MG13 - Talk detail |
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Participant |
Pinto-Neto, Nelson | |||||||
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Institution |
Centro Brasileiro de Pesquisas FÃsicas - Rua das laranjeiras, 83, 1103 - Rio de Janeiro - Rio de Janeiro - Brazil | |||||||
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Session |
CM3 |
Accepted |
Yes |
Order |
6 |
Time |
16:30 - 16:50 | |
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Talk |
Oral abstract |
Title |
Bouncing Models and the Cosmological Constant | |||||
| Co-authors | Rodrigo Maier, Stella Pereira and Beatriz B. Siffert | |||||||
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Abstract |
Most bouncing models contain a contracting phase from a very large and rarefied state, where dark energy might have had an important role as it has today in accelerating our large Universe. In this talk, we will assume the simplest and most appealing candidate for dark energy, the cosmological constant, and evaluate its influence on the evolution of cosmological perturbations during the contracting phase of a bouncing model, which also contains a scalar field satisfying $p=w\epsilon$, $w$ being a constant. An almost scale invariant spectrum of perturbations is obtained for $w\approx 0$, which is the usual result for bouncing models. However, the presence of the cosmological constant induces oscillations and a running towards a tiny red-tilted spectrum for long wavelength perturbations. |
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Session |
CM3 |
Accepted |
Yes |
Order |
1 |
Time |
14:00 - 14:40 | |
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Talk |
Oral abstract |
Title |
Revision talk on bouncing models | |||||
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Abstract |
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