Dynamics and spin alignment in massive, gravito-turbulent circumbinary discs around supermassive black hole binaries

Abstract

Parsec-scale separation supermassive black hole binaries in the centre of gas-rich galaxy merger remnants could be surrounded by massive circumbinary discs (CBDs). Black hole mass and spin evolution during the gas-rich binary inspiral are crucial in determining the direction and power of relativistic jets that radio observations with LOFAR and SKAO will probe, and for predicting gravitational wave (GW) emission that IPTA and LISA will measure. We present 3D hydrodynamic simulations capturing gas-rich, self-gravitating CBDs around a $2\times 10^6$ M${}_{\odot }$ supermassive black hole binary, that probe different mass ratios, eccentricities and inclinations. We employ a sub-grid Shakura-Sunyaev accretion disc to self-consistently model black hole mass and spin evolution together with super-Lagrangian refinement techniques to resolve gas flows, streams and mini-discs within the cavity, which play a fundamental role in torquing and feeding the binary. We find that higher mass ratio and eccentric binaries result in larger cavities, while retrograde binaries result in smaller cavities. All of the simulated binaries are expected to shrink with net gravitational torques being negative. Unlike previous simulations, we do not find preferential accretion onto the secondary black hole. This implies smaller chirp masses at coalescence and hence a weaker GW background. Critically this means that spin-alignment is faster than the binary inspiral timescale even for low mass ratios. When considering initially misaligned systems, the orientation of the mini-discs around each black hole can vary significantly. We discuss the implications of this behaviour for black hole spin alignment and highlight the need for broader parameter space studies of misaligned systems to understand the impact on black hole recoil velocities.

30 pages, 16 figures, accepted for publication in MNRAS

References in corpus (66)

• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Laser Interferometer Space Antenna
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• The effect of galaxy mass ratio on merger--driven starbursts
• The Evolution of Galaxy Structure over Cosmic Time
• A Compact Supermassive Binary Black Hole System
• Massive black hole binary mergers within sub-pc scale gas discs
• Supermassive recoil velocities for binary black-hole mergers with antialigned spins
• Kinematic Structure of Merger Remnants
• Rapid Formation of Supermassive Black Hole Binaries in Galaxy Mergers with Gas
• Alignment of the spins of supermassive black holes prior to coalescence
• The Evolution of Black Hole Mass and Spin in Active Galactic Nuclei
• Gravitational waves from resolvable massive black hole binary systems and observations with Pulsar Timing Arrays
• Supermassive black hole binaries in gaseous and stellar circumnuclear discs: orbital dynamics and gas accretion
• The Nearly Universal Merger Rate of Dark Matter Haloes in Lambda-CDM Cosmology
• Equal- and unequal-mass mergers of disk and elliptical galaxies with black holes
• Galaxy growth in the concordance $\Lambda$CDM cosmology
• Interaction of massive black hole binaries with their stellar environment: I. Ejection of hypervelocity stars
• Growth and activity of black holes in galaxy mergers with varying mass ratios
• Viscous Hydrodynamics Simulations of Circumbinary Accretion Discs: Variability, Quasi-Steady State, and Angular Momentum Transfer
• Cavity opening by a giant planet in a protoplanetary disc and effects on planetary migration
• Dynamics of triple black hole systems in hierarchically merging massive galaxies
• Fuelling Active Galactic Nuclei
• Massive binary black holes in galactic nuclei and their path to coalescence
• Black-Hole Spin and Galactic Morphology
• The NANOGrav 15-year Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries
• Hydrodynamic Torques in Circumbinary Accretion Disks
• Circumbinary Accretion from Finite and Infinite Disks
• Dissipationless Mergers of Elliptical Galaxies and the Evolution of the Fundamental Plane
• Black Hole Mass Scaling Relations for Early-Type Galaxies: $M_{BH}$-$M_{\ast ,sph}$ and $M_{BH}$-$M_{\ast ,gal}$
• Misaligned gas discs around eccentric black-hole binaries and implications for the final-parsec problem
• Effects of gravitational-wave recoil on the dynamics and growth of supermassive black holes
• X-ray Detected AGN in SDSS Dwarf Galaxies
• Constraining the Orbit of Supermassive Black Hole Binary 0402+379
• A candidate sub-parsec binary black hole in the Seyfert galaxy NGC 7674
• Orbital Evolution of Binaries in Circumbinary Disks
• Shocks and angular momentum flips: a different path to feeding the nuclear regions of merging galaxies
• Alignment and Precession of a Black Hole with a Warped Accretion Disc
• The Argo Simulation: II. The Early Build-up of the Hubble Sequence
• Black hole kicks as new gravitational wave observables
• Preferential Accretion and Circumbinary Disk Precession in Eccentric Binary Systems
• Black hole evolution: II. Spinning black holes in a supernova-driven turbulent interstellar medium
• Spin-driven jet feedback in idealised simulations of galaxy groups and clusters
• Resolving massive black hole binaries evolution via adaptive particle-splitting
• Galaxy interactions are the dominant trigger for local type 2 quasars
• Missing black holes in brightest cluster galaxies as evidence for the occurrence of superkicks in nature
• Resonances in retrograde circumbinary discs
• Parameter estimation for coalescing massive binary black holes with LISA using the full 2-post-Newtonian gravitational waveform and spin-orbit precession
• 3D Radiation Hydrodynamic Simulations of Gravitational Instability in AGN Accretion Disks: Effects of Radiation Pressure
• The effect of differential accretion on the Gravitational Wave Background and the present day MBH Binary population
• The evolution of the mass ratio of accreting binaries: the role of gas temperature
• LISA detection of massive black hole binaries: imprint of seed populations and of exterme recoils
• Extreme recoils: impact on the detection of gravitational waves from massive black hole binaries
• Circumbinary disc self-gravity governing supermassive black hole binary mergers
• A unified accretion disc model for supermassive black holes in galaxy formation simulations: method and implementation
• Chaotic Gas Accretion by Black Holes Embedded in AGN Discs as Cause of Low-spin Signatures in Gravitational Wave Events
• Amplification of superkicks in black-hole binaries through orbital eccentricity
• Eccentric Binaries in Retrograde Disks
• On the Role of Gas Cooling in the Dynamics of Circumbinary Disks
• Misaligned accretion on to supermassive black hole binaries
• The evolution of a binary in a retrograde circular orbit embedded in an accretion disk
• Evidence for a milliparsec-separation Supermassive Binary Black Hole with quasar microlensing
• How the super-Eddington regime affects black hole spin evolution in high-redshift galaxies
• Dynamical evolution of massive black hole pairs in the presence of spin-dependent radiative feedback

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• Identifying supermassive black hole recoil in elliptical galaxies
• Complex morphology and precession indicators of AGN jets in LoTSS DR2
• Probing AGN jet precession with LISA
• Premature supermassive black hole mergers in cosmological simulations of structure formation
• Accretion mediated spin-eccentricity correlations in LISA massive black hole binaries
• Growth of Light Seed Black Holes in the Early Universe
• Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers
• First Light And Reionization Epoch Simulations (FLARES) -- XIX: Supermassive black hole mergers in the early Universe and their environmental dependence
• Rapid sinking and efficient mergers of supermassive black holes in compact high-redshift galaxies
• Source Confusion of Massive Black Hole Binaries for the Taiji Mission