1.2k citations · 18.2k across the 129 of their papers we have counts for
9 papers · 2 filters
The Epoch of Helium Reionization
Aaron Sokasian, Tom Abel, Lars. E. Hernquist
We study the reionization of Helium II by quasars using a numerical approach that combines 3D radiative transfer calculations with cosmological hydrodynamical simulations. Sources…
Achieving Extreme Resolution in Numerical Cosmology Using Adaptive Mesh Refinement: Resolving Primordial Star Formation
Greg L. Bryan, Tom Abel, Michael L. Norman
As an entry for the 2001 Gordon Bell Award in the "special" category, we describe our 3-d, hybrid, adaptive mesh refinement (AMR) code, Enzo, designed for high-resolution, multiphy…
Evolution and Explosion of Very Massive Primordial Stars
A. Heger, S. E. Woosley, I. Baraffe +1
While the modern stellar IMF shows a rapid decline with increasing mass, theoretical investigations suggest that very massive stars (>100 solar masses) may have been abundant in th…
On the "initial" Angular Momentum of Galaxies
Tom Abel, Rupert C. Croft, Lars Hernquist
Spherical density profiles and specific angular momentum profiles of Dark Matter halos found in cosmological N-body simulations have been measured extensively. The distribution of…
Adaptive Ray Tracing for Radiative Transfer around Point Sources
Tom Abel, Benjamin D. Wandelt
We describe a novel adaptive ray tracing scheme to solve the equation of radiative transfer around point sources in hydrodynamical simulations. The angular resolution adapts to the…
Radio Foregrounds for the 21cm Tomography of the Neutral Intergalactic Medium at High Redshifts
Tiziana Di Matteo, Rosalba Perna, Tom Abel +1
Absorption or emission against the cosmic microwave background radiation (CMB) may be observed in the redshifted 21cm line if the spin temperature of the neutral intergalactic medi…
Cosmological Hydrogen Reionization with Three Dimensional Radiative Transfer
Alexei O. Razoumov, Michael L. Norman, Tom Abel +1
We present new calculations of the inhomogeneous process of cosmological reionization by carefully following the radiative transfer in pre-computed hydrodynamical simulations of ga…
Multi--dimensional Cosmological Radiative Transfer with a Variable Eddington Tensor Formalism
Nickolay Y. Gnedin, Tom Abel
We present a new approach to numerically model continuum radiative transfer based on the Optically Thin Variable Eddington Tensor (OTVET) approximation. Our method insures the exac…
Simulating Reionization in Numerical Cosmology
Aaron Sokasian, Tom Abel, Lars E. Hernquist
The incorporation of radiative transfer effects into cosmological hydrodynamical simulations is essential for understanding how the intergalactic medium (IGM) makes the transition…