Accelerated Expansion of the Universe in the Model with
Nonuniform Pressure

J 2019

Accelerated Expansion of the Universe in the Model with Nonuniform Pressure

KOPTĚVA, Olena; Iryna BORMOTOVA; Maria CHURILOVA and Zdeněk STUCHLÍK

Basic information

Original name

Accelerated Expansion of the Universe in the Model with Nonuniform Pressure

Authors

KOPTĚVA, Olena (804 Ukraine, guarantor, belonging to the institution); Iryna BORMOTOVA (804 Ukraine, belonging to the institution); Maria CHURILOVA (804 Ukraine, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

Astrophysical Journal, Institute of Physics Publishing, 2019, 0004-637X

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 5.746

RIV identification code

RIV/47813059:19240/19:A0000410

Organization unit

Faculty of Philosophy and Science in Opava

DOI

https://doi.org/10.3847/1538-4357/ab4f7f

UT WoS

000506001500098

EID Scopus

2-s2.0-85077619178

Keywords in English

cosmology; expanding universe; cosmological models; accelerating universe; Einstein field equations

Links

GB14-37086G, research and development project.

Changed: 21/4/2020 10:26, Ing. Petra Skoumalová

Abstract

In the original language

We present the particular case of the Stephani solution for shear-free perfect fluid with uniform energy density and nonuniform pressure. Such models appeared as possible alternative to the consideration of the exotic forms of matter like dark energy that would cause the acceleration of universe expansion. These models are characterized by the spatial curvature, depending on time. We analyze the properties of the cosmological model obtained on the basis of exact solution of the Stephani class, and adapt it to the recent observational data. The spatial geometry of the model is investigated. We show that despite possible singularities, the model can describe the current stage of the universe's evolution.

Cite

KOPTĚVA, Olena; Iryna BORMOTOVA; Maria CHURILOVA and Zdeněk STUCHLÍK. Accelerated Expansion of the Universe in the Model with Nonuniform Pressure. Astrophysical Journal. Institute of Physics Publishing, 2019, vol. 887, No 1, p. "98-1"-"98-9", 9 pp. ISSN 0004-637X. Available from: https://doi.org/10.3847/1538-4357/ab4f7f.

@article{36721,
   author = {Koptěva, Olena and Bormotova, Iryna and Churilova, Maria and Stuchlík, Zdeněk},
   article_number = {1},
   doi = {https://doi.org/10.3847/1538-4357/ab4f7f},
   keywords = {cosmology; expanding universe; cosmological models; accelerating universe; Einstein field equations},
   language = {eng},
   issn = {0004-637X},
   journal = {Astrophysical Journal},
   title = {Accelerated Expansion of the Universe in the Model with Nonuniform Pressure},
   url = {https://iopscience.iop.org/article/10.3847/1538-4357/ab4f7f},
   volume = {887},
   year = {2019}
}

TY  - JOUR
ID  - 36721
AU  - Koptěva, Olena - Bormotova, Iryna - Churilova, Maria - Stuchlík, Zdeněk
PY  - 2019
TI  - Accelerated Expansion of the Universe in the Model with Nonuniform Pressure
JF  - Astrophysical Journal
VL  - 887
IS  - 1
SP  - "98-1"-"98-9"
EP  - "98-1"-"98-9"
PB  - Institute of Physics Publishing
SN  - 0004637X
KW  - cosmology
KW  - expanding universe
KW  - cosmological models
KW  - accelerating universe
KW  - Einstein field equations
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/ab4f7f
L2  - https://iopscience.iop.org/article/10.3847/1538-4357/ab4f7f
N2  - We present the particular case of the Stephani solution for shear-free perfect fluid with uniform energy density and nonuniform pressure. Such models appeared as possible alternative to the consideration of the exotic forms of matter like dark energy that would cause the acceleration of universe expansion. These models are characterized by the spatial curvature, depending on time. We analyze the properties of the cosmological model obtained on the basis of exact solution of the Stephani class, and adapt it to the recent observational data. The spatial geometry of the model is investigated. We show that despite possible singularities, the model can describe the current stage of the universe's evolution.
ER  -

KOPTĚVA, Olena; Iryna BORMOTOVA; Maria CHURILOVA and Zdeněk STUCHLÍK. Accelerated Expansion of the Universe in the Model with Nonuniform Pressure. \textit{Astrophysical Journal}. Institute of Physics Publishing, 2019, vol.~887, No~1, p.~''98-1''-''98-9'', 9 pp. ISSN~0004-637X. Available from: https://doi.org/10.3847/1538-4357/ab4f7f.

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