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Pregled bibliografske jedinice broj: 157952

Časopis

Autori: Štefančić, Hrvoje
Naslov: Phantom appearance of non-phantom matter
Izvornik: European physical journal C : particles and fields (1434-6044) 36 (2004); 523
Vrsta rada: članak
Ključne riječi: phantom matter; cosmology
Sažetak:
Two cosmological models with non-phantom matter having the same expansion of the universe as phantom cosmologies are constructed. The first model is characterized by the evolving gravitational "constant" $G$ and a dark energy component with a non-conserved energy-momentum tensor. The second model includes two interacting components, the dark energy component and the matter component. Closed form solutions are obtained for the constant values of model parameters and constraints on the parameters of each model from cosmological observations are outlined. For both models it is explicitly shown how the components of each model produce the expansion of the universe characteristic of phantom cosmologies, despite the absence of phantom energy. These findings stress the interpretation of phantom energy as an effective description of the more complex dynamics of non-phantom matter.
Projekt / tema: 0098002
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://http://xxx.lanl.gov/abs/astro-ph/0312484
URL cjelovitog teksta:
Google Scholar: Phantom appearance of non-phantom matter



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