Spatially Hyperbolic Gravitating Sources in $\Lambda$-Dominated Era

TL;DR

This paper investigates how the cosmological constant influences hyperbolically symmetric matter configurations, revealing effects like negative energy density and Minkowskian cores, and presents three new solution families in a $ ext{Lambda}$-dominated universe.

Contribution

It extends previous work by analyzing Einstein-$ ext{Lambda}$ equations for hyperbolic fluids, introducing new solutions with zero Weyl scalar, zero complexity, and stiff fluid configurations.

Findings

Negative energy density observed in solutions

Formation of Minkowskian core near symmetry axis

Three distinct solution families identified

Abstract

This study focuses on the impact of the cosmological constant on hyperbolically symmetric matter configurations in static background. We extend the work of Herrera \cite{herrera2021hyperbolically} and describe the influences of such repulsive character on a few realistic features of hyperbolical anisotropic fluids. After describing Einstein-$\Lambda$ equations of motion, we elaborated the corresponding mass function along with its conservation laws. In our study, besides observing negative energy density, we notice the formation of Minkowskian core as matter content is compelled itself not to follow inward motion near the axis of symmetry. Three families of solution are found in $\Lambda$-dominated epoch. First is calculated by keeping zero value to Weyl scalar, while the second solution maintains zero complexity in the subsequent changes of the hyperbolical compact object. However, the last model encompasses stiff fluid within the self-gravitating system. Such type of theoretical setup suggests its direct link to study a few particular quantum scenarios where negative behavior of energy density is noticed at $\Lambda$ dominated regime.