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Gauss-Bonnet stars

Grant number: 18/20689-7
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): December 20, 2018
Effective date (End): June 29, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Manuel Máximo Bastos Malheiro de Oliveira
Grantee:Pedro Henrique Ribeiro da Silva Moraes
Supervisor abroad: Mariafelicia de Laurentis
Home Institution: Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil
Local de pesquisa : Università degli Studi di Napoli Frederico II (UNINA), Italy  
Associated to the scholarship:15/08476-0 - Gravitational waves in f(R,T) theories: polarization states and astrophysical sources, BP.PD

Abstract

The macroscopical properties of neutron stars depend on both the equation of state assumed for nuclear matter and the underlying gravitational theory. In this project I propose the construction of the hydrostatic equilibrium equation for neutron stars in the f(R,G) theory, with R being the Ricci scalar and G the Gauss-Bonnet scalar. For the nuclear matter inside neutron stars I will assume the BSk19, BSk20 and BSk21 equations of state. The approach will be further applied to white dwarfs, described by the equation of state for complete ionized atoms embedded in a relativistic Fermi gas of electrons. The main goal of the project is to check if the equilibrium configurations of neutron stars and white dwarfs in this theory of gravity can predict the existence of massive pulsars and super-Chandrasekhar white dwarfs, getting in touch, in this way, with recent observations.