Banca de DEFESA: JEREMIAS BEZERRA SOBRINHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JEREMIAS BEZERRA SOBRINHO
DATE: 10/07/2025
TIME: 14:00
LOCAL: Google Meet
TITLE:

Radiação Cósmica de Fundo e Condições Iniciais do Universo:
Uma Abordagem Observacional

 

KEY WORDS:

Initial Conditions, Cosmic Microwave Background, Cosmological Parameters

PAGES: 86
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

The cosmic microwave background (CMB) is one of the main tools for understanding the origin,
evolution, and composition of the Universe. This dissertation aims to analyze how different experiments
— especially Planck, ACT, and SPT — contribute to the determination of cosmological parameters, with
an emphasis on those related to the initial conditions of the Universe, such as the scalar amplitude As
and the scalar spectral index ns. We begin by discussing the theoretical foundations of the CMB and the
statistical methods used in its analysis, with a focus on Bayesian inference. We then present a detailed
comparison between the main CMB experiments, considering their instrumental differences, multipole
coverage, and analysis methodologies. We analyze the recent datasets from ACT DR6 and SPT-3G pol,
exploring how different data combinations and multipole cuts affect the parameter estimates.

 

COMMITTEE MEMBERS:
Presidente - 1674079 - LEO GOUVEA MEDEIROS
Interno - 1390849 - RODRIGO FERNANDES LIRA DE HOLANDA
Externo à Instituição - RODRIGO ROCHA CUZINATTO - UNIFAL-MG