Radiative transfer through the Intergalactic Medium

Abstract

We use a probabilistic method to compute the propagation of an ionization front corresponding to the re-ionization of the intergalactic medium in a LCDM cosmology, including both hydrogen and helium. The effects of radiative transfer substantially boost the temperature of the ionized gas over the case of uniform re-ionization. The resulting temperature-density relation of the ionized gas is both non-monotonic and multiple-valued, reflecting the non-local character of radiative transfer and suggesting that a single polytropic relation between local gas density and temperatue is a poor description of the thermodynamic state of baryons in the post-reionization universe.

arXiv comment5 pages, 7 figures, letter accepted for publication in MNRAS

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Cited by in corpus (50)

• A New Calculation of the Ionizing Background Spectrum and the Effects of HeII Reionization
• Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
• The Physics of the Intergalactic Medium
• The First Cosmic Structures and their Effects
• New Measurements of the Ionizing Ultraviolet Background over 2 < z < 5 and Implications for Hydrogen Reionization
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• Evolution of the Intergalactic Opacity: Implications for the Ionizing Background, Cosmic Star Formation, and Quasar Activity
• The Evolution of Optical Depth in the Ly-alpha Forest: Evidence Against Reionization at z~6
• C^2-Ray: A new method for photon-conserving transport of ionizing radiation
• The Lyman-alpha forest opacity and the metagalactic hydrogen ionization rate at z~2-4
• Formation of Isolated Dwarf Galaxies with Feedback
• The nature and evolution of the highly ionized near-zones in the absorption spectra of z~6 quasars
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• Reionization and high-redshift galaxies: the view from quasar absorption lines
• Probing the thermal state of the intergalactic medium at $z>5$ with the transmission spikes in high-resolution Ly$\alpha$ forest spectra
• The photoheating of the intergalactic medium in synthesis models of the UV background
• Self-Consistent Modeling of Reionization in Cosmological Hydrodynamical Simulations
• A consistent determination of the temperature of the intergalactic medium at redshift z=2.4
• Cosmological parameters sigma_8, the baryon density, and the UV background intensity from a calibrated measurement of H I Lyman-alpha absorption at z = 1.9
• A first direct measurement of the intergalactic medium temperature around a quasar at z=6
• Reionisation scenarios and the temperature of the IGM
• The Equation of State of the Intergalactic Medium After Hydrogen Reionization
• Photo-heating and the fate of hard photons during the reionisation of HeII by quasars
• Multi-frequency, thermally coupled radiative transfer with TRAPHIC: Method and tests
• The effect of intergalactic helium on hydrogen reionisation: implications for the sources of ionising photons at z > 6
• Spatial fluctuations in the spectral shape of the UV background at 2<z<3 and the reionization of helium
• A New Method to Directly Measure the Jeans Scale of the Intergalactic Medium Using Close Quasar Pairs
• Quasar Ionization Front Lyα Emission in an Inhomogeneous Intergalactic Medium
• Radiative Transfer Effects on the Lya Forest
• Chemical enrichment of Damped Lyman Alpha systems as a direct constraint on Population III star formation
• Tightening Constraints from the Lyman Alpha Forest with the Flux Probability Distribution Function
• Inhomogeneous Helium Reionization and the Equation of State of the Intergalactic Medium
• The impact of helium reionization on the structure of the intergalactic medium
• Thermal constraints on the reionisation of hydrogen by population-II stellar sources
• Radiative transfer of energetic photons: X-rays and helium ionization in C2-Ray
• Reionization Bias in High Redshift Quasar Near-Zones
• The evolution of the Lyman-alpha forest effective optical depth following HeII reionisation
• Helium reionization and the thermal proximity effect
• The Effect of Large-Scale Power on Simulated Spectra of the Lya forest
• Patchy blazar heating: diversifying the thermal history of the intergalactic medium
• Heating and Ionization of the Primordial Intergalactic Medium by High Mass X-ray Binaries
• [O II] nebular emission from Mg II absorbers: Star formation associated with the absorbing gas
• The effect of recombination radiation on the temperature and ionization state of partially ionized gas
• The Lyman-alpha forest at redshifts 0.1 -- 1.6: good agreement between a large hydrodynamic simulation and HST spectra
• Constraining the temperature-density relation of the intergalactic medium with the Lyman-$\alpha$ and $\beta$ forests
• The HeII Lyman alpha forest and the thermal state of the IGM
• PINION: Physics-informed neural network for accelerating radiative transfer simulations for cosmic reionization
• A comparison of numerical methods for computing the reionization of intergalacitc hydrogen and helium by a central radiating source
• The effect of helium reionization on the Lyman-alpha forest hydrogen flux statistics
• The 21-cm signature of X-ray heated halos around galaxies during cosmic dawn