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^*

^*Bu çalışma için yazışmadan sorumlu yazar

Fizik Mühendisliği Bölümü

Odessa National University
Jilin University
NASU - Institute of Radio Astronomy

Araştırma çıktısı: Dergi yayını › Makale › Hakem

1 Atıf (Scopus)

Özet

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.

Orijinal dil	İngilizce
Makale numarası	135761
Dergi	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Hacim	809
DOI'lar	https://doi.org/10.1016/j.physletb.2020.135761
Yayın durumu	Yayınlandı - 10 Eki 2020

Bibliyografik not

Publisher Copyright:
© 2020 The Author(s)

Belgeye Erişim

10.1016/j.physletb.2020.135761

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

@article{337c108a79554d0fba880c952e08792d,

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.",

keywords = "Cosmology, Gravitational potential, Peculiar velocities, Scalar perturbations",

author = "Alvina Burgazli and Valerii Shulga and Y{\"u}kselci, \{A. Emrah\} and Alexander Zhuk",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2020.135761",

language = "English",

volume = "809",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

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

UR - https://www.scopus.com/pages/publications/85090400963

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

Özet

Bibliyografik not

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

Alıntı Yap