371 citations · 7.1k across the 127 of their papers we have counts for
60 papers · 1 filter
The Inhomogeneous Background of H2 Dissociating Radiation During Cosmic Reionization
Kyungjin Ahn, Paul R. Shapiro, Ilian T. Iliev +2
The first, self-consistent calculations of the cosmological H_2 dissociating UV background produced during the epoch of reionization (EOR) by the sources of reionization are presen…
The Inhomogeneous Background of Hydrogen-Molecule Dissociating Radiation during Cosmic Reionization
Kyungjin Ahn, Paul R. Shapiro, Ilian T. Iliev +2
The first, self-consistent calculations are presented of the cosmological, H2-dissociating UV background produced during the epoch of reionization by the sources of reionization. L…
The Theory and Simulation of the 21-cm Background from the Epoch of Reionization
Paul R. Shapiro, Ilian T. Iliev, Garrelt Mellema +2
The redshifted 21-cm line of distant neutral H atoms provides a probe of the cosmic ``dark ages'' and the epoch of reionization (``EOR'') which ended them. The radio continuum prod…
Simulating Cosmic Reionization
Ilian T. Iliev, Paul R. Shapiro, Garrelt Mellema +2
The Cosmic Dark Ages and the Epoch of Reionization constitute a crucial missing link in our understanding of the evolution of the intergalactic medium and the formation and evoluti…
The Cluster-Merger Shock in 1E 0657-56
Jun Koda, Milos Milosavljevic, Paul R. Shapiro +2
The merging galaxy cluster 1E 0657-56, known as the "bullet cluster," is one of the hottest clusters known. The X-ray emitting plasma exhibits bow-shock-like temperature and densit…
On The Survival and Abundance of Disk-dominated Galaxies
Jun Koda, Milos Milosavljevic, Paul R. Shapiro
We study the formation of disk-dominated galaxies in a Lambda CDM universe. Their existence is considered to be a challenge for the Lambda CDM cosmology, because galaxy mergers iso…
Effect of the intergalactic environment on the observability of Ly-alpha emitters during reionization
Ilian T. Iliev, Paul R. Shapiro, Patrick McDonald +2
Observations of high-redshift Ly-alpha sources are a major tool for studying the high-redshift Universe. We discuss the effect of the reionizing intergalactic medium on the observa…
Simulating Reionization: Character and Observability
Ilian T. Iliev, Paul R. Shapiro, Garrelt Mellema +3
In recent years there has been considerable progress in our understanding of the nature and properties of the reionization process. In particular, the numerical simulations of this…
Feedback from first radiation sources: H- photodissociation
Leonid Chuzhoy, Michael Kuhlen, Paul R. Shapiro
During the epoch of reionization, the formation of radiation sources is accompanied by the growth of a H- photodissociating flux. We estimate the impact of this flux on the formati…
The Cluster-Merger Shock in 1E 0657-56: Faster than the Speeding Bullet?
Milos Milosavljevic, Jun Koda, Daisuke Nagai +2
Shock waves driven in the intergalactic medium during the merging of galaxy clusters have been observed in X-ray imaging and spectroscopy. Fluid motions inferred from the shock str…
Current models of the observable consequences of cosmic reionization and their detectability
Ilian T. Iliev, Garrelt Mellema, Ue-Li Pen +2
A number of large current experiments aim to detect the signatures of the Cosmic Reionization at redshifts z>6. Their success depends crucially on understanding the character of th…
The Signature of Patchy Reionization in the Polarization Anisotropy of the CMB
Olivier Doré, Gil Holder, Marcelo Alvarez +4
The inhomogeneous ionization state of the universe when the first sources of ionizing radiation appeared should lead to anisotropies in the polarization of the cosmic microwave bac…
The Kinetic Sunyaev-Zel'dovich Effect from Patchy Reionization: the View from the Simulations
Ilian T. Iliev, Ue-Li Pen, J. Richard Bond +2
We present the first calculation of the kinetic Sunyaev-Zel'dovich (kSZ) effect due to the inhomogeneus reionization of the universe based on detailed large-scale radiative transfe…
Self-regulated reionization
Ilian T. Iliev, Garrelt Mellema, Paul R. Shapiro +1
Recently, we have presented the first large-scale radiative transfer simulations of reionization. Here we present new simulations which extend the source halo mass range downward t…
Recognizing the First Radiation Sources Through Their 21-cm Signature
Leonid Chuzhoy, Marcelo A. Alvarez, Paul R. Shapiro
At the beginning of the reionization epoch, radiation sources produce fluctuations in the redshifted 21-cm background. We show that different types of sources (such as miniquasars,…
Heating and cooling of the intergalactic medium by resonance photons
Leonid Chuzhoy, Paul R. Shapiro
During the epoch of reionization a large number of photons were produced with frequencies below the hydrogen Lyman limit. After redshifting into the closest resonance, these photon…
Cosmological Radiative Transfer Codes Comparison Project I: The Static Density Field Tests
Ilian T. Iliev, Benedetta Ciardi, Marcelo A. Alvarez +13
Radiative transfer simulations are now at the forefront of numerical astrophysics. They are becoming crucial for an increasing number of astrophysical and cosmological problems; at…
Dynamical HII Region Evolution in Turbulent Molecular Clouds
Garrelt Mellema, S. Jane Arthur, William J. Henney +2
We present numerical radiation-hydrodynamic simulations of the evolution of HII regions formed in an inhomogeneous medium resulting from turbulence simulations. We find that the fi…
The 21 Centimeter Background from the Cosmic Dark Ages: Minihalos and the Intergalactic Medium before Reionization
Paul R. Shapiro, Kyungjin Ahn, Marcelo A. Alvarez +3
The H atoms inside minihalos (i.e. halos with virial temperatures T_vir < 10^4 K, in the mass range roughly from 10^4 M_sun to 10^8 M_sun) during the cosmic dark ages in a LambdaCD…
UV pumping of hyperfine transitions in the light elements, with application to 21-cm hydrogen and 92-cm deuterium lines from the early universe
Leonid Chuzhoy, Paul R. Shapiro
We present new analytic calculations of the coupling between ultraviolet resonance photons and the population of the hyperfine states in the light elements (H, D, He3+) which inclu…
Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
Ilian T. Iliev, Garrelt Mellema, Ue-Li Pen +3
We present the first large-scale radiative transfer simulations of cosmic reionization, in a simulation volume of (100/h Mpc)^3, while at the same time capturing the dwarf galaxies…
The Cosmic Reionization History as Revealed by the CMB Doppler--21-cm Correlation
Marcelo A. Alvarez, Eiichiro Komatsu, Olivier Doré +1
We show that the epoch(s) of reionization when the ionization fraction of the universe is about half can be determined by correlating Cosmic Microwave Background (CMB) temperature…
The effect of minihaloes on cosmic reionization
B. Ciardi, E. Scannapieco, F. Stoehr +3
One of the most debated issues in the theoretical modeling of cosmic reionization is the impact of small-mass gravitationally-bound structures. We carry out the first numerical inv…
Understanding the Equilibrium Structure of CDM Halos
Paul R. Shapiro, Kyungjin Ahn, Marcelo Alvarez +2
N-body simulations find a universal structure for the halos which result from the nonlinear growth of Gaussian-random-noise density fluctuations in the CDM universe. This talk summ…