Dynamical formation of the GW190814 merger

Abstract

We investigate the possible dynamical origin of GW190814, a gravitational wave (GW) source discovered by the LIGO-Virgo-Kagra collaboration (LVC) associated with a merger between a stellar black hole (BH) with mass $23.2$ M${}_{\odot }$ and a compact object, either a BH or a neutron star (NS), with mass $2.59$ M${}_{\odot }$. Using a database of 240,000 $N$-body simulations modelling the formation of NS-BH mergers via dynamical encounters in dense clusters, we find that systems like GW190814 are likely to form in young, metal-rich clusters. Our model suggests that a little excess ($\sim 2-4\%$) of objects with masses in the range $2.3-3$ M${}_{\odot }$ in the compact remnants mass spectrum leads to a detection rate for dynamically formed "GW190814 -like" mergers of ${\Gamma }_{GW190814}\simeq 1-6$ yr Gpc${}^{-3}$, i.e. within the observational constraints set by the GW190814 discovery, ${\Gamma }_{\mathrm{LVC}}\sim 1-23$ yr Gpc${}^{-3}$. Additionally, our model suggests that $\sim 1.8-4.8\%$ of dynamical NS-BH mergers are compatible with GW190426\_152155, the only confirmed NS-BH merger detected by the LVC. We show that the relative amount of light and heavy NS-BH mergers can provide clues about the environments in which they developed.

arXiv commentmain paper 7 pages, appendix 11 pages, 7 figures, 5 tables. Accepted for publication in ApJL

References in corpus (56)

• 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
• Young massive star clusters
• Predictions for the Rates of Compact Binary Coalescences Observable by Ground-based Gravitational-wave Detectors
• Compact Remnant Mass Function: Dependence on the Explosion Mechanism and Metallicity
• A Comprehensive Study of Binary Compact Objects as Gravitational Wave Sources: Evolutionary Channels, Rates, and Physical Properties
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• Double Compact Objects I: The Significance Of The Common Envelope On Merger Rates
• Binary Black Hole Mergers from Globular Clusters: Masses, Merger Rates, and the Impact of Stellar Evolution
• The Effects of Binary Evolution on the Dynamics of Core Collapse and Neutron-Star Kicks
• Kinematics in Young Star Clusters and Associations with Gaia DR2
• The progenitors of compact-object binaries: impact of metallicity, common envelope and natal kicks
• MOCCA-SURVEY Database I: Coalescing Binary Black Holes Originating From Globular Clusters
• Very massive stars, pair-instability supernovae and intermediate-mass black holes with the SEVN code
• On the Mass Distribution and Birth Masses of Neutron Stars
• The Mass Distribution of Stellar Black Holes
• The Dynamical Evolution of Stellar Black Holes in Globular Clusters
• Discovery of a Candidate Black Hole - Giant Star Binary System in the Galactic Field
• Merging black hole binaries with the SEVN code
• Post-Newtonian Dynamics in Dense Star Clusters: Highly-Eccentric, Highly-Spinning, and Repeated Binary Black Hole Mergers
• Post-Newtonian Dynamics in Dense Star Clusters: Formation, Masses, and Merger Rates of Highly-Eccentric Black Hole Binaries
• Revisiting the population of Galactic open clusters
• Dynamics of stellar black holes in young star clusters with different metallicities - II. Black hole-black hole binaries
• A detached stellar-mass black hole candidate in the globular cluster NGC 3201
• Dynamical evolution of black hole sub-systems in idealised star clusters
• Modeling Dense Star Clusters in the Milky Way and Beyond with the $\text{CMC}$ Cluster Catalog
• Eight New Millisecond Pulsars in NGC 6440 and NGC 6441
• Masses and Scaling Relations for Nuclear Star Clusters, and their Coexistence with Central Black Holes
• Where are LIGO's Big Black Holes?
• Implementing Few-Body Algorithmic Regularization with Post-Newtonian Terms
• Nuclear star clusters in 228 spiral galaxies in the HST/WFPC2 archive: catalogue and comparison to other stellar systems
• AGN Disks Harden the Mass Distribution of Stellar-mass Binary Black Hole Mergers
• Three-Dimensional Supernova Explosion Simulations of 9-, 10-, 11-, 12-, and 13-M${}_{\odot }$ Stars
• On the Rate of Neutron Star Binary Mergers from Globular Clusters
• Large scale kinematics and dynamical modelling of the Milky Way nuclear star cluster
• Impact of the Rotation and Compactness of Progenitors on the Mass of Black Holes
• Black hole, neutron star and white dwarf merger rates in AGN disks
• Exploring the Lower Mass Gap and Unequal Mass Regime in Compact Binary Evolution
• Constraining the masses of microlensing black holes and the mass gap with Gaia DR2
• Hierarchical Black-Hole Mergers in Multiple Systems: Constrain the Formation of GW190412, GW190814 and GW190521-like events
• MOCCA-SURVEY Database I. Unravelling black hole subsystems in globular clusters
• 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
• Towards absolute scales of radii and masses of open clusters
• Ultra-luminous X-ray sources and neutron-star-black-hole mergers from very massive close binaries at low metallicity
• Fingerprints of binary black hole formation channels encoded in the mass and spin of merger remnants
• GW190814: Spin and equation of state of a neutron star companion
• Dynamics of black hole - neutron star binaries in young star clusters
• The MEGaN project II. Gravitational waves from intermediate mass- and binary black holes around a supermassive black hole
• Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks
• On the formation of GW190814
• Black Hole-Neutron Star Mergers in Globular Clusters
• Dissecting the properties of neutron star - black hole mergers originating in dense star clusters
• Using final black hole spins and masses to infer the formation history of the observed population of gravitational wave sources
• Formation of mass gap objects in highly asymmetric mergers
• The Gaia-ESO Survey: Membership probabilities for stars in 32 open clusters from 3D kinematics
• Demographics of neutron stars in young massive and open clusters

Cited by in corpus (16)

• Rates of Compact Object Coalescences
• Observation of Gravitational Waves from the Coalescence of a $2.5\text{-}4.5M_{\odot }$ Compact Object and a Neutron Star
• Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations I: Black Hole-Neutron Star Mergers
• Quiescent and active galactic nuclei as factories of merging compact objects in the era of gravitational-wave astronomy
• Compact Binary Coalescences: Astrophysical Processes and Lessons Learned
• Eccentric black hole mergers via three-body interactions in young, globular, and nuclear star clusters
• Isolated and dynamical black hole mergers with \texttt{B-POP}: the role of star formation and dynamics, star cluster evolution, natal kicks, mass and spins, and hierarchical mergers
• Mass-gap extreme mass ratio inspirals
• Inferring spin tilts at formation from gravitational wave observations of binary black holes: Interfacing precession-averaged and orbit-averaged spin evolution
• Eccentricity signatures in LIGO-Virgo-KAGRA's BNS and NSBH binaries
• $f$-mode Imprints in Gravitational Waves from Coalescing Binaries involving Aligned Spinning Neutron Stars
• Ultra wide black-hole - neutron star binaries as a possible source for gravitational waves and short gamma ray bursts
• Possible binary neutron star merger history of the primary of GW230529
• Black Holes merging with Low Mass Gap Objects inside Globular Clusters
• Formation of the First Two Black Hole-Neutron Star Mergers (GW200115 and GW200105) from Isolated Binary Evolution
• Impact of Massive Binary Star and Cosmic Evolution on Gravitational Wave Observations II: Double Compact Object Rates and Properties