Banca de DEFESA: MARIA APARECIDA DOS SANTOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : MARIA APARECIDA DOS SANTOS
DATA : 31/07/2018
HORA: 10:00
LOCAL: AUDITÓRIO DO DFTE
TÍTULO:

RESTRICTIONS OF INFLATIONARY MODELS β-EXPONENTIAL
USING BACKGROUND COSMIC RADIATION DATA

PALAVRAS-CHAVES:

Scalar Fields, Inflationary Cosmology, Cosmic Background Radiation.

PÁGINAS: 85
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
SUBÁREA: Física da Matéria Condensada
RESUMO:

In recent years, the inflationary scenario has become one of the most important models in the description of the Universe in its early instants. It initially emerges as a solution to the problems of standard cosmology, but has mainly stood out as the mechanism capable of generating the initial perturbations that gave rise to the large-scale structures of the Universe. Their theoretical predictions can be tested with the current observational data, which allow to restrict several classes of inflationary models present in the literature. Thus, in this work we analyze a class of generalized inflationary models proposed by Alcaniz and Carvalho [1], known as β-exponential inflation and we show that this type of potential can arise in the context of brane cosmology, in which the field describing the size-extra dimension is interpreted as the inflaton. We discuss the observational viability of this class of models in the light of the latest Cosmic Radiation Background (RCF) data obtained by the Planck satellite through a Bayesian analysis and impose constraints on the model parameters. We find that the RCF data weakly prefer the standard model ΛCDM in relation to the β-exponential inflation. However, when the current local measurements of the Hubble parameter, H0, are considered, the β-exponential model is moderately preferred in relation to the ΛCDM cosmology, making the study of this class of inflationary models interesting in the current context of H0 voltage.

MEMBROS DA BANCA:
Externo à Instituição - FABIO CABRAL CARVALHO - UERN
Externo à Instituição - JAILSON SOUZA DE ALCANIZ - ON/MCT
Interno - 1674079 - LEO GOUVEA MEDEIROS
Interno - 1672854 - RAIMUNDO SILVA JUNIOR
Externo à Instituição - RODRIGO FERNANDES LIRA DE HOLANDA - UEPB