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Doctoral Thesis
DOI
10.11606/T.43.2019.tde-21032019-154839
Document
Author
Full name
Rafael Christ de Castro Lopes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2019
Supervisor
Committee
Abramo, Luis Raul Weber (President)
Lima, Marcos Vinicius Borges Teixeira
Quartin, Miguel Boavista
Rosenfeld, Rogério
Saa, Alberto Vazquez
Title in Portuguese
Estudo do raio de turnaround em teorias f(R)
Keywords in Portuguese
Energia Escura
Gravitação Modificada
Modelo f(R)
Raio de Turnaround
Abstract in Portuguese
Nós investigamos o raio de turnaround, a distância do centro da estrutura cósmica até a casca que está se descolando do fluxo de Hubble em um dado tempo, no contexto do modelo de colapso esférico, tanto em Relatividade Geral e em Gravidade Modificada, em particular no cenário f(R) chamado de modelo de Hu-Sawicki. O próximo passo foi investigar a relação entre este raio e a massa de virial de estruturas cósmicas no contexto do modelo LCDM e no modelo f(R) de gravidade modificada.
Title in English
Study of turnaround radius in f(R) theories
Keywords in English
$f(R)$ Model
Dark Energy
Modified Gravity
Turnaround Radius
Abstract in English
We investigate the turnaround radius, the distance from the center of the cosmic structure to the shell that is detaching from the Hubble flow at a given time, in the context of the spherical collapse model, both in General Relativity and in modified gravity, in particular f(R) scenarios -- namely the Hu-Sawicki model. The next step was to investigate the relationship between that radius and the virial mass of cosmic structures in the context of LCDM model and in an f(R) model of modified gravity.
 
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Publishing Date
2019-03-22
 
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