scholarly journals Inhomogeneous Universe Models with Varying Cosmological Term

1998 ◽  
Vol 30 (4) ◽  
pp. 643-651 ◽  
Author(s):  
Luis P. Chimento ◽  
Diego Pavón
Keyword(s):  
Cosmological Term ◽  
Inhomogeneous Universe ◽  
Inhomogeneous Universe Models ◽  
Universe Models

LRS BIANCHI I COSMOLOGICAL UNIVERSE MODELS WITH VARYING COSMOLOGICAL TERM Λ

2001 ◽  
Vol 10 (03) ◽  
pp. 291-298 ◽  
Author(s):  
ANIRUDH PRADHAN ◽  
AMBARISH KUMAR
Keyword(s):  
Energy Momentum Tensor ◽  
Momentum Tensor ◽  
Matter Content ◽  
Cosmological Term ◽  
Field Equations ◽  
Scale Functions ◽  
Bianchi I ◽  
Cosmic Scale ◽  
Geometrical Features ◽  
Universe Models

Einstein's field equations with cosmological term Λ varying with time are considered in the context of general homogeneous, anisotropic universes in a way which conserves the energy–momentum tensor of matter content. It is shown that the field equations are solvable for any arbitrary cosmic scale functions. Some physical and geometrical features of the models are discussed.

ON A PERFECT FLUID K¨ AHLER SPACETIME

2016 ◽  
Vol 12 (3) ◽  
pp. 4350-4355
Author(s):  
VIBHA SRIVASTAVA ◽  
P. N. PANDEY
Keyword(s):  
Field Equation ◽  
Perfect Fluid ◽  
Sectional Curvature ◽  
Einstein Field Equation ◽  
Cosmological Term ◽  
Conformal Killing ◽  
Killing Vectors ◽  
Projectively Flat ◽  
Conformal Killing Vectors

The object of the present paper is to study a perfect fluid K¨ahlerspacetime. A perfect fluid K¨ahler spacetime satisfying the Einstein field equation with a cosmological term has been studied and the existence of killingand conformal killing vectors have been discussed. Certain results related to sectional curvature for pseudo projectively flat perfect fluid K¨ahler spacetime have been obtained. Dust model for perfect fluid K¨ahler spacetime has also been studied.

Expanding models with a varying cosmological term and bulk stress

1996 ◽  
Vol 28 (6) ◽  
pp. 679-689 ◽  
Author(s):  
Vicenç Méndez ◽  
Diego Pavón
Keyword(s):  
Cosmological Term ◽  
Bulk Stress

scholarly journals Generalized supersymmetric cosmological term in N=1 supergravity

2015 ◽  
Vol 2015 (8) ◽  
Author(s):  
P. K. Concha ◽  
E. K. Rodríguez ◽  
P. Salgado
Keyword(s):  
Cosmological Term

scholarly journals Almost-Pseudo-Ricci Symmetric FRW Universe with a Dynamic Cosmological Term and Equation of State

Universe ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 205
Author(s):  
Sanjay Mandal ◽  
Avik De ◽  
Tee-How Loo ◽  
Pradyumn Kumar Sahoo
Keyword(s):  
Equation Of State ◽  
Cosmological Parameters ◽  
Cosmological Term ◽  
Ricci Scalar ◽  
Energy Conditions ◽  
Late Time ◽  
Frw Universe ◽  
Accelerating Expansion ◽  
Expansion Of The Universe ◽  
The Universe

The objective of the present paper is to investigate an almost-pseudo-Ricci symmetric FRW spacetime with a constant Ricci scalar in a dynamic cosmological term Λ(t) and equation of state (EoS) ω(t) scenario. Several cosmological parameters are calculated in this setting and thoroughly studied, which shows that the model satisfies the late-time accelerating expansion of the universe. We also examine all of the energy conditions to check our model’s self-stability.

scholarly journals The local value ofH0in an inhomogeneous universe

2016 ◽  
Vol 2016 (02) ◽  
pp. 001-001 ◽  
Author(s):  
I. Odderskov ◽  
S.M. Koksbang ◽  
S. Hannestad
Keyword(s):  
Inhomogeneous Universe ◽  
Local Value
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