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

被引：2
|
作者：
Burgazli, Alvina [1 ]
Shulga, Valerii [2 ,3 ]
Yukselci, A. Emrah [4 ]
Zhuk, Alexander [1 ]
机构：
[1] Odesa Natl Univ, Astron Observ, Dvoryanskaya St 2, UA-65082 Odesa, Ukraine
[2] Jilin Univ, Int Ctr Future Sci, 2699 Qianjin St, Changchun 130012, Peoples R China
[3] Natl Acad Sci Ukraine, Inst Radio Astron, 4 Mystetstv Str, UA-61002 Kharkiv, Ukraine
[4] Istanbul Tech Univ, Dept Phys, TR-34469 Istanbul, Turkey
来源：
PHYSICS LETTERS B | 2020年 / 809卷
关键词：
Cosmology; Scalar perturbations; Peculiar velocities; Gravitational potential;
D O I：
10.1016/j.physletb.2020.135761
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider a universe filled with perfect fluid with the constant equation of state parameter omega. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential. For radiation with omega = 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 omega = -1/3. (C) 2020 The Author(s). Published by Elsevier B.V.
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页数：6
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