Radial oscillations and stability of compact stars in f(R, T) = R+ 2β T gravity

Juan M.Z. Pretel, Sergio E. Jorás, Ribamar R.R. Reis, José D.V. Arbañil

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We examine the static structure configurations and radial stability of compact stars within the context of f(R, T) gravity, with R and T standing for the Ricci scalar and trace of the energy-momentum tensor, respectively. Considering the f(R, T)=R+2β T functional form, with β being a constant, we derive the corresponding hydrostatic equilibrium equation and the modified Chandrasekhar's pulsation equation. The mass-radius relations and radial mode frequencies are obtained for some realistic equations of state. Our results show that the traditional stellar stability criteria, namely, the necessary condition d M/dρc >0 and sufficient condition ω2 >0, still hold in this theory of gravity.

Original languageEnglish
Article number064
JournalJournal of Cosmology and Astroparticle Physics
Issue number4
StatePublished - Apr 2021

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  • modified gravity
  • neutron stars


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