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NEUTRINO OPACITIES AND THE PASTA PHASE STRUCTURE

DÉBORA PERES MENEZES

Depto de Física CFM, Universidade Federal de Santa Catarina, Florianópolis, SC CP.476, CEP 88.040-900, Brazil

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and

MARCELO DALLAGNOL ALLOY

Universidade Federal da Fronteira Sul, Chapecó, SC, CEP 89.812-000, Brazil

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https://doi.org/10.1142/S0218301311040256Cited by:0 (Source: Crossref)

Abstract

The diffusion coefficients that are related to the neutrino opacities are calculated in such a way that the formation of nuclear pasta and homogeneous matter at low densities are taken into account. Two methods are developed to build the pasta phase and their differences are outlined. One of them is chosen as part of a complete equation of state used in the calculation of the diffusion coefficients. Our results show that the mean free paths are significantly altered by the presence of nuclear pasta in stellar matter when compared with the results obtained with pure homogeneous matter. These differences in neutrino opacities will have consequences in the calculation of the Kelvin-Helmholtz phase of protoneutron stars.

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NEUTRINO OPACITIES AND THE PASTA PHASE STRUCTURE

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