Springer Berlin Heidelberg
Berlin/Heidelberg
Springer
10052
10.1007/10052.1434-6052
1434-6044
1434-6052
30312819
The European Physical Journal C
Particles and Fields
Eur. Phys. J. C
Physics
Elementary Particles, Quantum Field Theory
Nuclear Physics, Heavy Ions, Hadrons
Quantum Field Theories, String Theory
Measurement Science and Instrumentation
Astronomy, Astrophysics and Cosmology
Nuclear Energy
Physics and Astronomy
79
79
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87
2019
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23
2019
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2019
EDP Sciences, Societa Italiana di Fisica (SIF) and Springer-Verlag GmbH, DE
2019
7147
10.1140/epjc/s10052-019-7147-z
659
22
Study of QCD generalized ghost dark energy in FRW universe
02
Physical Sciences
0201
Astronomical and Space Sciences
Regular Article - Theoretical Physics
1
9
2019
7
19
2019
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2019
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17
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The Author(s)
2019
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Funded by SCOAP3
Mahasweta
Biswas
mahasweta.rs2014@math.iiests.ac.in
Ujjal
Debnath
ujjaldebnath@gmail.com
Shounak
Ghosh
shounak.rs2015@physics.iiests.ac.in
B.
K.
Guha
bkguhaphys@gmail.com
0000 0001 2189 8604
grid.440667.7
Department of Mathematics
Indian Institute of Engineering Science and Technology, Shibpur
Howrah
West Bengal
711103
India
0000 0001 2189 8604
grid.440667.7
Department of Physics
Indian Institute of Engineering Science and Technology, Shibpur
Howrah
West Bengal
711103
India
Abstract
A phenomenological generalized ghost dark energy model has been studied under the framework of FRW universe. In ghost dark energy model the energy density depends linearly on Hubble parameter (H) but in this dark energy model, the energy density contains a the sub-leading term which is depends on , so the energy density takes the form , where and are the constants. The solutions of the Friedman equation of our model leads to a stable universe. We have fitted our model with the present observational data including Stern data set. With the help of best fit results we find the adiabatic sound speed remains positive throughout the cosmic evolution, that claims the stability of the model. The flipping of the signature of deceleration parameter at the value of scale factor indicates that the universe is at the stage of acceleration i.e. de Sitter phase of the universe at late time. Our model shows that the acceleration of the universe begin at redshift and the model is also consistent with the current observational data.