Spherical collapse in the presence of dark energy.

Name: Mario Rocha Junior
Type: MSc dissertation
Publication date: 18/04/2017
Advisor:

Namesort descending Role
Oliver Fabio Piattella Advisor *

Examining board:

Namesort descending Role
Hermano Endlich Schneider Velten External Examiner *
Luciano Casarini Internal Examiner *
Oliver Fabio Piattella Advisor *
Valerio Marra Internal Examiner *
Wiliam Santiago Hipolito Ricaldi External Examiner *

Summary: It is a known fact that the Universe goes through of expansion WHERE there is strong evidences that the presence of the so-called dark energy is responsible for accelerating this processe. Fromthis point of view, this work aims to use the spherical collapse theory to study the behaviour of a structure, here know as overdensity immersed in a Friedmann-Robertson-Walker background universe. Considering its density as an ideal fluid whose state equation is p = ωρ we will initially apply the theory in an Einstein-de Sitter Universe and then proceed to the universe model with presence of dark energy WHERE we will analyze the ΛCDM and the wCDM models with specific values for the constant w.

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