Modelling the uv/x-ray cosmic background with CUBA

By F. Haardt, P. Madau. 2001

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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 this http URL, 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.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/b08e513d01adda92ad17fd730d61dd9dcc50686f

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In Astronomy and Astrophysics

Citations in the corpus

The BAHAMAS project: Calibrated hydrodynamical simulations for large-scale structure cosmology (2016, background): “The rates account for heating/cooling due to the primary CMB and a Haardt & Madau (2001) ultra-violet/X-ray photoionizing background.”
The EAGLE simulations of galaxy formation: the importance of the hydrodynamics scheme (2015, methodology): “Radiative cooling is implemented using element-by-element rates (Wiersma et al. 2009a) for the 11 most important metals in the presence of the CMB and UV/X-ray backgrounds given by Haardt & Madau (2001).”
The formation and assembly history of the Milky Way revealed by its globular cluster population (2018, background): “Most importantly, these include radiative cooling and photoionization heating (Wiersma et al. 2009a), a redshift-dependent UV background (Haardt & Madau 2001), stochastic star formation within gas with density above a metallicity-dependent threshold (Schaye 2004; Schaye & Dalla Vecchia 2008),…”
Gas expulsion by quasar-driven winds as a solution to the overcooling problem in galaxy groups and clusters (2010, methodology): “…with the CLOUDY software package, last described in Ferland et al. 1998) that contain cooling rates as a function of density, temperature and redshift calculated in the presence of the cosmic microwave background and the Haardt & Madau (2001) UV/X-ray background (see Wiersma, Schaye & Smith 2009a).”
The impact of star formation feedback on the circumgalactic medium (2016, background): “All gas is assumed to be in ionization equilibrium with the photoionizing photons coming from the meta-galactic UV/X- MNRAS 000, 1–19 (2016) ray background (Haardt & Madau 2001), i.e., no local sources.”
Galaxies in a simulated ΛCDM universe – II. Observable properties and constraints on feedback (2009, background): “The background flux starts at z = 9 and is based on Haardt & Madau (2001) (for more details about the calculation of this UV background, see Oppenheimer & Davé 2006).”