Potential Subpopulations and Assembling Tendency of the Merging Black Holes

Abstract

The origins of coalescing binary black holes (BBHs) detected by the advanced LIGO/Virgo are still under debate, and clues may be present in the joint mass-spin distribution of these merger events. Here we construct phenomenological models containing two sub-populations to investigate the BBH population detected in gravitational wave observations. We find that our models can explain the GWTC-3 data rather well, and several constraints to our model are required by the data: first, the maximum mass for the component with a stellar-origin, $m_{\max }$, is $39.1_{-2.7}^{+2.4}{M}_{\odot }$ at 90\% credibility; second, about $15\%$ of the mergers happen in dynamical environments, in which $7-16\%$ of events are hierarchical mergers, and these BHs have an average spin magnitude significantly larger than the first-generation mergers, with $\mathrm{d}{\mu }_{\mathrm{a}}>0.4$ at $99\%$ credibility; third, the dynamical component BHs tend to pair with each other with larger total mass and higher mass ratio. An independent analysis focusing on spins is also carried out, and we find that the spin amplitude of component BHs can be divided into two groups according to a division mass $m_{\mathrm{d}}=46.1_{-5.1}^{+5.6}{M}_{\odot }$. These constraints can be naturally explained by current formation channels, and our results suggest that some of the observed events were likely from AGN disks.

21 pages, 8 figures. Published in The Astrophysical Journal Letters

References in corpus (30)

• Pulsational Pair-Instability Supernovae
• The Effect of Pair-Instability Mass Loss on Black Hole Mergers
• Mind the gap: The location of the lower edge of the pair instability supernovae black hole mass gap
• Slowing the Spins of Stellar Cores
• Illuminating Black Hole Binary Formation Channels with Spins in Advanced LIGO
• Very massive stars, pair-instability supernovae and intermediate-mass black holes with the SEVN code
• One Channel to Rule Them All? Constraining the Origins of Binary Black Holes using Multiple Formation Pathways
• Where are LIGO's Big Black Holes?
• Stellar-mass black holes in young massive and open stellar clusters and their role in gravitational-wave generation
• AGN Disks Harden the Mass Distribution of Stellar-mass Binary Black Hole Mergers
• The Cosmic Evolution of Binary Black Holes in Young, Globular and Nuclear Star Clusters: Rates, Masses, Spins and Mixing Fractions
• Four eccentric mergers increase the evidence that LIGO--Virgo--KAGRA's binary black holes form dynamically
• Spectral sirens: cosmology from the full mass distribution of compact binaries
• Building better spin models for merging binary black holes: Evidence for non-spinning and rapidly spinning nearly aligned sub-populations
• The binary black hole spin distribution likely broadens with redshift
• The implications of high BH spins on the origin of BH-BH mergers
• Suspicious Siblings: The Distribution of Mass and Spin Across Component Black Holes in Isolated Binary Evolution
• No evidence that the majority of black holes in binaries have zero spin
• Evolution of Wolf-Rayet stars as black hole progenitors
• Limits on hierarchical black hole mergers from the most negative ${\chi }_{\mathrm{eff}}$ systems
• Spin it as you like: the (lack of a) measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes
• Measuring the properties of active galactic nuclei disks with gravitational waves
• The ${\chi }_{\mathrm{eff}}-z$ correlation of field binary black hole mergers and how 3G gravitational-wave detectors can constrain it
• When models fail: an introduction to posterior predictive checks and model misspecification in gravitational-wave astronomy
• Inferring the neutron star maximum mass and lower mass gap in neutron star-black hole systems with spin
• Tossing Black Hole Spin Axes
• A Channel to Form Fast-spinning Black Hole--Neutron Star Binary Mergers as Multi-messenger Sources
• Evidence for subdominant multipole moments and precession in merging black-hole-binaries from GWTC-2.1
• Divergence in mass ratio distributions between low-mass and high-mass coalescing binary black holes
• Implementation of a generalized precession parameter in the RIFT parameter estimation algorithm

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• McFacts III: Compact binary mergers from AGN disks over an entire synthetic universe
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• One to many: comparing single gravitational-wave events to astrophysical populations
• Exploring field-evolution and dynamical-capture coalescing binary black holes in GWTC-3
• Revealing the ${\chi }_{\mathrm{eff}}$-$q$ Correlation among Coalescing Binary Black Holes and Tentative Evidence for AGN-driven Hierarchical Mergers
• Gravitational-wave Observations Suggest Most Black Hole Mergers Form in Triples
• What's in a binary black hole's mass parameter?
• Do both black holes spin in merging binaries? Evidence from GWTC-4 and astrophysical implications
• The steep redshift evolution of the hierarchical binary black hole merger rate may cause the $z$-${\chi }_{\mathrm{eff}}$ correlation
• Multi-spectral Sirens: Gravitational-wave Cosmology with (Multi-) Sub-populations of Binary Black Holes
• Evidence of a fraction of LIGO/Virgo/KAGRA events coming from active galactic nuclei
• Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset
• The origin channels of hierarchical binary black hole mergers in the LIGO-Virgo-KAGRA O1, O2, and O3 runs
• Hierarchical triple mergers: testing Hawking's area theorem with the inspiral signals
• Measuring Mass and Radius of the Maximum-mass Nonrotating Neutron Star
• Probing Spin-Orbit Resonances with the Binary Black Hole Population
• Evidence for Three Subpopulations of Merging Binary Black Holes at Different Primary Masses
• The Nature of Gravitational Wave Events with Host Environment Escape Velocities
• Comparing astrophysical models to gravitational-wave data in the observable space
• Measurement prospects for the pair-instability mass cutoff with gravitational waves
• Gravitational-wave standard sirens and application in cosmology