Fully Threaded Transport Engine: New Method for Multi-Scale Radiative Transfer

Abstract

A new, very fast method for 3D radiative transfer on fully threaded grids with arbitrarily high angular resolution is presented. The method uses completely cell-based discretization, and is ideally suited for problems with diffuse background radiation, often encountered in cosmological and star formation models. We find that for accurate statistical study of intergalactic Ly-alpha absorption lines one needs of order of few hundred angular discretization elements even for models without radiative feedback from star forming galaxies.

6 pages, 4 figures, submitted to MNRAS

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• Lyman alpha Radiative Transfer in Cosmological Simulations using Adaptive Mesh Refinement
• The simulated 21 cm signal during the epoch of reionization : full modeling of the Ly-alpha pumping
• An implementation of radiative transfer in the cosmological simulation code GADGET
• The First Galaxies: Assembly under Radiative Feedback from the First Stars
• SPHRAY: A Smoothed Particle Hydrodynamics Ray Tracer for Radiative Transfer
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• RADAMESH: Cosmological Radiative Transfer for Adaptive Mesh Refinement Simulations
• SimpleX2: radiative transfer on an unstructured, dynamic grid
• Adaptive Mesh Refinement Simulations of the Ionization Structure and Kinematics of Damped Ly$\alpha$ Systems with Self-consistent Radiative Transfer
• Fully-Coupled Simulation of Cosmic Reionization. I: Numerical Methods and Tests
• Urchin: A Reverse Ray Tracer for Astrophysical Applications
• A novel approach for accurate radiative transfer in cosmological hydrodynamic simulations
• LOC program for line radiative transfer
• ARGOT: Accelerated radiative transfer on grids using oct-tree
• Can gravitational infall energy lead to the observed velocity dispersion in DLAs?
• Radiation Hydrodynamics using Characteristics on Adaptive Decomposed Domains for Massively Parallel Star Formation Simulations
• On the spin-temperature evolution during the epoch of reionization
• A fast tree-based method for estimating column densities in Adaptive Mesh Refinement codes Influence of UV radiation field on the structure of molecular clouds
• Three-Dimensional Modelling of Ionized Gas. I. Did very massive stars of different metallicities drive the second cosmic reionization?
• Cosmological radiative transfer for the line-of-sight proximity effect
• Enabling Radiative Transfer on AMR grids in CRASH
• 3D Photon Conserving Code for Time-dependent General Relativistic Radiative Transfer : CARTOON