Supermassive Star Formation via Super Competitive Accretion in Slightly Metal-enriched Clouds

Abstract

Direct collapse black hole (DCBH) formation with mass $\gtrsim 10^5{M}_{\odot }$ is a promising scenario for the origin of high-redshift supermassive black holes. It has usually been supposed that the DCBH can only form in the primordial gas since the metal enrichment enhances the cooling ability and causes the fragmentation into smaller pieces. What actually happens in such an environment, however, has not been explored in detail. Here, we study the impact of the metal enrichment on the clouds, conducting hydrodynamical simulations to follow the cloud evolution in cases with different degree of the metal enrichment $Z/Z_{\odot }=10^{-6}-10^{-3}$. Below $Z/Z_{\odot }=10^{-6}$, metallicity has no effect and supermassive stars form along with a small number of low-mass stars. With more metallicity $Z/Z_{\odot }\gtrsim 5\times 10^{-6}$, although the dust cooling indeed promotes fragmentation of the cloud core and produces about a few thousand low-mass stars, the accreting flow preferentially feeds the gas to the central massive stars, which grows supermassive as in the primordial case. We term this formation mode as the {\it super competitive accretion}, where only the central few stars grow supermassive while a large number of other stars are competing for the gas reservoir. Once the metallicity exceeds $10^{-3}{Z}_{\odot }$ and metal-line cooling becomes operative, the central star cannot grow supermassive due to lowered accretion rate. Supermassive star formation by the super competitive accretion opens up a new window for seed BHs, which relaxes the condition on metallicity and enhances the seed BH abundance.

10 pages, 6figures, submitted to MNRAS

References in corpus (26)

• A luminous quasar at a redshift of z = 7.085
• An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Primordial Star Formation under the Influence of Far Ultraviolet Radiation: 1540 Cosmological Halos and the Stellar Mass Distribution
• The Mass Spectrum of the First Stars
• Accretion onto the First Stellar Mass Black Holes
• Fluctuations in the High-Redshift Lyman-Werner Background: Close Halo Pairs as the Origin of Supermassive Black Holes
• Can Supermassive Black Holes Form in Metal-Enriched High-Redshift Protogalaxies ?
• Formation of massive black holes in rapidly growing pre-galactic gas clouds
• The Evolution of Supermassive Population III Stars
• Feedback-regulated Super Massive Black Hole Seed Formation
• The critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape
• Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
• Formation of massive protostars in atomic cooling haloes
• Direct collapse black hole formation from synchronized pairs of atomic cooling halos
• The Final Fates of Accreting Supermassive Stars
• Formation of an embryonic supermassive star in the first galaxy
• Formation of primordial supermassive stars by burst accretion
• Merge or survive: Number of Population III stars per minihalo
• Does disk fragmentation prevent the formation of supermassive stars in protogalaxies?
• Radiation hydrodynamics simulations of the formation of direct-collapse supermassive stellar systems
• Dust-cooling--induced Fragmentation of Low-metallicity Clouds
• The suppression of direct collapse black hole formation by soft X-ray irradiation
• A No-Go Theorem for Direct Collapse Black Holes Without a Strong Ultraviolet Background
• Particle splitting in smoothed particle hydrodynamics based on Voronoi diagram
• Gravitational stability and fragmentation condition for discs around accreting supermassive stars

