Dynamics of black hole - neutron star binaries in young star clusters

Abstract

Young star clusters are likely the most common birthplace of massive stars across cosmic time and influence the formation of compact binaries in several ways. Here, we simulate the formation of black hole -- neutron star binaries (BHNSs) in young star clusters, by means of the binary population synthesis code \texttt{MOBSE} interfaced with the $N$-body code \texttt{NBODY6++GPU}. BHNSs formed in young star clusters (dynamical BHNSs) are significantly more massive than BHNSs formed from isolated binaries (isolated BHNSs): $\sim 40$~\% of the dynamical BHNS mergers have total mass $>15$ M${}_{\odot }$, while only $\sim 0.01$~\% of the isolated BHNS mergers have mass in excess of this value. Hence, our models strongly support a dynamical formation scenario for GW190814, given its total mass $\sim 26$ M${}_{\odot }$, if this event is a BHNS merger. All our dynamical BHNSs are ejected from their parent star cluster before they reach coalescence. Thus, a significant fraction of BHNS mergers occurring in the field might have originated in a young star cluster. The mass spectrum of BHNS mergers from gravitational-wave detections will provide a clue to differentiate between dynamical and isolated formation of BHNSs.

arXiv comment9 pages, 4 figures, 2 tables, resubmitted after addressing referee's comments

