scholarly journals Constraints on a Bianchi type I spacetime extension of the standard ΛCDM model

2019 ◽  
Vol 100 (2) ◽  
Author(s):  
Özgür Akarsu ◽  
Suresh Kumar ◽  
Shivani Sharma ◽  
Luigi Tedesco
Keyword(s):  
Bianchi Type ◽  
Type I ◽  
Bianchi Type I ◽  
Λcdm Model

scholarly journals An Anisotropic Model for the Universe

Symmetry ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 1741
Author(s):  
Morgan Le Delliou ◽  
Maksym Deliyergiyev ◽  
Antonino del Popolo
Keyword(s):  
Bianchi Type ◽  
Back Reaction ◽  
Type I ◽  
Proof Of Concept ◽  
Anisotropic Model ◽  
Hubble Diagram ◽  
Bianchi Type I ◽  
Λcdm Model ◽  
The Universe

Motivated by the back-reaction debate, and some unexplained characteristics of the CMB, we investigate the possibility of some anisotropy in the universe observed around us. To this aim, we build up a novel prediction for the Hubble law for the late universe from a Bianchi type I model, taken as proof of concept, transcribing the departure of such model from a ΛCDM model. We dicussed the redshift measurement in this universe, and finally formalized the Hubble diagram.

Stability of LRS Bianchi type-I cosmological models in f(R, T)-gravity

2019 ◽  
Vol 19 (4) ◽  
pp. 055 ◽  
Author(s):  
Umesh Kumar Sharma ◽  
Rashid Zia ◽  
Anirudh Pradhan ◽  
Aroon Beesham
Keyword(s):  
Bianchi Type ◽  
Cosmological Models ◽  
Type I ◽  
Bianchi Type I

Energy–momentum distributions of Ruban universe in general relativity and teleparallel gravity

2019 ◽  
Vol 34 (03n04) ◽  
pp. 1950011 ◽  
Author(s):  
C. Aktaş
Keyword(s):  
General Relativity ◽  
Bianchi Type ◽  
Teleparallel Gravity ◽  
Type I ◽  
Universe Model ◽  
Zero Energy ◽  
Bianchi Type I ◽  
Momentum Distributions ◽  
Bianchi Type I Universe

In this study, we obtain Einstein, Bergmann–Thomson (BT), Landau–Lifshitz (LL), Møller, Papapetrou (PP) and Tolman energy–momentum (EM) distributions for Ruban universe model in general relativity (GR) and teleparallel gravity (TG). We obtain same results for Einstein, Bergmann–Thomson and Landau–Lifshitz energy–momentum distributions in GR and TG. Also, we get same results for Einstein and Tolman energy–momentum distributions in GR. The Møller energy–momentum results are different in GR and TG. Also, using Ruban universe model, we obtain LRS Bianchi type I solutions and we get zero energy–momentum results for this universe model in GR and TG. These results of LRS Bianchi type I universe model agree with Aygün et al., Taşer et al., Doğru et al., Banerjee–Sen, Tryon and Xulu in different gravitation theories.

Bianchi Type I String Dust Magnetized Cosmological Models in Lyra Geometry

2010 ◽  
Vol 54 (1) ◽  
pp. 197-202 ◽  
Author(s):  
Raj Bali ◽  
Naresh K Chandnani ◽  
Lokesh Kumar Gupta
Keyword(s):  
Bianchi Type ◽  
Lyra Geometry ◽  
Cosmological Models ◽  
Type I ◽  
Bianchi Type I
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