Formation sites of Population III star formation: The effects of different levels of rotation and turbulence on the fragmentation behavior of primordial gas

Abstract

We use the moving-mesh code AREPO to investigate the effects of different levels of rotation and turbulence on the fragmentation of primordial gas and the formation of Population III stars. We consider 9 different combinations of turbulence and rotation and carry out 5 different realizations of each setup, yielding one of the largest sets of simulations of Population III star formation ever performed. We find that fragmentation in Population III star-forming systems is a highly chaotic process and show that the outcomes of individual realizations of the same initial conditions often vary significantly. However, some general trends are apparent. Increasing the turbulent energy promotes fragmentation, while increasing the rotational energy inhibits fragmentation. Within the 1000 yr period that we simulate, runs including turbulence yield flat protostellar mass functions while purely rotational runs show a more top-heavy distribution. The masses of the individual protostars are distributed over a wide range from a few $10^{-3}{\mathrm{M}}_{\odot }$ to several tens of ${\mathrm{M}}_{\odot }$. The total mass growth rate of the stellar systems remains high throughout the simulations and depends only weakly on the degree of rotation and turbulence. Mergers between protostars are common, but predictions of the merger fraction are highly sensitive to the criterion used to decide whether two protostars should merge. Previous studies of Population III star formation have often considered only one realization per set of initial conditions. However, our results demonstrate that robust trends can only be reliably identified by considering averages over a larger sample of runs.

arXiv comment25 pages, 11 figures. Accepted by MNRAS. PDF and machine-readable versions of the tables from Appendix B can be downloaded from http://www.ita.uni-heidelberg.de/~sglover/Wollenberg2019-AppendixB.tar.gz

References in corpus (86)

