Impact of Buchdahl metric potential on thin-shell gravastar framework in de Rham–Gabadadze–Tolley-like massive gravity

This paper presents a study on gravitational vacuum stars (gravastars) with an isotropic matter distribution in de Rham–Gabadadze–Tolley (dRGT) massive gravity incorporating Buchdahl metric function. Here we have conducted an analysis on thin-shell singularity-free gravastar configuration. The study demonstrates the viability of gravastars as alternatives to black holes (BHs) in this massive gravity. Our research yields singularity-free analytical solutions for gravastar interior and without event horizon. Our discussion focuses on the properties of the thin shell of ultra-relativistic stiff fluid viz., length, energy, entropy and the massive gravity’s impact on these physical properties. The junction conditions have been carefully examined and the study of surface redshift analysis implies regularity of the model. Our paper also includes energy condition analysis supporting the thin shell formation. Thus our solutions eliminate singularities and information paradoxes and the implications of these solutions are seemingly noteworthy and exhibit physical desirable properties.