar r-process Abundances
• XKN: a Semi-analytic Framework for the Modelling of Kilonovae
• KilonovAE: Exploring Kilonova Spectral Features with Autoencoders
• Inferring kilonova population properties with a hierarchical Bayesian framework I : Non-detection methodology and single-event analyses
• Alpha decay of thermally excited nuclei
• Let there be neutrons! Hadronic photoproduction from a large flux of high-energy photons
• The white dwarf binary merger model of GRB 170817A
• Magnetic Field Strength Effects on Nucleosynthesis from Neutron Star Merger Outflows
• An Analytic Description of Electron Thermalization in Kilonovae Ejecta
• Interpolated kilonova spectra models: necessity for a phenomenological, blue component in the fitting of AT2017gfo spectra
• Data-driven approach for modeling the temporal and spectral evolution of kilonova systematic uncertainties
• Impact of in situ nuclear networks and atomic opacities on neutron star merger ejecta dynamics, nucleosynthesis, and kilonovae
• Plasma Instabilities Dominate Radioactive Transients Magnetic Fields: The self-confinement of leptons in Type Ia and Core-Collapse Supernovae, and Kilonovae
• Particle In Cell Simulations of Mildly Relativistic Outflows in Kilonova Emissions