Nota de FísicaPublicado
Constraints on the generalized Chaplygin gas from supernovae observations
Martín Makler; Sérgio Quinet de Oliveira; I. Waga
2002
Dados da publicação
- Autores
- Martín Makler; Sérgio Quinet de Oliveira; I. Waga
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 2002
- Descrição
- We explore the implications of type Ia supernovae (SNIa) observations on flat cosmological models whose matter content is an exotic fluid with equation of state, $p=-M^{4(\alpha +1)}/\rho^{\alpha}$. In this scenario, a single fluid component may drive the Universe from a nonrelativistic matter dominated phase to an accelerated expansion phase behaving, first, like dark matter and in a more recent epoch as dark energy. We show that these models are consistent with current SNIa data for a rather broad range of parameters. However, future SNIa experiments will place stringent constraints on these models, and could safely rule out the special case of a Chaplygin gas ($\alpha=1$) if the Universe is dominated by a true cosmological constant.
- Ano
- 2002
- Número
- CBPF-NF-036/02
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não