References in corpus (96)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Planck 2015 results. XIII. Cosmological parameters
• On the variation of the Initial Mass Function
• GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• Embedded Clusters in Molecular Clouds
• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• Binary interaction dominates the evolution of massive stars
• Evolution of binary stars and the effect of tides on binary populations
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Masses, Radii, and Equation of State of Neutron Stars
• GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
• Young massive star clusters
• Binary Black Hole Mergers in the first Advanced LIGO Observing Run
• Compact Remnant Mass Function: Dependence on the Explosion Mechanism and Metallicity
• Hyper-Accreting Black Holes and Gamma-Ray Bursts
• The formation of massive black holes through collision runaway in dense young star clusters
• Formation of Double Neutron Star Systems
• Black hole mergers in the universe
• On The Maximum Mass of Stellar Black Holes
• Binary Black Hole Mergers from Globular Clusters: Masses, Merger Rates, and the Impact of Stellar Evolution
• Formation Rates of Black Hole Accretion Disk Gamma-Ray Bursts
• Double Compact Objects III: Gravitational Wave Detection Rates
• Binary Black Hole Mergers from Globular Clusters: Implications for Advanced LIGO
• Kinematics in Young Star Clusters and Associations with Gaia DR2
• The progenitors of compact-object binaries: impact of metallicity, common envelope and natal kicks
• Very massive stars, pair-instability supernovae and intermediate-mass black holes with the SEVN code
• Black Holes: The Next Generation -- Repeated Mergers in Dense Star Clusters and their Gravitational-Wave Properties
• Radiation Backgrounds at Cosmic Dawn: X-Rays from Compact Binaries
• The maximum stellar mass, star-cluster formation and composite stellar populations
• Eccentric Black Hole Mergers Forming in Globular Clusters
• Evolution of Binary Compact Objects Which Merge
• Merging black hole binaries: the effects of progenitor's metallicity, mass-loss rate and Eddington factor
• Evidence for top-heavy stellar initial mass functions with increasing density and decreasing metallicity
• Massive black hole binaries from runaway collisions: the impact of metallicity
• Merging black hole binaries with the SEVN code
• Merging black holes in young star clusters
• Stellar-mass black holes in star clusters: implications for gravitational wave radiation
• Post-Newtonian Dynamics in Dense Star Clusters: Formation, Masses, and Merger Rates of Highly-Eccentric Black Hole Binaries
• Post-Newtonian Dynamics in Dense Star Clusters: Highly-Eccentric, Highly-Spinning, and Repeated Binary Black Hole Mergers
• Dynamics of stellar black holes in young star clusters with different metallicities - II. Black hole-black hole binaries
• The DRAGON simulations: globular cluster evolution with a million stars
• NBODY6++GPU: Ready for the gravitational million-body problem
• On the rarity of double black hole binaries: consequences for gravitational-wave detection
• The relation between the most-massive star and its parental star cluster mass
• The dynamical evolution of fractal star clusters: the survival of substructure
• The cosmic merger rate of neutron stars and black holes
• Mass segregation and fractal substructure in young massive clusters: (I) the McLuster code and method calibration
• The cosmic merger rate of stellar black hole binaries from the Illustris simulation
• Black hole mergers from an evolving population of globular clusters
• Stellar-mass black holes in young massive and open stellar clusters and their role in gravitational-wave generation
• The mass distribution of Galactic double neutron stars
• Stellar-mass black holes in young massive and open stellar clusters and their role in gravitational-wave generation II
• On the Rate of Neutron Star Binary Mergers from Globular Clusters
• Dynamics and Interactions of Binaries and Neutron Stars in Globular Clusters
• Impact of the Rotation and Compactness of Progenitors on the Mass of Black Holes
• Binary compact object coalescence rates: The role of elliptical galaxies
• The properties of merging black holes and neutron stars across cosmic time
• Binary black holes in the pair-instability mass gap
• The Complete Evolution of a Neutron-Star Binary through a Common Envelope Phase Using 1D Hydrodynamic Simulations
• Dynamics, nucleosynthesis, and kilonova signature of black hole - neutron star merger ejecta
• The impact of electron-capture supernovae on merging double neutron stars
• The spatial distribution of stars in open clusters
• Revising natal kick prescriptions in population synthesis simulations
• GROWTH on S190814bv: Deep Synoptic Limits on the Optical/Near-Infrared Counterpart to a Neutron Star-Black Hole Merger
• Gravitational-wave detection rates for compact binaries formed in isolation: LIGO/Virgo O3 and beyond
• Mergers and ejections of black holes in globular clusters
• Host galaxies of merging compact objects: mass, star formation rate, metallicity and colours
• Black hole-neutron star mergers from triples
• Binary Black Hole Mergers from Globular Clusters: the Impact of Globular Cluster Properties
• Dynamical evolution of stellar-mass black holes in dense stellar clusters: estimate for merger rate of binary black holes originating from globular clusters
• Gravitational-Wave Emission from Binary Black Holes Formed in Open Clusters
• Black Hole-Neutron Star Mergers in Globular Clusters
• Constraining the fraction of binary black holes formed in isolation and young star clusters with gravitational-wave data
• Stellar Black Hole Binary Mergers in Open Clusters
• Relativistic Binary Pulsars with Black-Hole Companions
• Merger rate density of binary black holes formed in open clusters
• Dependence of Gravitational Wave Transient Rates on Cosmic Star Formation and Metallicity Evolution History
• Black-hole remnants from black-hole--neutron-star mergers
• The star clusters that make black hole binaries across cosmic time
• The Detection Rates of Merging Binary Black Holes Originating from Star Clusters and Their Mass Function
• Evolution of fractality and rotation in embedded star clusters
• The Effect of Distant Encounters on Black Hole Binaries in Globular Clusters: Systematic Increase of In-cluster Mergers in the LISA band
• Impact of metallicity on the evolution of young star clusters
• Early-type Eclipsing Binaries with Intermediate Orbital Periods
• Filling the Mass Gap: How Kilonova Observations can Unveil the Nature of the Compact Object Merging with the Neutron Star
• The Role of "Black Hole Burning" in the Evolution of Dense Star Clusters
• On the Bimodal Distribution of Gamma-Ray Bursts
• Millisecond pulsars around intermediate-mass black holes in globular clusters
• Black hole-neutron star mergers from triples II: the role of metallicity and spin-orbit misalignment
• Contribution of High-Mass Black Holes to Mergers of Compact Binaries
• Dynamically formed black hole+millisecond pulsar binaries in globular clusters
• Nova Sco and coalescing low mass black hole binaries as LIGO sources
• Mergers of globular clusters in the Galactic disc: intermediate mass black hole coalescence and implications for gravitational waves detection

