The influence of streaming velocities and Lyman-Werner radiation on the formation of the first stars

Abstract

The first stars in the Universe, the so-called Population III stars, form in small dark matter minihaloes with virial temperatures $T_{\mathrm{vir}}<10^4$~K. Cooling in these minihaloes is dominated by molecular hydrogen (H${}_2$), and so Population III star formation is only possible in those minihaloes that form enough H${}_2$ to cool on a short timescale. As H${}_2$ cooling is more effective in more massive minihaloes, there is therefore a critical halo mass scale $M_{\min }$ above which Population III star formation first becomes possible. Two important processes can alter this minimum mass scale: streaming of baryons relative to the dark matter and the photodissociation of H${}_2$ by a high redshift Lyman-Werner (LW) background. In this paper, we present results from a set of high resolution cosmological simulations that examine the impact of these processes on $M_{\min }$ and on $M_{\mathrm{ave}}$ (the average minihalo mass for star formation), both individually and in combination. We show that streaming has a bigger impact on $M_{\min }$ than the LW background, but also that both effects are additive. We also provide fitting functions quantifying the dependence of $M_{\mathrm{ave}}$ and $M_{\min }$ on the streaming velocity and the strength of the LW background.

arXiv comment15 pages, 12+1 figures, 2 fit-formulas, accepted by MNRAS

References in corpus (74)

• Planck 2015 results. XIII. Cosmological parameters
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Populating a cluster of galaxies - I. Results at z=0
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Baryonic Features in the Matter Transfer Function
• The Formation of the First Star in the Universe
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• On the properties of massive Population III stars and metal-free stellar populations
• Multi-scale initial conditions for cosmological simulations
• Structure of Stationary Photodissociation Fronts
• Forming the First Stars in the Universe: The Fragmentation of Primordial Gas
• Simulations of Early Structure Formation: Primordial Gas Clouds
• One Hundred First Stars : Protostellar Evolution and the Final Masses
• Relative velocity of dark matter and baryonic fluids and the formation of the first structures
• Modeling Collapse and Accretion in Turbulent Gas Clouds: Implementation and Comparison of Sink Particles in AMR and SPH
• The Formation and Fragmentation of Disks around Primordial Protostars
• Simulations of Pregalactic Structure Formation with Radiative Feedback
• The Radiative Feedback of the First Cosmological Objects
• Formation of the First Stars
• Primordial Star Formation under the Influence of Far Ultraviolet Radiation: 1540 Cosmological Halos and the Stellar Mass Distribution
• The spectral evolution of the first galaxies. I. James Webb Space Telescope detection limits and color criteria for population III galaxies
• The Mass Spectrum of the First Stars
• The first stars: formation of binaries and small multiple systems
• Ubiquitous seeding of supermassive black holes by direct collapse
• Population III star formation in a Lambda CDM universe, II: Effects of a photodissociating background
• Photodissociation of H2 in Protogalaxies: Modeling Self-Shielding in 3D Simulations
• Cosmic Dawn (CoDa): the First Radiation-Hydrodynamics Simulation of Reionization and Galaxy Formation in the Local Universe
• Signature of Excess Radio Background in the 21-cm Global Signal and Power Spectrum
• Star formation at very low metallicity. I: Chemistry and cooling at low densities
• The Birth of a Galaxy. II. The Role of Radiation Pressure
• What does the first highly-redshifted 21-cm detection tell us about early galaxies?
• Design and characterization of the Large-Aperture Experiment to Detect the Dark Age (LEDA) radiometer systems
• Suppression of H_2 Cooling in the Ultraviolet Background
• Constraining Baryon--Dark Matter Scattering with the Cosmic Dawn 21-cm Signal
• Constraining the Statistics of Population III Binaries
• The Formation Rates of Population III Stars and Chemical Enrichment of Halos during the Reionization Era
• TreeCol: a novel approach to estimating column densities in astrophysical simulations
• The Delay of Population III Star Formation by Supersonic Streaming Velocities
• Effects of a Soft X-ray Background on Structure Formation at High Redshift
• The Inhomogeneous Background of H2 Dissociating Radiation During Cosmic Reionization
• The Inhomogeneous Background of Hydrogen-Molecule Dissociating Radiation during Cosmic Reionization
• Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
• The First Galaxies: Assembly with Black Hole Feedback
• Radiative feedback from an early X-ray background
• First results on the Epoch of Reionization from First Light with SARAS 2
• Growth of Linear Perturbations before the Era of the First Galaxies
• Simulations of Early Baryonic Structure Formation with Stream Velocity: II. The Gas Fraction
• The impact of the supersonic baryon-dark matter velocity difference on the z~20 21cm background
• Radiative Feedback from high mass X-ray binaries on the formation of the first galaxies and early reionization
• Simulations of the star-forming molecular gas in an interacting M51-like galaxy
• The Influence of Streaming Velocities on the Formation of the First Stars
• Simulations of Early Baryonic Structure Formation with Stream Velocity: I. Halo Abundance
• Cradles of the first stars: self-shielding, halo masses, and multiplicity
• The formation of the first cosmic structures and the physics of the z~20 Universe
• Is H3+ cooling ever important in primordial gas?
• Formation sites of Population III star formation: The effects of different levels of rotation and turbulence on the fragmentation behavior of primordial gas
• The First Stars: A Low-Mass Formation Mode
• The First Stars
• Constraining First Star Formation with 21cm-Cosmology
• Ultra-faint dwarf galaxies: unveiling the minimum mass of the first stars
• Globular Clusters and Dark Satellite Galaxies through the Stream Velocity
• The Ultimately Large Telescope -- what kind of facility do we need to detect Population III stars?
• Gas in Simulations of High Redshift Galaxies and Minihalos
• Primordial star clusters at extreme magnification
• Formation of the first stars
• Gas rich and gas poor structures through the stream velocity effect
• H2 self-shielding with non-LTE rovibrational populations: implications for cooling in protogalaxies
• How the First Stars Regulated Star Formation. II. Enrichment by Nearby Supernovae
• A new approach to determine optically thick H2 cooling and its effect on primordial star formation
• Signature of the first galaxies in JWST deep field observations
• Detecting strongly lensed supernovae at z ~ 5-7 with LSST
• First Structure Formation under the Influence of Gas-Dark Matter Streaming Velocity and Density: Impact of the Baryons-trace-dark matter Approximation
• The nonlinear evolution of baryonic overdensities in the early universe: Initial conditions of numerical simulations
• Formation of First Galaxies inside Density Peaks and Voids under the Influence of Dark Matter-Baryon Streaming Velocity, I: Initial Condition and Simulation Scheme

