Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 387, Issue 1, Pages 295-307Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2008.13223.x
Keywords
radiative transfer; methods : numerical; methods : N-body simulations
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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 photoheating, ATON is able to reproduce the results of other schemes on a various set of standard tests such as the expansion of a H II 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.
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