Direct N-body simulation of the Galactic centre

Abstract

We study the dynamics and evolution of the Milky Way nuclear star cluster performing a high resolution direct one-million-body simulation. Focusing on the interactions between such stellar system and the central supermassive black hole, we find that different stellar components adapt their overall distribution differently. After 5 Gyr, stellar mass black holes are characterized by a spatial distribution with power-slope $-1.75$, fully consistent with the prediction of Bahcall-Wolf pioneering work. Using the vast amount of data available, we infer the rate for tidal disruption events, being $4\times 10^{-6}$ per yr, and estimate the number of objects that emit gravitational waves during the phases preceding the accretion onto the super-massive black hole, $\sim 270$ per Gyr. We show that some of these sources could form extreme mass-ratio inspirals. We follow the evolution of binary stars population, showing that the initial binary fraction of $5\%$ drops down to $2.5\%$ inside the inner parsec. Also, we explored the possible formation of binary systems containing a compact object, discussing the implications for millisecond pulsars formation and the development of Ia Supernovae.

arXiv commentAccepted by MNRAS after a major revision

References in corpus (85)

• On the variation of the Initial Mass Function
• TianQin: a space-borne gravitational wave detector
• Evolution of binary stars and the effect of tides on binary populations
• Monitoring stellar orbits around the Massive Black Hole in the Galactic Center
• Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
• The M-sigma and M-L Relations in Galactic Bulges and Determinations of their Intrinsic Scatter
• A statistical study of 233 pulsar proper motions
• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way
• A Comprehensive Study of Binary Compact Objects as Gravitational Wave Sources: Evolutionary Channels, Rates, and Physical Properties
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• Observational clues to the progenitors of Type-Ia supernovae
• Black Holes, Galaxy Formation, and the M_BH-sigma Relation
• Stellar Orbits Around the Galactic Center Black Hole
• Science with the space-based interferometer LISA. V: Extreme mass-ratio inspirals
• The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics and Formation
• Intermediate and Extreme Mass-Ratio Inspirals -- Astrophysics, Science Applications and Detection using LISA
• Rapid and Bright Stellar-mass Binary Black Hole Mergers in Active Galactic Nuclei
• Assisted Inspirals of Stellar Mass Black Holes Embedded in AGN Disks: Solving the "Final AU Problem"
• An Update on Monitoring Stellar Orbits in the Galactic Center
• The Accelerations of Stars Orbiting the Milky Way's Central Black Hole
• Secular evolution of compact binaries near massive black holes: gravitational wave sources and other exotica
• Stellar disk in the galactic center -- a remnant of a dense accretion disk?
• Rates of Stellar Tidal Disruption as Probes of the Supermassive Black Hole Mass Function
• Stellar Processes Near the Massive Black Hole in the Galactic Center
• On stellar-mass black hole mergers in AGN disks detectable with LIGO
• The AGN-starburst connection, Galactic superwinds, and M_BH - sigma
• The DRAGON simulations: globular cluster evolution with a million stars
• Accelerating NBODY6 with Graphics Processing Units
• Stellar remnants in galactic nuclei: mass segregation
• NBODY6++GPU: Ready for the gravitational million-body problem
• Strong mass segregation around a massive black hole
• The Evolution of Binary Fractions in Globular Clusters
• Dissipationless Formation and Evolution of the Milky Way Nuclear Star Cluster
• Massive Black Holes in Star Clusters. II. Realistic Cluster Models
• Merging Binaries in the Galactic Center: The eccentric Kozai-Lidov mechanism with stellar evolution
• Properties of the Remnant Clockwise Disk of Young Stars in the Galactic Center
• An Overabundance of Transient X-ray Binaries within 1 pc of the Galactic Center
• A Quantitative Test of the No-Hair Theorem with Sgr A* using stars, pulsars, and the Event Horizon Telescope
