Cradles of the first stars: self-shielding, halo masses, and multiplicity

Abstract

The formation of Population III (Pop III) stars is a critical step in the evolution of the early universe. To understand how these stars affected their metal-enriched descendants, the details of how, why and where Pop III formation takes place needs to be determined. One of the processes that is assumed to greatly affect the formation of Pop III stars is the presence of a Lyman-Werner (LW) radiation background, that destroys H${}_2$, a necessary coolant in the creation of Pop III stars. Self-shielding can alleviate the effect the LW background has on the H${}_2$ within haloes. In this work, we perform a cosmological simulation to study the birthplaces of Pop III stars, using the adaptive mesh refinement code Enzo. We investigate the distribution of host halo masses and its relationship to the LW background intensity. Compared to previous work, haloes form Pop III stars at much lower masses, up to a factor of a few, due to the inclusion of H${}_2$ self-shielding. We see no relationship between the LW intensity and host halo mass. Most haloes form multiple Pop III stars, with a median number of four, up to a maximum of 16, at the instance of Pop III formation. Our results suggest that Pop III star formation may be less affected by LW radiation feedback than previously thought and that Pop III multiple systems are common.

Accepted in MNRAS

References in corpus (18)

• The Formation of Population III Binaries from Cosmological Initial Conditions
• 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
• Fragmentation of star-forming clouds enriched with the first dust
• Resolving the Formation of Protogalaxies. III. Feedback from the First Stars
• Population III star formation in a Lambda CDM universe, I: The effect of formation redshift and environment on protostellar accretion rate
• Population III star formation in a Lambda CDM universe, II: Effects of a photodissociating background
• Formation of massive black holes in rapidly growing pre-galactic gas clouds
• The Birth of a Galaxy. II. The Role of Radiation Pressure
• Suppression of H_2 Cooling in the Ultraviolet Background
• Supersonic Gas Streams Enhance the Formation of Massive Black Holes in the Early Universe
• Metal-Free Gas Supply at the Edge of Reionization: Late-Epoch Population III Star Formation
• Fossils of Reionization in the Local Group
• Recovery from population III supernova explosions and the onset of second generation star formation
• Evidence for an aspherical Population III supernova explosion inferred from the hyper metal-poor star HE1327-2326
• Predicting the locations of possible long-lived low-mass first stars: Importance of satellite dwarf galaxies
• How an improved implementation of H2 self-shielding influences the formation of massive stars and black holes
• Lyman-Werner Escape Fractions from the First Galaxies

Cited by in corpus (63)

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• The critical dark matter halo mass for Population III star formation: dependence on Lyman-Werner radiation, baryon-dark matter streaming velocity, and redshift
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• A needle in a haystack? Catching Pop III stars in the Epoch of Reionization: I. Pop III star forming environments
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• Starbursts in low-mass haloes at Cosmic Dawn. I. The critical halo mass for star formation
• Gravitational wave of intermediate-mass black holes in Population III star clusters
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• Conditions for detecting lensed Population III galaxies in blind surveys with the James Webb Space Telescope, the Roman Space Telescope and Euclid
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• LYRA III: The smallest Reionization survivors
• Constraining Dark Matter properties with the first generation of stars
• Machine learning detects multiplicity of the first stars in stellar archaeology data
• Atomic and molecular gas from the epoch of reionization down to redshift 2
• Constraining Warm Dark Matter and Pop III stars with the Global 21-cm Signal
• Population III X-ray Binaries and their Impact on the Early Universe
• Seeding the second star -- II. CEMP star formation enriched from faint supernovae
• 21cmfish: Fisher-matrix framework for fast parameter forecasts from the cosmic 21-cm signal
• A-SLOTH reveals the nature of the first stars
• From dark matter halos to pre-stellar cores: High resolution follow-up of cosmological Lyman-Werner simulations
• Merging Hierarchical Triple Black Hole Systems with Intermediate-mass Black Holes in Population III Star Clusters
• Tracing stars in Milky Way satellites with A-SLOTH
• Globular Clusters and Streaming Velocities: Testing the new formation channel in high-resolution cosmological simulations
• External Enrichment of Minihalos by the First Supernovae
• Can Population III stars be major origins of both merging binary black holes and extremely metal poor stars?
• A hide-and-seek game: Looking for Population III stars during the Epoch of Reionization through the HeII$\lambda$1640 line
• Euclid detectability of pair instability supernovae in binary population synthesis models consistent with merging binary black holes
• A Metal-Free Galaxy at $z=3.19$? Evidence of Late Population III Star Formation at Cosmic Noon
• Chemical Diagnostics to Unveil Environments Enriched by First Stars
• The impact and response of minihalos and the inter-halo medium on cosmic reionization
• 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
• Dwarf galaxy formation with and without dark matter-baryon streaming velocities
• The THESAN-ZOOM project: Population III star formation continues until the end of reionization
• The high-redshift tail of stellar reionization in LCDM is beyond the reach of the low-$\ell$ CMB
• If dark matter is fuzzy, the first stars form in massive pancakes
• A Global Semi-Analytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
• Classifying binary black holes from Population III stars with the Einstein Telescope: A machine-learning approach
• Aeos: Transport of Metals from Minihalos following Population III Stellar Feedback
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• A survey of extremely metal-poor gas at cosmic noon: evidence of elevated [O/Fe]
• Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
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• Impact of Population III stars on the astrophysical gravitational-wave background
• Triggered Population III star formation: the effect of H${}_2$ self-shielding
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• Radiation magnetohydrodynamics simulations of Population III star formation during the Epoch of Reionization
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• Type Ia Supernovae from First-generation Stars
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• Revealing the formation histories of the first stars with the cosmic near-infrared background
• The Baryon Budget of Galaxies across the First Billion Years
• 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
• Intermediate-mass black holes and contribution to extragalactic background light from Population III stars in Milky Way-like galaxies