Journal Article

<span class="smallCaps">crash</span>2: coloured packets and other updates

A. Maselli, B. Ciardi and A. Kanekar

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 393, issue 1, pages 171-178
Published in print February 2009 | ISSN: 0035-8711
Published online January 2009 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2008.14197.x
crash2: coloured packets and other updates

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In this paper, we report on the improvements implemented in the cosmological radiative transfer code crash. In particular, we present a new multi-frequency algorithm for spectra sampling which makes use of coloured photon packets: we discuss the need for the multi-frequency approach, describe its implementation and present the improved crash performance in reproducing the effects of ionizing radiation with an arbitrary spectrum. We further discuss minor changes in the code implementation which allow for more efficient performance and an increased precision.

Keywords: radiative transfer; methods: numerical; intergalactic medium; cosmology: theory

Journal Article.  5402 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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