Effect of peculiar velocities on the gravitational potential in cosmological models with perfect fluids

Burgazli, Alvina; Shulga, V. M.; Yükselci, A. Emrah; Zhuk, Alexander

doi:10.1016/j.physletb.2020.135761

Cited by 2 publications

(2 citation statements)

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“…To determine the expression for ζ J , we now take the gradient of (34), which yields 27) and acting on with the inverse Laplacian, we obtain…”

Section: Appendix A1: Pressureless Mattermentioning

confidence: 99%

“…Matter sources in [17] have the form of discrete point-like masses, and it is also important to emphasize that no assumptions are made regarding the smallness of the associated energy density contrast, ensuring the validity of the model both at sub-and super-horizon scales. This approach has been further developed in the papers [18][19][20][21][22][23][24][25][26][27]. Particularly in [18,19], generalizations to the case of perfect fluids with the linear p = ωε and nonlinear p = f (ε) equations of state have been performed, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Scalar and vector perturbations in a universe with nonlinear perfect fluid

et al. 2021

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We study a three-component universe filled with dust-like matter in the form of discrete inhomogeneities (e.g., galaxies) and perfect fluids characterized by linear and nonlinear equations of state. Within the cosmic screening approach, we develop the theory of scalar and vector perturbations. None of the energy density contrasts associated with the distinct components is treated as small. Consequently, the derived equations are valid at both sub- and super-horizon scales and enable simulations for a variety of cosmological models.

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“…To determine the expression for ζ J , we now take the gradient of (34), which yields 27) and acting on with the inverse Laplacian, we obtain…”

Section: Appendix A1: Pressureless Mattermentioning

confidence: 99%