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• Cosmic Reionization May Still Have Started Early and Ended Late: Confronting Early Onset with CMB Anisotropy and 21 cm Global Signals
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• Globular Clusters and Streaming Velocities: Testing the new formation channel in high-resolution cosmological simulations
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• The First Billion Years in Seconds: An Effective Model for the 21-cm Signal with Population III Stars
• The Impact of Molecular Hydrogen Cooling on the Galaxy Formation Threshold
• The THESAN-ZOOM project: Population III star formation continues until the end of reionization
• Dwarf galaxy formation with and without dark matter-baryon streaming velocities
• A Global Semi-Analytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
• The EDGES measurement disfavors an excess radio background during the cosmic dawn
• Effects of feedback-free starburst galaxies on the 21-cm signal and reionization history
• Predictions on the stellar-to-halo mass relation in the dwarf regime using the empirical model for galaxy formation EMERGE
• Aeos: Transport of Metals from Minihalos following Population III Stellar Feedback
• Relative baryon-dark matter velocities in cosmological zoom simulations
• What is the origin of the JWST SMBHs?
• Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
• Population III star formation: multiple gas phases prevent the use of an equation of state at high densities
• Impact of primordial black holes on the formation of the first stars and galaxies
• Halo Mergers Enhance the Growth of Massive Black Hole Seeds
• Primordial black holes as dark matter candidates: Multi-frequency constraints from cosmic radiation backgrounds
• The Hydrogen Mixing Portal, Its Origins, and Its Cosmological Effects
• Triggered Population III star formation: the effect of H${}_2$ self-shielding
• Radiation magnetohydrodynamics simulations of Population III star formation during the Epoch of Reionization
• The Effects of Dark Matter Annihilation and Dark Matter-Baryon Velocity Offsets at Cosmic Dawn
• The first stars
• Revealing the formation histories of the first stars with the cosmic near-infrared background
• From Dark Matter Minihalos to Large-Scale Radiative Feedback: A Self-Consistent 3D Simulation of the First Stars and Galaxies using Neural Networks
• LYRA II: Cosmological dwarf galaxy formation with inhomogeneous Population III enrichment
• Effect of the cosmological transition to metal-enriched star-formation on the hydrogen 21-cm signal