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Modelling the uv/x-ray cosmic background with CUBA

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arxiv astro-ph/0106018 v1 pith:RTJWUTU6 submitted 2001-06-01 astro-ph

Modelling the uv/x-ray cosmic background with CUBA

classification astro-ph
keywords backgroundcubaheiiwillcosmicevolutionionizationrates
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper, I will describe the features of the numerical code CUBA, aimed at the solution of the radiative transfer equation in a cosmological context. CUBA will be soon available for public use at the URL http://pitto.mib.infn.it/~haardt/, allowing for several user-supplied input parameters, such as favourite cosmology, luminosity functions, Type II object evolution, stellar spectra, and many others. I will also present some new results of the UV/X-ray cosmic background as produced by the observed populations of QSOs and star forming galaxies, updating and extending our previous works. The background evolution is complemented with a number of derived quantities such as the ionization and thermal state of the IGM, the HeII opacity, the HI and HeII ionization rates, and the HI, HeII and Compton heating rates.

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