• The Tidal Disruption of Giant Stars and Their Contribution to the Flaring Supermassive Black Hole Population
• The Evolution of the Globular Cluster System in a Triaxial Galaxy: Can a Galactic Nucleus Form by Globular Cluster Capture?
• Disrupted Globular Clusters Can Explain the Galactic Center Gamma Ray Excess
• Evolution towards and beyond accretion-induced collapse of massive white dwarfs and formation of millisecond pulsars
• The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2
• The Milky Way's Supermassive Black Hole: How good a case is it? A Challenge for Astrophysics & Philosophy of Science
• Massive Black Holes in Star Clusters. I. Equal-mass clusters
• On strong mass segregation around a massive black hole: Implications for lower-frequency gravitational-wave astrophysics
• Stellar density profile and mass of the Milky Way Bulge from VVV data
• The origin of the first neutron star -- neutron star merger
• Deep HST-WFPC2 photometry of NGC 288. I. Binary Systems and Blue Stragglers
• Gravitational wave sources from inspiralling globular clusters in the Galactic Centre and similar environments
• The nuclear cluster of the Milky Way: Our primary testbed for the interaction of a dense star cluster with a massive black hole
• The distribution of old stars around the Milky Way's central black hole I: Star counts
• Initial conditions for disc galaxies
• Secular Evolution Of Binaries Near Massive Black Holes: Formation of compact binaries, merger/collision products and G2-like objects
• The impact of realistic models of mass segregation on the event rate of extreme-mass ratio inspirals and cusp re-growth
• The distribution of stars around the Milky Way's black hole III: Comparison with simulations
• Star Clusters with Primordial Binaries: III. Dynamical Interaction between Binaries and an Intermediate Mass Black Hole
• A Remarkable Low-Mass X-ray Binary within 0.1 pc of the Galactic Center
• Research Update on Extreme-Mass-Ratio Inspirals
• Massive binaries in the vicinity of Sgr A*
• Natal Kicks and Time Delays in Merging Neutron Star Binaries - Implications for r-process nucleosynthesis in Ultra Faint Dwarfs and in the Milky Way
• Henize 2-10: the ongoing formation of a nuclear star cluster around a massive black hole
• Binary dynamics near a massive black hole
• Direct formation of millisecond pulsars from rotationally delayed accretion-induced collapse of massive white dwarfs
• On the rotation of nuclear star clusters formed by cluster-inspirals
• A new Fokker-Planck approach for relaxation-driven evolution of galactic nuclei
• Star-disc interaction in galactic nuclei: orbits and rates of accreted stars
• The role of the supermassive black hole spin in the estimation of the EMRI event rate
• Full Three Dimensional Orbits For Multiple Stars on Close Approaches to the Central Supermassive Black Hole
• Orbital inspiral into a massive black hole in a galactic center
• The distribution of stars around the Milky Way's central black hole II: Diffuse light from sub-giants and dwarfs
• An Ultra-deep Chandra Catalog of X-ray Point Sources in the Galactic Center Star Cluster
• Disruption of a Red Giant Star by a Supermassive Black Hole and the Case of PS1-10jh
• Star-disc interaction in galactic nuclei: formation of a central stellar disc
• Hypervelocity stars from young stellar clusters in the Galactic Centre
• Gamma-ray and X-ray emission from the Galactic Centre: hints on the nuclear star cluster formation history
• Lack of nuclear clusters in dwarf spheroidal galaxies: implications for massive black holes formation and the cusp/core problem
• Enhanced accretion rates of stars on Super-massive Black Holes by star-disk interactions in galactic nuclei
• Extreme mass ratio inspiral rates: dependence on the massive black hole mass
• Probing the formation history of the nuclear star cluster at the Galactic Centre with millisecond pulsars
• Supernova Kicks and Dynamics of Compact Remnants in the Galactic Centre
• The MEGaN project I. Missing formation of massive nuclear clusters and tidal disruption events by star clusters - massive black hole interactions
• Star Formation and Dynamics in the Galactic Centre
• Investigation of Some Physical Properties of Accretion Induced Collapse in Producing Millisecond Pulsars

