Photon Conserving Radiative Transfer around Point Sources in multi-dimensional Numerical Cosmology

Details Photon Conserving Radiative Transfer around Point Sources in multi-dimensional Numerical Cosmology Photon Conserving Radiative Transfer around Point Sources in multi-dimensional Numerical Cosmology

1998-12-08

arxiv.org/abs/astro-ph/9812151v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, submitted to ApJL

Scientific paper

10.1086/307739

Many questions in physical cosmology regarding the thermal and ionization history of the intergalactic medium are now successfully studied with the help of cosmological hydrodynamical simulations. Here we present a numerical method that solves the radiative transfer around point sources within a three dimensional cartesian grid. The method is energy conserving independently of resolution: this ensures the correct propagation speeds of ionization fronts. We describe the details of the algorithm, and compute as first numerical application the ionized region surrounding a mini-quasar in a cosmological density field at z=7.

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