Accelerated Expansion of the Universe in the Model with Nonuniform Pressure

@article{36721,
   author = {Koptěva, Olena and Bormotova, Iryna and Churilova, Maria and Stuchlík, Zdeněk},
   article_number = {1},
   doi = {http://dx.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://dx.doi.org/10.3847/1538-4357/ab4f7f.