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

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arxiv 1702.07040 v3 pith:OF7B5B7M submitted 2017-02-22 astro-ph.CO gr-qchep-th

C.M.S. Barbosa , H. Velten , J. C. Fabris , Rudnei O. Ramos This is my paper · ORCID
classification astro-ph.COgr-qchep-th
keywords bulksheareffectsformationperturbationsstructureviscositiesviscosity
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It is analyzed the effects of both bulk and shear viscosities on the perturbations, relevant for structure formation in late time cosmology. It is shown that shear viscosity can be as effective as the bulk viscosity on 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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Cosmological scalar perturbations in Horndeski-like gravity

    gr-qc 2025-01 conditional novelty 4.0 of 10

    For a Horndeski-like scalar-tensor model with a chosen background solution, scalar stability and entropy-production bounds restrict the coupling gamma to be non-positive and constrain gamma*Lambda relative to alpha.

  2. Dissipative Cosmology and the Nature of Dark Energy: Insights from Bulk Viscosity with DESI DR2 observations

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Bulk viscous fluid models for dark energy yield improved fits to supernova, BAO, and CMB data over LambdaCDM, especially in the interacting non-minimal case.

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