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• The cosmic merger rate density of compact objects: impact of star formation, metallicity, initial mass function and binary evolution
• Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations I: Black Hole-Neutron Star Mergers
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• Stellar-mass black holes in young massive and open stellar clusters IV: updated stellar-evolutionary and black hole spin models and comparisons with the LIGO-Virgo O1/O2 merger-event data
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• Gravitational wave sources in our Galactic backyard: Predictions for BHBH, BHNS and NSNS binaries detectable with LISA
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• Neutron Star-Black Hole Mergers from Gravitational Wave Captures
• The role of core-collapse physics in the observability of black-hole neutron-star mergers as multi-messenger sources
• Spin misalignment of black hole binaries from young star clusters: implications for the origin of gravitational waves events
• Stellar-mass black holes in young massive and open stellar clusters V: comparisons with LIGO-Virgo merger rate densities
• Dynamics of binary black holes in young star clusters: the impact of cluster mass and long-term evolution
• Demographics of neutron stars in young massive and open clusters
• Mass-gap extreme mass ratio inspirals
• Constraints on compact binary merger evolution from spin-orbit misalignment in gravitational-wave observations
• Neutron star-black hole mergers in next generation gravitational-wave observatories
• Stable mass transfer can explain massive binary black hole mergers with a high spin component
• Impact of natal kicks on merger rates and spin-orbit misalignments of black hole -- neutron star mergers
• Dynamical formation of the GW190814 merger
• Orbital eccentricity in a neutron star - black hole merger
• From hydrodynamics to N-body simulations of star clusters: mergers and rotation
• Using Gray Sirens to Resolve the Hubble-Lemaître Tension
• Explodability fluctuations of massive stellar cores enable asymmetric compact object mergers such as GW190814
• Search for eccentric NSBH and BNS mergers in the third observing run of Advanced LIGO and Virgo
• Possible binary neutron star merger history of the primary of GW230529
• Rubin Observatory LSST Stars Milky Way and Local Volume Star Clusters Roadmap
• Dynamical disruption timescales and chaotic behavior of hierarchical triple systems
• New insights on binary black hole formation channels after GWTC-2: young star clusters versus isolated binaries
• Classifying binary black holes from Population III stars with the Einstein Telescope: A machine-learning approach
• Black Holes merging with Low Mass Gap Objects inside Globular Clusters
• Neutron Stars in the Effective Fly-By Framework: $f$-Mode Re-summation
• Constraining neutron star radii in black hole-neutron star mergers from their electromagnetic counterparts
• On the large apparent black hole spin-orbit misalignment angle in GW200115
• The initial mass-remnant mass relation for core collapse supernovae
• Formation of the First Two Black Hole-Neutron Star Mergers (GW200115 and GW200105) from Isolated Binary Evolution
• Astrophysics with the Laser Interferometer Space Antenna
• Population Synthesis of Black Hole Binaries with Compact Star Companions
• Probing cosmic chemical enrichment with next-generation gravitational-wave observatories
• Recent LIGO-Virgo discoveries
• Introducing a new multi-particle collision method for the evolution of dense stellar systems. Crash-test N-body simulations
• Testing modified gravity with the eccentric neutron star--black hole merger GW200105
• Black Hole - Neutron Star and Binary Neutron Star Mergers from Population III and II stars
• Signatures of Hierarchical Mergers in Black Hole Spin and Mass distribution
• Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations II: Double Compact Object Rates and Properties
• Modelling the formation of the first two neutron star-black hole mergers, GW200105 and GW200115: metallicity, chirp masses and merger remnant spins
• Host galaxies and electromagnetic counterparts to binary neutron star mergers across the cosmic time: Detectability of GW170817-like events
• Gravitational background from dynamical binaries and detectability with 2G detectors