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

Assessing the impact of bulk and shear viscosities on large scale structure formation 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

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

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

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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Publisher
American Physical Society (APS)
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.96.023527
Publisher site
See Article on Publisher Site

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.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jul 15, 2017

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