Banca de DEFESA: LUÍS FELIPE MARTINS DE ALMEIDA MORENA REIS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUÍS FELIPE MARTINS DE ALMEIDA MORENA REIS
DATE: 23/09/2021
TIME: 14:00
LOCAL: Plataforma Google Meet
TITLE:

Emission of Gravitational Waves in Quadratic Theories of Gravity

KEY WORDS:

gravitational waves, modified gravity, quadratic gravity, circular orbits.

PAGES: 136
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Despite the unquestionable success of General Relativity (GR) in being able to describe and predict several gravitational
phenomena, this theory still has some internal issues of interest for cosmology and high energy physics, e.g. singularities, dark
energy, cosmology of the early universe, quantum gravity, etc. Extended theories of gravity, which consist of modifications in
GR, have been shown to be a possible solution to these problems. Therefore, in this work we will study a quadratic theory of
gravity, where the terms 𝛼𝑅 2 and 𝛾𝑅 𝜈𝜉 𝑅 𝜈𝜉 are added to the Einstein-Hilbert action with 𝛼 and 𝛾 being dimensionless coupling
constants. This theory is usually present\ in several works being linked to the renormalization issues of gravity. In this work we
will study the main aspects of this quadratic theory, focusing mainly on the properties of new fields that manifest themselves in
the theory through the solution of linearized field equations. Thus, we will analyze the role that these fields play in the orbital
evolution of a point mass system in a circular orbit due to
the emission of gravitational waves.

BANKING MEMBERS:
Presidente - 1674079 - LEO GOUVEA MEDEIROS
Interno - 236.141.018-43 - RICCARDO STURANI - UFRN
Externo à Instituição - RODRIGO ROCHA CUZINATTO - UNIFAL-MG