Turbulent Cold Flows Gave Birth to the First Quasars

Abstract

How quasars powered by supermassive black holes (SMBHs) formed less than a billion years after the Big Bang is still one of the outstanding problems in astrophysics 20 years after their discovery${}^{1-4}$. Cosmological simulations suggest that rare cold flows converging on primordial haloes in low-shear environments could have created these quasars if they were 10${}^4$ - 10${}^5$ M${}_{\odot }$ at birth but could not resolve their formation${}^{5-8}$. Semianalytical studies of the progenitor halo of a primordial quasar found that it favours the formation of such seeds but could not verify if one actually appeared${}^9$. Here we show that a halo at the rare convergence of strong, cold accretion flows creates massive BH seeds without the need for UV backgrounds, supersonic streaming motions, or even atomic cooling. Cold flows drive violent, supersonic turbulence in the halo that prevents star formation until it reaches a mass that triggers sudden, catastrophic baryon collapse that forms 31,000 and 40,000 M${}_{\odot }$ stars. This simple, robust process ensures that haloes capable of forming quasars by z $>$ 6 produce massive seeds. The first quasars were thus a natural consequence of structure formation in cold dark matter cosmologies, not exotic, finely-tuned environments as previously thought${}^{10-14}$.

Author's version of a Letter published in Nature on July 6th, 2022

References in corpus (25)

• Modules for Experiments in Stellar Astrophysics (MESA)
• A luminous quasar at a redshift of z = 7.085
• Analytical theory for the initial mass function: CO clumps and prestellar cores
• Supermassive black hole formation during the assembly of pre-galactic discs
• A Luminous Quasar at Redshift 7.642
• Modeling Collapse and Accretion in Turbulent Gas Clouds: Implementation and Comparison of Sink Particles in AMR and SPH
• Formation of z ~ 6 quasars from hierarchical galaxy mergers
• A new Jeans resolution criterion for (M)HD simulations of self-gravitating gas: Application to magnetic field amplification by gravity-driven turbulence
• Uncertainties in H2 and HD Chemistry and Cooling and their Role in Early Structure Formation
• Formation of massive black holes in rapidly growing pre-galactic gas clouds
• Rapid growth of seed black holes in the early universe by supra-exponential accretion
• The Evolution of Supermassive Population III Stars
• Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
• Formation of massive protostars in atomic cooling haloes
• The origin of most massive black holes at high-z: BLUETIDES and the next quasar frontier
• How realistic UV spectra and X-rays suppress the abundance of direct collapse black holes
• Does disk fragmentation prevent the formation of supermassive stars in protogalaxies?
• On the Rotation of Supermassive Stars
• Host galaxies of high-redshift quasars: supermassive black hole growth and feedback
• The descendants of the first quasars in the BlueTides simulation
• Songlines from Direct Collapse Seed Black Holes: Effects of X-rays on Black Hole Growth and Stellar Populations
• On the Detection of Supermassive Primordial Stars
• Finding Direct-Collapse Black Holes at Birth
• Where can we really find the First Stars' Remnants today?
• Magnetic braking of supermassive stars through winds

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• Fermionic Dark Matter: Physics, Astrophysics, and Cosmology
• Intermediate-mass black holes: finding of episodic, large-scale and powerful jet activity in a dwarf galaxy
• On the growth of supermassive black holes formed from the gravitational collapse of fermionic dark matter cores
• Direct-collapse black hole formation induced by internal radiation of host halos
• 3D hydrodynamics simulations of core convection in supermassive main-sequence stars