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22 September 2020
  » arxiv » astro-ph/0312009

 Article overview

Bulk Viscosity in Hybrid Stars
A. Drago ; A. Lavagno ; G. Pagliara ;
Date 29 Nov 2003
Journal Phys.Rev. D71 (2005) 103004
Subject astro-ph gr-qc hep-ph nucl-th
AffiliationDipartimento di Fisica, Universita’ di Ferrara and INFN, Sezione di Ferrara, Italy. Dipartimento di Fisica, Politecnico di Torino and INFN, Sezione di Torino, Italy.
AbstractWe compute the bulk viscosity of a mixed quark-hadron phase. In the first scenario to be discussed, the mixed phase occurs at large densities and we assume that it is composed of a mixing of hyperonic matter and quarks in the Color Flavor Locked phase. In a second scenario, the mixed phase occurs at lower densities and it is composed of a mixing of nucleons and unpaired quark matter. We have also investigated the effect of a non-vanishing surface tension at the interface between hadronic and quark matter. In both scenarios, the bulk viscosity is large when the surface tension is absent, while the value of the viscosity reduces in the second scenario when a finite value for the surface tension is taken into account. In all cases, the r-mode instabilities of the corresponding hybrid star are suppressed.
Source arXiv, astro-ph/0312009
Other source [GID 831144] astro-ph/0312009
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