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

Alvina Burgazli; Valerii Shulga; A. Emrah Yükselci; Alexander Zhuk

doi:10.1016/j.physletb.2020.135761

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

Alvina Burgazli, Valerii Shulga, A. Emrah Yükselci, Alexander Zhuk^*

^*Corresponding author for this work

Department of Physics Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with ω=1/3, we obtain the expression for the gravitational potential in the integral form. Numerical calculation clearly demonstrates the modulation of the gravitational potential by acoustic oscillations due to the presence of peculiar velocities. We also show that peculiar velocities affect the gravitational potential in the case of the frustrated network of cosmic strings with ω=−1/3.

Original language	English
Article number	135761
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	809
DOIs	https://doi.org/10.1016/j.physletb.2020.135761
Publication status	Published - 10 Oct 2020

Bibliographical note

Publisher Copyright:
© 2020 The Author(s)

Keywords

Cosmology
Gravitational potential
Peculiar velocities
Scalar perturbations

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10.1016/j.physletb.2020.135761

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title = "Effect of peculiar velocities on the gravitational potential in cosmological models with perfect fluids",

abstract = "We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with ω=1/3, we obtain the expression for the gravitational potential in the integral form. Numerical calculation clearly demonstrates the modulation of the gravitational potential by acoustic oscillations due to the presence of peculiar velocities. We also show that peculiar velocities affect the gravitational potential in the case of the frustrated network of cosmic strings with ω=−1/3.",

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T1 - Effect of peculiar velocities on the gravitational potential in cosmological models with perfect fluids

AU - Burgazli, Alvina

AU - Shulga, Valerii

AU - Yükselci, A. Emrah

AU - Zhuk, Alexander

PY - 2020/10/10

Y1 - 2020/10/10

N2 - We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with ω=1/3, we obtain the expression for the gravitational potential in the integral form. Numerical calculation clearly demonstrates the modulation of the gravitational potential by acoustic oscillations due to the presence of peculiar velocities. We also show that peculiar velocities affect the gravitational potential in the case of the frustrated network of cosmic strings with ω=−1/3.

AB - We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with ω=1/3, we obtain the expression for the gravitational potential in the integral form. Numerical calculation clearly demonstrates the modulation of the gravitational potential by acoustic oscillations due to the presence of peculiar velocities. We also show that peculiar velocities affect the gravitational potential in the case of the frustrated network of cosmic strings with ω=−1/3.

KW - Cosmology

KW - Gravitational potential

KW - Peculiar velocities

KW - Scalar perturbations

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U2 - 10.1016/j.physletb.2020.135761

DO - 10.1016/j.physletb.2020.135761

M3 - Article

AN - SCOPUS:85090400963

SN - 0370-2693

VL - 809

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 135761

ER -

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

Abstract

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Keywords

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