The ecology of star clusters and intermediate mass black holes in the Galactic bulge

Abstract

We simulate the inner 100pc of the Milky-Way Galaxy to study the formation and evolution of the population of star clusters and intermediate mass black holes. For this study we perform extensive direct N-body simulations of the star clusters which reside in the bulge, and of the inner few tenth of parsecs of the super massive black hole in the Galactic center. In our N-body simulations the dynamical friction of the star cluster in the tidal field of the bulge are taken into account via (semi)analytic soluations. The N-body calculations are used to calibrate a (semi)analytic model of the formation and evolution of the bulge. We find that about 10% of the clusters born within 100pc of the Galactic center undergo core collapse during their inward migration and form intermediate-mass black holes (IMBHs) via runaway stellar merging. After the clusters dissolve, these IMBHs continue their inward drift, carrying a few of the most massive stars with them. We predict that region within about 10 parsec of the SMBH is populated by about 50IMBHs of some 1000Msun. Several of these are expected to be accompanied still by some of the most massive stars from the star cluster. We also find that within a few milliparsec of the SMBH there is a steady population of several IMBHs. This population drives the merger rate between IMBHs and the SMBH at a rate of about one per 10Myr, sufficient to build the accumulate majority of mass of the SMBH. Mergers of IMBHs with SMBHs throughout the universe are detectable by LISA, at a rate of about two per week.

arXiv comment26 pages, ApJ in press. Old title: The Galactic center welcomes black hole immigrants

References in corpus (63)

• Embedded Clusters in Molecular Clouds
• How Massive Single Stars End their Life
• Mass-loss predictions for O and B stars as a function of metallicity
• The Environmental Dependence of the Relations between Stellar Mass, Structure, Star Formation and Nuclear Activity in Galaxies
• A fundamental plane of black hole activity
• The Proper Motion of Sgr A*: II. The Mass of Sgr A*
• Dynamical evolution of star clusters in tidal fields
• High Proper Motion Stars in the Vicinity of Sgr A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy
• The formation of massive black holes through collision runaway in dense young star clusters
• The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy's Central Black Hole: A Paradox of Youth
• The runaway growth of intermediate-mass black holes in dense star clusters
• The Stellar Cusp Around the Supermassive Black Hole in the Galactic Center
• Stellar evolution with rotation XI: Wolf-Rayet star populations at different metallicities
• Stellar evolution with rotation X: Wolf-Rayet star populations at solar metallicity
• The Complete Star Formation History of the Universe
• The Accelerations of Stars Orbiting the Milky Way's Central Black Hole
• Ejection of hypervelocity stars by the (binary) black hole(s) in the Galactic center
• Formation of Massive Black Holes in Dense Star Clusters. I. Mass Segregation and Core Collapse
• HST/NICMOS Observations of Massive Stellar Clusters Near the Galactic Center
• Star cluster ecology IVa: Dissection of an open star cluster---photometry
• Discovery of an Unbound Hyper-Velocity Star in the Milky Way Halo
• The Mass Function of Young Star Clusters in the "Antennae" Galaxies
• Massive Stars in the Quintuplet Cluster
• An upper limit to the masses of stars
• Massive Stars in the Arches Cluster
• Missing Link Found? --- The ``runaway'' path to supermassive black holes
• Surface Brightness Profiles and Structural Parameters for 53 Rich Stellar Clusters in the Large Magellanic Cloud
• Line-driven winds, ionizing fluxes and UV-spectra of hot stars at extremely low metallicity. I. Very massive O-stars
• Chaotic Loss Cones, Black Hole Fueling and the M-Sigma Relation
• The Galactic Center He I Stars: Remains of a Dissolved Young Cluster?
• A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center
• Massive Black Holes in Star Clusters. II. Realistic Cluster Models
• GRAPE-6: The massively-parallel special-purpose computer for astrophysical particle simulation
• The need for a second black hole at the Galactic center
• The Merger History of Supermassive Black Holes in Galaxies
• An Overabundance of Transient X-ray Binaries within 1 pc of the Galactic Center
• The "missing" YSOs in the central parsec of the Galaxy: evidence for star formation in a massive accretion disk and a top-heavy IMF
• Growth of Intermediate-Mass Black Holes in Globular Clusters
• Self-gravitating accretion disk in Sgr A* few million years ago: was Sgr A* a failed quasar?
• The nature of the Galactic Center source IRS 13 revealed by high spatial resolution in the infrared
• The Arches Cluster - Evidence for a Truncated Mass Function?
• Core Formation by a Population of Massive Remnants
• Three-body encounters in the Galactic centre: the origin of the hypervelocity star SDSS J090745.0+024507
• Intermediate Mass Black Holes in Accreting Binaries: Formation, Evolution and Observational Appearance
• New Results on the Helium Stars in the Galactic Center Using BEAR Spectro-Imagery
• Direct measurement of the size and shape of the present-day stellar wind of Eta Carinae
• Puzzling wind properties of young massive stars in SMC-N81
• Dynamical Friction of Galactic Center Star Clusters with an Intermediate-Mass Black Hole
• N-Body Simulations of Compact Young Clusters near the Galactic Center
• The fate of star clusters near the Galactic center I: Analytic considerations
• The Disruption of Stellar Clusters Containing Massive Black Holes near the Galactic Center
• A comprehensive set of simulations of high-velocity collisions between main sequence stars
• The origin of IRS 16: dynamically driven inspiral of a dense star cluster to the Galactic center?
• A Black Hole in the Galactic Center Complex IRS 13E?
• Orbital capture of stars by a massive black hole via exchanges with compact remnants
• How many young star clusters exist in the Galactic center?
• Loss Cone Refilling Rates in Galactic Nuclei
• A Radio Transient 0.1 pc from Sagittarius A*
• Intermediate-mass Black Hole and stellar orbits in the Galactic Center
• Discovery of new Milky Way star cluster candidates in the 2MASS point source catalog III. Follow-up observations of cluster candidates in the Galactic Center region
• IRS 16SW - A New Comoving Group of Young Stars in the Central Parsec of the Milky Way
• Odin observations of H2O in the Galactic Centre
• Modelling Collision Products of Triple-Star Mergers

