Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/33733
Título: | Dynamics of Robertson-Walker spacetimes with diffusion |
Autor(es): | Alho, Artur Calogero, Simone Carmelo Ramos, M. P. Machado Soares, A. J. |
Palavras-chave: | Cosmology Diffusion Scalar field Dynamical systems |
Data: | Mar-2015 |
Editora: | Elsevier 1 |
Revista: | Annals of Physics |
Resumo(s): | We study the dynamics of spatially homogeneous and isotropic spacetimes containing a fluid undergoing microscopic velocity diffusion in a cosmological scalar field. After deriving a few exact solutions of the equations, we continue by analyzing the qualitative behavior of general solutions. To this purpose we recast the equations in the form of a two dimensional dynamical system and perform a global analysis of the flow. Among the admissible behaviors, we find solutions that are asymptotically de-Sitter both in the past and future time directions and which undergo accelerated expansion at all times. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/33733 |
DOI: | 10.1016/j.aop.2015.01.010 |
ISSN: | 0003-4916 |
Versão da editora: | The on-line publication is available at www.sciencedirect.com/science/article/pii/S0003491615000135# |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CMAT - Artigos em revistas com arbitragem / Papers in peer review journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Dyn_RW_SpacTimes_Diffusion_2Jan2015.pdf | Versão dos autores para a publicação. | 392,69 kB | Adobe PDF | Ver/Abrir |