Light propagation and quasinormal modes of a topologically charged Schwarzschild-Klinkhamer wormhole

TL;DR

This paper analyzes light propagation, gravitational lensing, and quasinormal modes of a topologically charged wormhole, revealing how monopole charge influences observable phenomena and potential detectability.

Contribution

It provides a comprehensive theoretical study of light behavior and quasinormal modes in a topologically charged wormhole spacetime, including analytical expressions and observational implications.

Findings

Monopole charge affects gravitational lensing observables.

Analytical expressions for deflection angles in different regimes.

Calculated quasinormal modes and scalar perturbation responses.

Abstract

In this work, we present a theoretical analysis of null geodesics, critical photon orbits, and shadow formation associated with a wormhole generated by a geometric defect. The propagation of light in this spacetime is examined through the deflection angle in both weak- and strong-field regimes. Analytical expansions are derived in each regime and employed to characterize gravitational lensing observables. By varying the global monopole charge, we evaluate its impact on these observables and determine parameter ranges that may be accessible to current or future observational probes. Finally, we calculate the quasinormal modes as well as the time-domain solution for scalar perturbations as well.