Rosseland and Planck mean opacities for primordial matter

Abstract

We present newly calculated low-temperature opacities for gas with a primordial chemical composition. In contrast to earlier calculations which took a pure metal-free Hydrogen/Helium mixture, we take into account the small fractions of Deuterium and Lithium as resulting from Standard Big Bang Nucleosynthesis. Our opacity tables cover the density range -16 < log rho [g cm^{-3}] < -2 and temperature range of 1.8 < T [K] < 4.6, while previous tables were usually restricted to T > 10^3 K. We find that, while the presence of Deuterium does not significantly alter the opacity values, the presence of Lithium gives rise to major modifications of the opacities, at some points increasing it by approximately 2 orders of magnitude relative to pure Hydrogen/Helium opacities.

arXiv comment16 pages, 8 figures, submitted to MNRAS, all figures in grey-scale and at reduced resolution, for high-res colour PDF see http://www.ita.uni-heidelberg.de/~mm/publications/MayerDuschl-2.pdf

References in corpus (11)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Rosseland and Planck Mean Opacities for Protoplanetary Discs
• Modelling Primordial Gas in Numerical Cosmology
• Updated Big Bang Nucleosynthesis confronted to WMAP observations and to the Abundance of Light Elements
• Accretion onto a Primordial Protostar
• A more detailed look at the Opacities for Enriched Carbon and Oxygen Mixtures
• Lithium hydride in the early universe and in protogalactic clouds
• Deuterium chemistry in the primordial gas
• Model Atmosphere Analysis of Two Very Cool White Dwarfs
• Comparing gas-phase and grain-catalyzed H2 formation
• The effect of the electron donor H3+ on the pre-main and Main Sequence evolution of low mass zero metallicity stars

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