Escape Fraction of Ionizing Radiation from Starburst Galaxies at High Redshifts

Abstract

Recent data indicates that the cosmic UV emissivity decreased with decreasing redshift z near the end of reionization. Lacking evidence for very massive early stars, this could signal a decline with time in the mass-averaged escape fraction of ionizing radiation from galaxies <fesc> at z > 6. We calculate the evolution of ionization fronts in dark matter halos which host gas in hydrostatic equilibrium at its cooling temperature floor (T~10^4 K for atomic hydrogen). We find a high escape fraction only for the lowest mass halos (with M< 10^8.7 Msun at (1+z)=10) provided their star formation efficiency f_star > 10^-3. Since the low-mass galaxy population is depleted by radiative feedback, we find that indeed <fesc> decreases with time during reionization.

9 pages, submitted to MNRAS

References in corpus (13)

• Massloss of galaxies due to a UV-background
• 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
• An extremely primitive halo star
• The Direct Detection of Lyman-Continuum Emission from Star-forming Galaxies at z~3
• Radiative transfer simulations of cosmic reionization I: methodology and initial results
• New Constraints on the Lyman Continuum Escape Fraction at z~1.3
• Ultra faint dwarfs: probing early cosmic star formation
• The performance of the blue prime focus Large Binocular Camera at the Large Binocular Telescope
• The First Galaxies: Assembly of Disks and Prospects for Direct Detection
• UV Radiative Feedback During the Advanced Stages of Reionization
• Escape fraction of ionizing photons from galaxies at z=0--6
• Lyman Alpha Driven Outflows Around Star Forming Galaxies
• Detectable Signatures of Cosmic Radiative Feedback

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