On the minimum mass of reionization sources

Abstract

By means of carefully calibrated semi-analytical reionization models, we estimate the minimum mass of star-forming haloes required to match the current data. Models which do not include haloes of total mass M < 10^9 M_sun fail at reproducing the Gunn-Peterson and electron scattering optical depths simultaneously, as they contribute too few (many) photons at high (low, z \approx 6) redshift. Marginally acceptable solutions require haloes with M \approx 5 \times 10^7 M_sun at z \approx 10, corresponding to virial temperatures (\sim 10^4K) for which cooling can be ensured by atomic transitions. However, a much better match to the data is obtained if minihaloes (M \sim 10^6 M_sun) are included in the analysis. We have critically examined the assumptions made in our model and conclude that reionization in the large-galaxies-only scenario can remain viable only if metal-free stars and/or some other exotic sources at z > 6 are included.

6 pages, 2 figures

References in corpus (25)

• Stellar population synthesis at the resolution of 2003
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• The Dependence of Star Formation History and Internal Structure on Stellar Mass for 10^5 Low-Redshift Galaxies
• Effect of Reionization on the Structure Formation in the Universe
• Reionization of the Inhomogeneous Universe
• The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• Implications for the Cosmic Reionization from the Optical Afterglow Spectrum of the Gamma-Ray Burst 050904 at z = 6.3
• Population III star formation in a Lambda CDM universe, II: Effects of a photodissociating background
• The Lyman-alpha forest opacity and the metagalactic hydrogen ionization rate at z~2-4
• The Evolution of the Intergalactic Medium Transmission to Redshift Six
• Self-regulated reionization
• Experimental Constraints on Self-consistent Reionization Models
• Was Star-Formation Suppressed in High-Redshift Minihalos?
• The Role of the Dust in Primeval Galaxies: A Simple Physical Model for Lyman Break Galaxies and Lyman Alpha Emitters
• Constraints on the ionization sources of the high redshift intergalactic medium
• The Lyman-alpha forest and WMAP year three
• A New Measurement of the Stellar Mass Density at z~5: Implications for the Sources of Cosmic Reionization
• Constraining the reionization history with QSO absorption spectra
• Updating reionization scenarios after recent data
• Searching for the reionization sources
• Constraining the Quasar Contribution to the Reionisation of Cosmic Hydrogen
• Are There Enough Ionizing Photons to Reionize the Universe by z=6?
• Reionization Bias in High Redshift Quasar Near-Zones

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• Accelerated Evolution of Ly$\alpha$ Luminosity Function at $\text{z}\gtrsim 7$ Revealed by the Subaru Ultra-Deep Survey for Ly$\alpha$ Emitters at $\text{z}=7.3$
• Simulating cosmic metal enrichment by the first galaxies
• Simulating high-redshift galaxies
• Pushing back the limits: detailed properties of dwarf galaxies in a LCDM universe
• Was reionization complete by z ~ 5-6?
• The Evolution of 21-cm Structure (EOS): public, large-scale simulations of Cosmic Dawn and Reionization
• A new perspective on globular clusters, their initial mass function, and their contribution to the stellar halo and to cosmic reionisation
• The Global History of Reionisation
• The first (nearly) model-independent constraint on the neutral hydrogen fraction at z~5--6
• Metals in the IGM approaching the re-ionization epoch: results from X-shooter at the VLT
• The ALMA REBELS Survey. Epoch of Reionization giants: properties of dusty galaxies at $z\approx 7$
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