Matter Growth in Imperfect Fluid Cosmology
PPGCosmo & Núcleo Cosmo-UFES, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, Campus de Goiabeiras, CEP 29075-910 Vitória, Espírito Santo, Brazil
Departamento de Física, Universidade Federal de Ouro Preto (UFOP), CEP 35400-000 Ouro Preto, Minas Gerais, Brazil
Departamento de Física, Universidade Federal do Paraná, 81531-980 Curitiba, Paraná, Brazil
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 2 November 2018 / Revised: 24 February 2019 / Accepted: 25 February 2019 / Published: 4 March 2019
PDF [628 KB, uploaded 4 March 2019]
Extensions of Einstein’s General Relativity (GR) can formally be given a GR structure in which additional geometric degrees of freedom are mapped on an effective energy-momentum tensor. The corresponding effective cosmic medium can then be modeled as an imperfect fluid within GR. The imperfect fluid structure allows us to include, on a phenomenological basis, anisotropic stresses and energy fluxes which are considered as potential signatures for deviations from the cosmological standard
CDM) model. As an example, we consider the dynamics of a scalar-tensor extension of the standard model, the
CDM model. We constrain the magnitudes of anisotropic pressure and energy flux with the help of redshift-space distortion (RSD) data for the matter growth function
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Share & Cite This Article
MDPI and ACS Style
Zimdahl, W.; Velten, H.E.; Algoner, W.C. Matter Growth in Imperfect Fluid Cosmology. Universe 2019, 5, 68.
Zimdahl W, Velten HE, Algoner WC. Matter Growth in Imperfect Fluid Cosmology. Universe. 2019; 5(3):68.
Zimdahl, Winfried; Velten, Hermano E.; Algoner, William C. 2019. "Matter Growth in Imperfect Fluid Cosmology." Universe 5, no. 3: 68.
Show more citation formats
Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
[Return to top]
For more information on the journal statistics, click here
Multiple requests from the same IP address are counted as one view.