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Cosmology with variable parameters and effective equation of state for dark energy (CROSBI ID 128496)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Sola, J. ; Štefančić, Hrvoje Cosmology with variable parameters and effective equation of state for dark energy // Journal of physics. A, mathematical and general, 39 (2006), 6753-6760-x

Podaci o odgovornosti

Sola, J. ; Štefančić, Hrvoje

engleski

Cosmology with variable parameters and effective equation of state for dark energy

A cosmological constant, Lambda, is the most natural candidate to explain the origin of the dark energy (DE) component in the Universe. However, due to experimental evidence that the equation of state (EOS) of the DE could be evolving with time/redshift (including the possibility that it might behave phantom-like near our time) has led theorists to emphasize that there might be a dynamical field (or some suitable combination of them) that could explain the behavior of the DE. While this is of course one possibility, here we show that there is no imperative need to invoke such dynamical fields and that a variable cosmological constant (including perhaps a variable Newton's constant too) may account in a natural way for all these features.

cosmological constant; dark energy

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Podaci o izdanju

39

2006.

6753-6760-x

objavljeno

0305-4470

Povezanost rada

Fizika