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• The origins of massive black holes
• Transition of the initial mass function in the metal-poor environments
• The low-end of the black hole mass function at cosmic dawn
• Turbulent Cold Flows Gave Birth to the First Quasars
• The Science of the Einstein Telescope
• Intermediate mass black holes from stellar mergers in young star clusters
• Light, medium-weight or heavy? The nature of the first supermassive black hole seeds
• Impact of the cosmic background radiation on the initial mass function of metal-poor stars
• Rapid growth of seed black holes during early bulge formation
• Multiple channels for nitrogen pollution by metal enriched supermassive stars and implications for GN-z11
• Hyper-Eddington accretion flows onto black holes accompanied by powerful outflows
• Multi-flavour SMBH seeding and evolution in cosmological environments
• Seeking the growth of the first black hole seeds with JWST
• Formation of supermassive stars in the first star clusters
• Formation of supermassive black hole seeds in nuclear star clusters via gas accretion and runaway collisions
• Unveiling early black hole growth with multi-frequency gravitational wave observations
• Dynamical evolution of Population III stellar systems and the resulting binary statistics
• Origin of supermassive black holes in massive metal-poor protoclusters
• Long-term evolution of supercritical black hole accretion with outflows: a subgrid feedback model for cosmological simulations
• Super-critical accretion of medium-weight seed black holes in gaseous proto-galactic nuclei
• Stellar collisions in flattened and rotating Pop. III star clusters
• Violent starbursts and quiescence induced by FUV radiation feedback in metal-poor galaxies at high-redshift
• Global instability by runaway collisions in nuclear stellar clusters: Numerical tests of a route for massive black hole formation
• Cosmological DCBH formation sites hostile for their growth
• How long do high-redshift massive black hole seeds remain outliers in black hole vs. host galaxy relations?
• Evolution of high-redshift quasar hosts and promotion of massive black hole seed formation
• Hyper-Eddington Black Hole Growth in Star-Forming Molecular Clouds and Galactic Nuclei: Can It Happen?
• Effect of mass loss due to stellar winds on the formation of supermassive black hole seeds in dense nuclear star clusters
• The formation of supermassive black holes from Population III.1 seeds. II. Evolution to the local universe
• Possible Connection between Dark Matter and Supermassive Black Holes
• Inception of a first quasar at cosmic dawn
• Direct-collapse black hole formation induced by internal radiation of host halos
• Evolution and explosions of metal enriched supermassive stars: proton rich general relativistic instability supernovae
• Impact of gas based seeding on supermassive black hole populations at $z\ge 7$
• Efficiency of black hole formation via collisions in stellar systems: An analysis of data from simulations and observations
• New constraints on the central mass contents of Omega Centauri from combined stellar kinematics and pulsar timing
• Role of magnetic fields in the formation of direct collapse black holes
• Pulsation-driven mass loss from massive stars behind stellar mergers in metal-poor dense clusters
• First emergence of cold accretion and supermassive star formation in the early universe
• Little Red Dots as Direct-collapse Black Hole Nurseries
• The physical origin of super-competitive accretion during the formation of the first supermassive black holes
• Supermassive Star Formation in Magnetized Atomic-Cooling Gas Clouds: Enhanced Accretion, Intermittent Fragmentation, and Continuous Mergers
• Massive black hole formation in Population III star clusters
• Radiative feedback for supermassive star formation in a massive cloud with H2 molecules in an atomic-cooling halo
• The mean free path approximation and stellar collisions in star clusters: Numerical exploration of the analytic rates and the role of perturbations on binary star mergers
• Spectral Uniformity of Little Red Dots: A Natural Outcome of Coevolving Seed Black Holes and Nascent Starbursts
• Observational Signatures of Massive Black Hole Progenitor Pathways: Could Leo I a Smoking Gun?
• Evolution of the mass relation between supermassive black holes and dark matter halos across the cosmic time
• Magnetic Effects Promote Supermassive Star Formation in Metal-enriched Atomic-cooling Halos
• Connecting the Dots: UV-Bright Companions of Little Red Dots as Lyman-Werner Sources Enabling Direct Collapse Black Hole Formation
• Rotating Supermassive Pop III Stars On The Main Sequence
• Formation of supermassive stars in the first stellar clusters: Dependence on the gas temperature
• Astrophysics with the Laser Interferometer Space Antenna
• Physical Processes Behind the Co-Evolution of Halos, Galaxies and Supermassive Black Holes in the IllustrisTNG Simulation
• The Dawn of Black Holes
• Gravitational collapse at low to moderate Mach numbers: The relationship between star formation efficiency and the fraction of mass in the massive object
• Super-Eddington Growth Ceiling: Analytic Constraints on the Rapid Growth of Light-Seed Black Holes in Massive Clumps
• Super-Eddington accretion in high-redshift quasar hosts: Black-hole driven outflows, galaxy quenching, and the nature of little red dots
• The In Situ Growth of Stellar-mass "Light" Seed Black Holes in Nuclear Star Clusters
• Black hole merger rates for LISA and LGWA from semi-analytical modelling of light seeds
• Off-center black hole seed formation? Implications for high and low redshift massive black holes
• Identification of Candidate Halos Hosting Massive Black Hole Seeds in the $\text{Renaissance}$ Simulations with Support Vector Machines
• Massive star clusters detected by JWST as natural birth places to form intermediate-mass black holes
• Radiative feedback on supermassive star formation: the massive end of the Population III initial mass function