Banca de DEFESA: HUMBERTO SCALCO GIMENES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : HUMBERTO SCALCO GIMENES
DATA : 27/12/2017
HORA: 10:00
LOCAL: Auditório do DFTE
TÍTULO:

LambdaCDM Model with dissipative nonextensive dark matter

PALAVRAS-CHAVES:

Viscous Cosmology, nonextensivity, NexDC Correspondence

PÁGINAS: 82
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
SUBÁREA: Física Geral
RESUMO:

Many models in cosmology typically assume the standard bulk viscosity. On this thesis, we study an alternative interpretation for the origin of the bulk viscosity. Using nonadditive statistics proposed by Tsallis, we propose a bulk viscosity component that can only exist by a nonextensive effect through the nonextensive/dissipative correspondence (NexDC). We consider the LambdaCDM model for a flat universe with a dissipative nonextensive viscous dark matter component, following the Eckart theory of bulk viscosity, without any perturbative approach. In order to analyse cosmological constraints, we use one of the most recent observations of Type Ia Supernova, baryon acoustic oscillations and cosmic microwave background data. It's shown that only exists viscous effect in 2 sigma confidence level scenarios.

MEMBROS DA BANCA:
Externo à Instituição - FABIO CABRAL CARVALHO - UERN
Interno - 2492756 - JOAO MEDEIROS DE ARAUJO
Interno - 1294916 - MADRAS VISWANATHAN GANDHI MOHAN
Interno - 2887830 - MATTHIEU SEBASTIEN CASTRO
Externo à Instituição - Maria Aldinez Dantas - UERN
Presidente - 1672854 - RAIMUNDO SILVA JUNIOR