Anisotropic Cosmology with a Dilaton Field Coupled to Ghost Dark Energy

被引:1
作者
H. Hossienkhani
V. Fayaz
S. A. A. Terohid
N. Azimi
Z. Zarei
M. Ganji
机构
[1] Islamic Azad University,Department of Physics, Hamedan Branch
[2] Islamic Azad University,Department of Mathematics, Hamedan Branch
来源
Theoretical and Mathematical Physics | 2018年 / 194卷
关键词
anisotropic universe; ghost dark energy; generalized ghost dark energy; dilaton scalar field; generalized second law of thermodynamics; perturbation theory;
D O I
暂无
中图分类号
学科分类号
摘要
We study a dilaton scalar field coupled to ghost dark energy in an anisotropic universe. The evolution of dark energy, which dominates the universe, can be completely described by a single dilaton scalar field. This connection allows reconstructing the kinetic energy and also the dynamics of the dilaton scalar field according to the evolution of the energy density. Using the latest observational data, we obtain bounds on the ghost dark energy models and also on generalized dark matter and dark energy. For this, we investigate how the expansion history H(z) is determined by observational quantities. We calculate the evolution of density perturbations in the linear regime for both ghost and generalized ghost dark energy and compare the results with ΛCDM models. We discuss the justification of the generalized second law of thermodynamics in a Bianchi type-I universe. The obtained model is stable for large time intervals but is unstable at small times.
引用
收藏
页码:415 / 438
页数:23
相关论文
共 50 条
[41]   A Universe with a Generalized Ghost Dark Energy and Van der Waals Fluid Interacting with a Fluid [J].
M. Khurshudyan ;
B. Pourhassan .
International Journal of Theoretical Physics, 2015, 54 :3251-3267
[42]   Bianchi type I Universe and interacting ghost scalar fields models of dark energy [J].
Hossienkhani, H. .
ASTROPHYSICS AND SPACE SCIENCE, 2016, 361 (04)
[43]   Bianchi type I Universe and interacting ghost scalar fields models of dark energy [J].
H. Hossienkhani .
Astrophysics and Space Science, 2016, 361
[44]   A Universe with a Generalized Ghost Dark Energy and Van der Waals Fluid Interacting with a Fluid [J].
Khurshudyan, M. ;
Pourhassan, B. .
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2015, 54 (09) :3251-3267
[45]   Cosmological constraints on ghost dark energy in the Brans-Dicke theory by using MCMC approach [J].
Alavirad, Hamzeh ;
Sheykhi, Ahmad .
PHYSICS LETTERS B, 2014, 734 :148-156
[46]   Anisotropic Universe Models with Perfect Fluid and Dark Energy with Time Varying G and Λ [J].
V. Fayaz ;
H. Hossienkhani ;
F. Felegary .
International Journal of Theoretical Physics, 2012, 51 :2656-2664
[47]   Resummed kinetic field theory: a model of coupled baryonic and dark matter [J].
Geiss, Daniel ;
Kostyuk, Ivan ;
Lilow, Robert ;
Bartelmann, Matthias .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2021, (01)
[48]   Anisotropic Universe Models with Perfect Fluid and Dark Energy with Time Varying G and I⟩ [J].
Fayaz, V. ;
Hossienkhani, H. ;
Felegary, F. .
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2012, 51 (08) :2656-2664
[49]   On the various aspects of interacting Ricci dark energy and tachyonic field [J].
Surajit Chattopadhyay .
Astrophysics and Space Science, 2011, 331 :651-655
[50]   On the various aspects of interacting Ricci dark energy and tachyonic field [J].
Chattopadhyay, Surajit .
ASTROPHYSICS AND SPACE SCIENCE, 2011, 331 (02) :651-655