Transient cosmic acceleration

Details Transient cosmic acceleration Transient cosmic acceleration

2009-11-05

arxiv.org/abs/0911.1087v1

Memorie della Societ\`a Astronomica Italiana, v. 80, p. 933-938, 2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 3 figures, IAU 2009 JD9 conference proceedings. MmSAIt, vol.80 (in press). Eds. Paolo Molaro & Elisabeth Vangioni

Scientific paper

We explore cosmological consequences of two quintessence models in which the current cosmic acceleration is a transient phenomenon. We argue that one of them (in which the EoS parameter switches from freezing to thawing regimes) may reconcile the slight preference of observational data for freezing potentials with the impossibility of defining observables in String/M-theory due to the existence of a cosmological event horizon in asymptotically de Sitter universes.

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