A Cosmological Model with a Negative Constant Deceleration Parameter in Scale-Covariant Theory of Gravitation

2007 ◽  
Vol 307 (4) ◽  
pp. 365-367 ◽  
Author(s):  
D. R. K. Reddy ◽  
R. L. Naidu ◽  
K. S. Adhav
Keyword(s):  
Cosmological Model ◽  
Deceleration Parameter ◽  
Covariant Theory ◽  
Constant Deceleration Parameter ◽  
Scale Covariant Theory ◽  
Negative Constant ◽  
Negative Constant Deceleration Parameter ◽  
Theory Of Gravitation

Anisotropic Bianchi type-II modified holographic Ricci dark energy model in scale-covariant theory of gravitation

2021 ◽  
Author(s):  
Shri Ram ◽  
S. Chandel ◽  
M.K. Verma
Keyword(s):  
Dark Energy ◽  
Bianchi Type ◽  
Covariant Theory ◽  
Type Ii ◽  
Field Equations ◽  
Ricci Dark Energy ◽  
Scale Covariant Theory ◽  
Cosmological Observations ◽  
Negative Constant ◽  
Theory Of Gravitation

In this paper, we obtain an anisotropic Bianchi type-II space-time with dark matter and the modified holographic Ricci dark energy in the scale-covariant theory of gravitation. Exact solutions of the field equations are obtained by assuming (I) a negative constant value of the deceleration parameter (II) the component σ<sup>1</sup><sub>1</sub> of the shear tensor σ<sup>j</sup><sub>i</sub> is proportional to the mean Hubble parameter and (III) the gauge function Φ is proportional to a power function of the average scale factor. We have also discussed some important physical aspects of the model which is in agreement with the modern cosmological observations.

Sign in / Sign up

Export Citation Format

Share Document