Assessing the impact of bulk and shear viscosities on large scale structure formation

C. M. S. Barbosa, H. Velten, J. C. Fabris, and Rudnei O. Ramos
Phys. Rev. D 96, 023527 – Published 24 July 2017

Abstract

The effects of both bulk and shear viscosities on the perturbations relevant for structure formation in late time cosmology are analyzed. It is shown that shear viscosity can be as effective as the bulk viscosity at suppressing the growth of perturbations and delaying the nonlinear regime. A statistical analysis of the shear and bulk viscous effects is performed, and some constraints on these viscous effects are given.

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  • Received 20 June 2017

DOI:https://doi.org/10.1103/PhysRevD.96.023527

© 2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Gravitation, Cosmology & Astrophysics

Authors & Affiliations

C. M. S. Barbosa*, H. Velten, and J. C. Fabris

  • Universidade Federal do Espírito Santo, Avenida Fernando Ferrari, Goiabeiras 29075-910, Vitória, Brasil

Rudnei O. Ramos§

  • Universidade do Estado do Rio de Janeiro, Departamento de Física Teórica, 20550-013 Rio de Janeiro, RJ, Brazil and Physics Department, McGill University, Montreal, Quebec H3A 2T8, Canada

  • *carolina.barbosa@aluno.ufes.br
  • velten@pq.cnpq.br
  • fabris@pq.cnpq.br
  • §rudnei@uerj.br

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Issue

Vol. 96, Iss. 2 — 15 July 2017

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