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Original scientific paper

Nonsingular cosmological models with a variable cosmological term Λ

Anirudh Pradhan ; Department of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India
Kashika Srivastava ; Department of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India
Amrit Lal Ahuja ; Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Pune-411 007, India


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Abstract

Ponovno razmatramo egzaktna rješenja Einsteinovih jednadžbi polja za sferno simetrični kozmološki model bez velikog praska i drugih singulariteta, koji su nedavno razvili Dadhich i Patel (2000). Sadržaj tvari u modelu je perfektna tekućina bez posmika s izotropnim tlakom i radijalnim tokom topline. Izveli smo tri egzaktna rješenja za perfektnu tekućinu i tekućinu s volumnom viskoznošću. Dobivamo kozmološki član Λ(t) koji opada s vremenom, što je u skladu s novim opažanjima supernova tipa Ia.

Keywords

Hrčak ID:

304467

URI

https://hrcak.srce.hr/304467

Publication date:

1.7.2007.

Article data in other languages: english

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