Formação de estrutura em larga escala em regime não linear
Nenhuma Miniatura disponível
Arquivos
Data
2012-08-17
Autores
Justo, Igor Figueiredo
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
The use of long range optical instruments shows the existence of an amazing structure constituted of empty regions interspersed with galaxies, clusters and superclusters of galaxies. The formation process of this large scale structure is an important tool for testing many existing cosmological models. In general one applies the perturbative method to study this formation, considering an expansion of the matter density in terms of small fluctuations. The part of the evolution period in which we can consider only linear terms of the expansion is known as the linear evolution regime. Due to gravitational instability, the small fluctuations become stronger, until the linear approximation turns impracticable. Then we can say that the evolution is in a non linear regime. In the present work we make a detailed revision of the principal analytical method developed to the study of the non linear evolution of matter density fluctuations, obtaining the principal outcomes and exposing them in an intuitive and gradual manner such that even an unfamiliar reader in the subject will be able to understand
Descrição
Palavras-chave
Citação
JUSTO, Igor Figueiredo. Formação de estrutura em larga escala em regime não linear. Orientador: Sergio Vitorino de Borba Gonçalves. 2012. 113 f. Dissertação (Mestrado em Física) – Programa de Pós-Graduação em Física, Universidade Federal do Espírito Santo, Centro de Ciências Exatas e da Terra, 2012.