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

Autor:	Burgazli, Alvina, Shulga, Valerii, Yükselci, A. Emrah, Zhuk, Alexander
Rok vydání:	2020
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Physics Letters B 809 (2020) 135761
Druh dokumentu:	Working Paper
DOI:	10.1016/j.physletb.2020.135761
Popis:	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 $\omega =-1/3$. Comment: 7 pages, 4 figures, references added, matches published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2005.06237 Zobrazit plný text záznamu View this record from Arxiv