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• Nuclear Star Clusters
• AGN Disks Harden the Mass Distribution of Stellar-mass Binary Black Hole Mergers
• PeTar: a high-performance N-body code for modeling massive collisional stellar systems
• The Missing Link in Gravitational-Wave Astronomy: Discoveries waiting in the decihertz range
• Intermediate Mass Black Hole Formation in compact Young Massive Star Clusters
• Celestial-Body Focused Dark Matter Annihilation Throughout the Galaxy
• High Eccentricities and High Masses Characterize Gravitational-wave Captures in Galactic Nuclei as Seen by Earth-based Detectors
• Preparing the next gravitational million-body simulations: Evolution of single and binary stars in Nbody6++GPU, MOCCA and McLuster
• Birth, life, and death of black hole binaries around supermassive black holes: dynamical evolution of gravitational wave sources
• Order in the chaos: eccentric black hole binary mergers in triples formed via strong binary-binary scatterings
• Eccentricity evolution of massive black hole binaries from formation to coalescence
• Quiescent and active galactic nuclei as factories of merging compact objects in the era of gravitational-wave astronomy
• Formation of super-massive black holes in galactic nuclei I: delivering seed intermediate-mass black holes in massive stellar clusters
• Stellar Distributions Around a Supermassive Black Hole: Strong Segregation Regime Revisited
• The X-ray binary population in the Galactic Center revealed through multi-decade observations
• Massive black hole assembly in nuclear star clusters
• Extreme-mass-ratio burst detection with TianQin
• Global instability by runaway collisions in nuclear stellar clusters: Numerical tests of a route for massive black hole formation
• Observational Support for Massive Black Hole Formation Driven by Runaway Stellar Collisions in Galactic Nuclei
• Time-dependent stellar-mass binary black hole mergers in AGN disks: Mass distribution of hierarchical mergers
• Milky Way White Dwarfs as Sub-GeV to Multi-TeV Dark Matter Detectors
• Revisit the rate of tidal disruption events: the role of the partial tidal disruption event
• The gravitational capture of compact objects by massive black holes
• NuSTAR and Chandra observations of new X-ray transients in the central parsec of the Galaxy
• Rapid formation of a very massive star >50000 $M_{\odot }$ and subsequently an IMBH from runaway collisions. Direct N-body and Monte Carlo simulations of dense star clusters
• A numerical study of stellar discs in galactic nuclei
• Efficiency of black hole formation via collisions in stellar systems: An analysis of data from simulations and observations
• Observational signatures of the black hole Mass Distribution in the Galactic Center
• Massive White Dwarfs in the Galactic Center: A Chandra X-ray Spectroscopy of Cataclysmic Variables
• Secular Dynamics around a Supermassive Black Hole via Multipole Expansion
• Order-disorder phase transition in black-hole star clusters. II. A scale-free cluster
• Segregation and Collisions in Galactic Nuclei: Rates of Destructive Events Near a Supermassive Black Hole
• Dynamical evolution of Milky Way globular clusters on the cosmological timescale I. Mass loss and interaction with the nuclear star cluster
• Study on the detectability of gravitational radiation from single-binary encounters between black holes in nuclear star cluster: the case of hyperbolic flybys
• Evolution of eccentric stellar disks around supermassive black holes: the complex disk disruption dynamics and the milliparsec stars
• Exploring the origin of stars on bound and unbound orbits causing tidal disruption events
• Parameter Distributions of Binary Black Hole Mergers Near Supermassive Black Holes as Seen by Advanced Gravitational Wave Detectors
• Astrophysics with the Laser Interferometer Space Antenna
• Evolution of the disky second generation of stars in globular clusters on cosmological timescale
• Energy Flux and Particle Flux in Steady-State Solutions of Nuclear Star Clusters
• Apparent counter-rotation in the torus of NGC 1068: influence of an asymmetric wind
• Tracing the Evolution of SMBHs and Stellar Objects in Galaxy Mergers: An Multi-mass Direct N-body Model
• Resonant interactions from dynamical perturbers on generic orbits around an extreme mass ratio inspiral
• Co-evolution of Nuclear Star Clusters and Massive Black Holes: Extreme Mass-Ratio Inspirals
• Intermediate Mass Black Hole Binary Evolution in Nuclear Star Clusters: the effect of the stellar mass black hole population
• The contribution to Galactic Centre γ-ray excess from cluster-born millisecond pulsars. Constraints from direct N-body simulations
• Thermal equilibrium of an ideal gas in a free-floating box