Massless and massive scalar shell dynamics from rotating BTZ black holes with nonminimally coupled scalar fields.

Abstract

This paper is devoted to presenting the dynamics of thin-shell composed of massive and massless scalar fields developed from (2+1)-dimensional rotating black holes with nonminimally coupled scalar fields. Furthermore, this structure opens up the possibility of investigating links between thin-shell dynamics and black hole physics. It is found that the nonminimally coupled scalar field affects the dynamics of the shell in the background of massive and massless scalar fields. For higher values of the non-minimally coupled scalar field, the effective potential for the choice of massless scalar field decreases as the shell radius increases, which yields the expansion of the shell. For a massive scalar field, the developed structure expresses both expansion and collapsing nature for different choices of physical parameters. Overall, the nonminimal coupling of a scalar field with a 2+1-dimensional revolving black hole affects the dynamical configurations of thin-shell. Results indicate that scalar hair critically influences shell dynamics, leading to distinct behaviors: massless scalar fields promote monotonic expansion, while massive scalar fields induce collapse. The findings highlight that the effective potential's characteristics dictate the shell's dynamic behavior, revealing that an increase in scalar field parameters enhances expansion rates, whereas integration constants exhibit an inverse relationship.