Self-consistent semi-analytic models of the first stars

Abstract

We have developed a semi-analytic framework to model the large-scale evolution of the first Population III (Pop III) stars and the transition to metal-enriched star formation. Our model follows dark matter halos from cosmological N-body simulations, utilizing their individual merger histories and three-dimensional positions, and applies physically motivated prescriptions for star formation and feedback from Lyman-Werner (LW) radiation, hydrogen ionizing radiation, and external metal enrichment due to supernovae winds. This method is intended to complement analytic studies, which do not include clustering or individual merger histories, and hydrodynamical cosmological simulations, which include detailed physics, but are computationally expensive and have limited dynamic range. Utilizing this technique, we compute the cumulative Pop III and metal-enriched star formation rate density (SFRD) as a function of redshift at $z\ge 20$. We find that varying the model parameters leads to significant qualitative changes in the global star formation history. The Pop III star formation efficiency and the delay time between Pop III and subsequent metal-enriched star formation are found to have the largest impact. The effect of clustering (i.e. including the three-dimensional positions of individual halos) on various feedback mechanisms is also investigated. The impact of clustering on LW and ionization feedback is found to be relatively mild in our fiducial model, but can be larger if external metal enrichment can promote metal-enriched star formation over large distances.

11 pages, 6 figures, replaced with version accepted by MNRAS

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Cited by in corpus (35)

• Semi-analytic forecasts for JWST - I. UV luminosity functions at z = 4 - 10
• Descendants of the first stars: the distinct chemical signature of second generation stars
• Are the ultra-high-redshift galaxies at z > 10 surprising in the context of standard galaxy formation models?
• Cradles of the first stars: self-shielding, halo masses, and multiplicity
• Semi-analytic forecasts for JWST -- IV. Implications for cosmic reionization and LyC escape fraction
• The critical dark matter halo mass for Population III star formation: dependence on Lyman-Werner radiation, baryon-dark matter streaming velocity, and redshift
• Predicting the locations of possible long-lived low-mass first stars: Importance of satellite dwarf galaxies
• The Persistence of Population III Star Formation
• The Effects of Population III X-ray and Radio Backgrounds on the Cosmological 21-cm Signal
• Public Release of A-SLOTH: Ancient Stars and Local Observables by Tracing Halos
• The Universe at extreme magnification
• Self-consistent Semi-analytic Modeling of Feedback During Primordial Star Formation and Reionization
• Early Structure Formation Constraints on the Ultra-Light Axion in the Post-Inflation Scenario
• Semi-analytic forecasts for JWST -- V. AGN luminosity functions and helium reionization at z = 2-7
• Impact of the Primordial Stellar Initial Mass Function on the 21-cm Signal
• A tale of two sites -- II: Inferring the properties of minihalo-hosted galaxies with upcoming 21-cm interferometers
• Implications of inhomogeneous metal mixing for stellar archaeology
• A self-consistent semi-analytic model for Population III star formation in minihalos
• Constraining Warm Dark Matter and Pop III stars with the Global 21-cm Signal
• Probing Population III Initial Mass Functions with He II/H$\alpha$ Intensity Mapping
• Tracing stars in Milky Way satellites with A-SLOTH
• The role of Pop III stars and early black holes in the 21cm signal from Cosmic Dawn
• A Model-Insensitive Baryon Acoustic Oscillation Feature in the 21 cm Signal from Reionization
• Impact of Population III homogeneous stellar evolution on early cosmic reionisation
• Modelling Population III stars for semi-numerical simulations
• A-SLOTH: Ancient Stars and Local Observables by Tracing Halos
• The high-redshift tail of stellar reionization in LCDM is beyond the reach of the low-$\ell$ CMB
• A Global Semi-Analytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
• Black holes at cosmic dawn in the redshifted 21cm signal of HI
• Impact of cosmic rays on the global 21-cm signal during cosmic dawn
• Cosmological contribution from population III stars in ultracompact minihalos
• Radiation magnetohydrodynamics simulations of Population III star formation during the Epoch of Reionization
• The Anomalous 21-cm Absorption at High Redshifts
• Revealing the formation histories of the first stars with the cosmic near-infrared background
• Effect of the cosmological transition to metal-enriched star-formation on the hydrogen 21-cm signal