Dark energy and the accelerated expansion of the Universe

AUTOR(ES)

Waga, Ioav

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2000-06

RESUMO

Recent observations indicate that the expansion of the Universe is accelerating. This suggests the existence of some kind of exotic matter with negative pressure. The simplest possibility is a cosmological constant but there are alternatives, as for instance an evolving scalar field. In this paper we explore constraints from lensing statistics and high-z type Ia Supernovae on some of these alternatives.

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