Gravitational decoupling and superfluid stars

TL;DR

This paper applies gravitational decoupling to model superfluid stars within covariant scalar gravity on fluid branes, revealing how brane tension and decoupling parameters influence star properties and align with observational data.

Contribution

It introduces a novel application of gravitational decoupling to superfluid stars in scalar gravity, incorporating brane tension effects for more realistic models.

Findings

Finite brane tension improves mass function estimates.

Decoupling parameter affects physical features of superfluid stars.

Model corrections align with current observational data.

Abstract

The gravitational decoupling is applied to studying minimal geometric deformed (MGD) compact superfluid stars, in covariant logarithmic scalar gravity on fluid branes. The brane finite tension is shown to provide more realistic values for the asymptotic value of the mass function of MGD superfluid stars, besides constraining the range of the self-interacting scalar field, minimally coupled to gravity. Several other physical features of MGD superfluid stars, regulated by the finite brane tension and a decoupling parameter, are derived and discussed, with important corrections to the general-relativistic limit that corroborate to current observational data.