13–17 sept. 2021
São José dos Campos, Brazil
Fuseau horaire America/Sao_Paulo

Neutron stars in f(R, T) gravity using realistic equations of state in the light of massive pulsars and GW170817

13 sept. 2021, 16:04
1m
São José dos Campos, Brazil

São José dos Campos, Brazil

Instituto Tecnológico de Aeronáutica
Poster Poster

Orateur

Prof. Manuel Malheiro (Instituto Tecnológico de Aeronáutica )

Description

In this work, we investigate neutron stars (NS) in $f(\mathcal{R,T})$ gravity for the case $R+2\lambda\mathcal{T}$, $\mathcal{R}$ is the Ricci scalar and $\mathcal{T}$ the trace of the energy-momentum tensor. The hydrostatic equilibrium equations are solved considering realistic equations of state (EsoS). The NS masses and radii obtained are subject to a joint constrain from massive pulsars and the event GW170817. We found that the increment in the star mass is less than $1\%$, much smaller than previous ones obtained not considering the realistic stellar structure. The finding that using several relativistic and non-relativistic models the variation on the NS mass is almost the same for all the EsoS, manifests that our results are insensitive to the high density part of the EsoS. We highlight that our results indicate that conclusions obtained from NS studies done in modified theories of gravity without using realistic EsoS that describe correctly the NS interior can be unreliable.

Auteurs principaux

Ronaldo Lobato (Texas A&M University - Commerce) Odilon Lourenço (Instituto Tecnológico de Aeronáutica) Pedro Moraes (USP) César Lenzi (ITA) Marcio Avellar (UNIFESP) Wayne de Paula (Instituto Tecnologico de Aeronautica) Mariana Dutra (Instituto Tecnológico de Aeronáutica) Prof. Manuel Malheiro (Instituto Tecnológico de Aeronáutica )

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