• On the variation of the Initial Mass Function
• The cosmological simulation code GADGET-2
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• The Formation of the First Star in the Universe
• The Formation of the First Stars. I. The Primordial Star Forming Cloud
• The First Stars
• Modelling Accretion in Protobinary Systems
• How small were the first cosmological objects?
• Comparing the statistics of interstellar turbulence in simulations and observations: Solenoidal versus compressive turbulence forcing
• Dense Cores in Dark Clouds. XIV. N2H+(1-0) maps of dense cloud cores
• One Hundred First Stars : Protostellar Evolution and the Final Masses
• Near-Field Cosmology with Metal-Poor Stars
• Formation of Primordial Stars in a LCDM Universe
• Simulations on a Moving Mesh: The Clustered Formation of Population III Protostars
• Evolution of Massive Protostars with High Accretion Rates
• The Formation and Fragmentation of Disks around Primordial Protostars
• Second-Generation Objects in the Universe: Radiative Cooling and Collapse of Halos with Virial Temperatures Above 10^4 Kelvin
• Protostar Formation in the Early Universe
• Improving the convergence properties of the moving-mesh code AREPO
• The Formation of Population III Binaries from Cosmological Initial Conditions
• Formation of the First Stars by Accretion
• Formation of the First Stars
• 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
• The first stars: formation of binaries and small multiple systems
• A new Jeans resolution criterion for (M)HD simulations of self-gravitating gas: Application to magnetic field amplification by gravity-driven turbulence
• Magnetohydrodynamics on an unstructured moving grid
• Gravitational fragmentation in turbulent primordial gas and the initial mass function of Population III stars
• Uncertainties in H2 and HD Chemistry and Cooling and their Role in Early Structure Formation
• Building up the Population III initial mass function from cosmological initial conditions
• The Formation of the First Stars II. Radiative Feedback Processes and Implications for the Initial Mass Function
• Evolution of Massive Protostars via Disk Accretion
• The First Galaxies: Assembly, Cooling and the Onset of Turbulence
• The First Stars: Mass Growth Under Protostellar Feedback
• Primordial Magnetic Fields from Cosmological First Order Phase Transitions
• Disk formation during collapse of magnetized protostellar cores
• Simulating star formation in molecular cloud cores I. The influence of low levels of turbulence on fragmentation and multiplicity
• Formation of Massive Primordial Stars: Intermittent UV Feedback with Episodic Mass Accretion
• Limiting Accretion onto Massive Stars by Fragmentation-Induced Starvation
• The generation of strong magnetic fields during the formation of the first stars
• Star formation at very low metallicity. I: Chemistry and cooling at low densities
• Small-scale dynamo action during the formation of the first stars and galaxies. I. The ideal MHD limit
• Pre-galactic metal enrichment - The chemical signatures of the first stars
• Constraining the Statistics of Population III Binaries
• The Evolution of Supermassive Population III Stars
• Magnetic Fields in Population III Star Formation
• Magnetic fields during the early stages of massive star formation - I. Accretion and disk evolution
• The Small-Scale Dynamo and Non-Ideal MHD in Primordial Star Formation
• On the Maximum Mass of Accreting Primordial Supermassive Stars
• Simulating star formation in molecular cores II. The effects of different levels of turbulence
• The Internal Energy for Molecular Hydrogen in Gravitationally Unstable Protoplanetary Disks
• Radiative feedback from an early X-ray background
• The Effects of Accretion Luminosity upon Fragmentation in the Early Universe
• The Formation of the First Stars in the Universe
• The Biermann Battery in Cosmological MHD Simulations of Population III Star Formation
• The Cloud Factory I: Generating resolved filamentary molecular clouds from galactic-scale forces
• Formation and survival of Population III stellar systems
• The formation of direct collapse black holes under the influence of streaming velocities
• Simulations of the star-forming molecular gas in an interacting M51-like galaxy
• Fragmentation and the formation of primordial protostars: the possible role of Collision Induced Emission
• Formation of massive seed black holes via collisions and accretion
• The Formation of Population III Stars in Gas Accretion Stage: Effects of Magnetic Fields
• The mass of first stars
• Is H3+ cooling ever important in primordial gas?
• Collisions in Primordial Star Clusters: Formation Pathway for intermediate mass black holes
• Merge or survive: Number of Population III stars per minihalo
• Importance of the Initial Conditions for Star Formation - II. Fragmentation Induced Starvation and Accretion Shielding
• Formation of Population III Stars in Fossil HII Regions: Significance of HD
• The First Stars: A Low-Mass Formation Mode
• Effects of Varying the Three-Body Molecular Hydrogen Formation Rate in Primordial Star Formation
• Conditions for the Formation of First-Star Binaries
• Rotation and Internal Structure of Population III Protostars
• Rate of three-body recombination of hydrogen molecules during primordial star formation
• Protostellar mass accretion rates from gravoturbulent fragmentation
• Rosseland and Planck mean opacities for primordial matter
• Variable Accretion Rates and Fluffy First Stars
• Observational constraints on the survival of pristine stars
• Dark Matter Halo Environment for Primordial Star Formation
• The First Stars: formation under X-ray feedback
• Low-metallicity star formation: Relative impact of metals and magnetic fields
• The formation of protostellar binaries in primordial minihalos
• A new approach to determine optically thick H2 cooling and its effect on primordial star formation
• Multifrequency radiation hydrodynamics simulations of H2 line emission in primordial, star-forming clouds
• Primordial star formation: relative impact of H2 three-body rates and initial conditions
• Impact of an accurate modeling of primordial chemistry in high resolution studies
• The First Stars: formation under cosmic ray feedback

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• Population III star formation in the presence of turbulence, magnetic fields and ionizing radiation feedback
• Saturation level of turbulence in collapsing gas clouds
• Impact of cosmic rays on the global 21-cm signal during cosmic dawn
• The mass distribution of the first stars can be determined via the 21-cm signal
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• Disc fragmentation and oligarchic growth of protostellar systems in low-metallicity gas clouds
• Growth of Light Seed Black Holes in the Early Universe
• Population III star formation: multiple gas phases prevent the use of an equation of state at high densities
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• Halo Mergers Enhance the Growth of Massive Black Hole Seeds
• Triggered Population III star formation: the effect of H${}_2$ self-shielding
• Impact of Population III stars on the astrophysical gravitational-wave background
• Type Ia Supernovae from First-generation Stars
• Radiation magnetohydrodynamics simulations of Population III star formation during the Epoch of Reionization
• Searching for Low-mass Population III Stars Disguised as White Dwarfs
• Black Hole - Neutron Star and Binary Neutron Star Mergers from Population III and II stars
• Studying The Effect of Radiation Pressure on Evolution of a Population III Stellar Cluster