A radiative transfer scheme for cosmological reionization based on a local Eddington tensor

Dominique Aubert, Romain Teyssier

Research output: Contribution to journalArticlepeer-review

93 Scopus citations

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 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.

Original languageEnglish (US)
Pages (from-to)295-307
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume387
Issue number1
DOIs
StatePublished - Jun 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Methods: N-body simulations
  • Methods: numerical
  • Radiative transfer

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