scholarly journals Inhomogeneous Universe Models with Varying Cosmological Term

1998 ◽  
Vol 30 (4) ◽  
pp. 643-651 ◽  
Author(s):  
Luis P. Chimento ◽  
Diego Pavón
2001 ◽  
Vol 10 (03) ◽  
pp. 291-298 ◽  
Author(s):  
ANIRUDH PRADHAN ◽  
AMBARISH KUMAR

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.


2016 ◽  
Vol 12 (3) ◽  
pp. 4350-4355
Author(s):  
VIBHA SRIVASTAVA ◽  
P. N. PANDEY

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.


1996 ◽  
Vol 28 (6) ◽  
pp. 679-689 ◽  
Author(s):  
Vicenç Méndez ◽  
Diego Pavón

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

Universe ◽  
2021 ◽  
Vol 7 (7) ◽  
pp. 205
Author(s):  
Sanjay Mandal ◽  
Avik De ◽  
Tee-How Loo ◽  
Pradyumn Kumar Sahoo

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.


2016 ◽  
Vol 2016 (02) ◽  
pp. 001-001 ◽  
Author(s):  
I. Odderskov ◽  
S.M. Koksbang ◽  
S. Hannestad

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