22–26 Aug 2022
Rio de Janeiro
America/Sao_Paulo timezone

$R^2$-gravity quark stars from perturbative QCD

22 Aug 2022, 16:10
20m
Rio de Janeiro

Rio de Janeiro

Vice-Governador Rúbens Berardo street, 100 - Gávea Rio de Janeiro - 22451-070
Plenary/Parallel talk Modified gravity & dark energy Parallel Session Lecture Room

Speaker

Sergio Jorás

Description

We investigate the structure of quark stars in the framework of $f(R)=R+\alpha R^2$ gravity using an equation of state for cold quark matter obtained from perturbative QCD, parametrized only by the renormalization scale. We show that a considerably large range of the free parameter $\alpha$, within and even beyond the constraints previously reported in the literature, yield non-negligible modifications in the mass and radius of stars with large central mass densities. Besides, their stability against baryon evaporation is analyzed through the behavior of the associated total binding energies for which we show that these energies are slightly affected by the modified gravity term in the regime of high proper (baryon) masses

Primary authors

José Jiménez Dr Juan Pretel (CBPF) Eduardo Fraga (Instituto de Física, UFRJ) Sergio Jorás Prof. Reis Ribamar (IF-UFRJ)

Presentation materials