A radiative transfer scheme for cosmological reionization based on a local Eddington tensor
Abstract
A radiative transfer scheme is presented, based on a moment description of the equation of radiative transfer and the so-called ``M1 closure model'' for the Eddington tensor. This model features a strictly hyperbolic transport step for radiation: it has been implemented using standard Godunov--like techniques in a new code called ATON. Coupled to simple models of ionization chemistry and photo-heating, ATON is able to reproduce the results of other schemes on a various set of standard tests such as the expansion of a HII region, the shielding of the radiation by dense clumps and cosmological ionization by multiple sources. Being simple yet robust, such a scheme is intended to be naturally and easily included in grid--based cosmological fluid solvers.
Cite
@article{arxiv.0709.1544,
title = {A radiative transfer scheme for cosmological reionization based on a local Eddington tensor},
author = {Dominique Aubert and Romain Teyssier},
journal= {arXiv preprint arXiv:0709.1544},
year = {2009}
}
Comments
14 pages, 13 figures, submitted to MNRAS