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• Can Star-Disk Collisions Explain the Missing Red Giants Problem in the Galactic Center?
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• Formation of supermassive black holes in galactic nuclei II: retention and growth of seed intermediate-mass black holes
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• Spin and Quadrupole Couplings for High Spin Equatorial Intermediate Mass-ratio Coalescences
• Astrometric Detection of Intermediate-Mass Black Holes At the Galactic Centre
• On Detecting Nearby Nano-Hertz Gravitational Wave Sources via Pulsar Timing Arrays
• The MODEST questions: challenges and future directions in stellar cluster research
• Gravitational waves from merging intermediate-mass black holes : II Event rates at ground-based detectors
• Orbital evolution of gas-driven inspirals with extreme mass-ratios: retrograde eccentric orbits
• Weighing the IMBH candidate CO-0.40-0.22* in the Galactic Centre
• A Measurement of Proper Motions of SiO Maser Sources in the Galactic Center with the VLBA
• Intermediate mass black holes' effect on compact object binaries
• Mergers of globular clusters in the Galactic disc: intermediate mass black hole coalescence and implications for gravitational waves detection
• Distortion of Gravitational-Wave Packets Due to their Self-Gravity
• Hypervelocity binaries from close encounters with a SMBH-IMBH binary: orbital properties and diagnostics
• Can a Satellite Galaxy Merger Explain the Active Past of the Galactic Center?
• Menus for Feeding Black Holes
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• Astrophysics with the Laser Interferometer Space Antenna
• Gravitational Dynamics of Large Stellar Systems
• Introducing a new multi-particle collision method for the evolution of dense stellar systems. Crash-test N-body simulations
• Identifying Stars of Mass >150 Msun from Their Eclipse by a Binary Companion
• Discovery of a Dense Association of Stars in the Vicinity of the Supermassive Black Hole Sgr A*
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