Hollow sphere, a flexible multimode Gravitational Wave antenna

TL;DR

This paper explores the potential of hollow spherical gravitational wave detectors, highlighting their flexibility and comparable capabilities to solid spheres, with potential for significant astrophysical insights.

Contribution

It introduces the hollow sphere as a versatile alternative to solid spheres for gravitational wave detection, emphasizing adjustable parameters and potential advantages.

Findings

Hollow spheres have similar theoretical detection capabilities as solid spheres.

Adjustable thickness allows tailoring the detector to specific frequency ranges.

Potential for significant astrophysical information extraction.

Abstract

Hollow spheres have the same theoretical capabilities as the usual solid ones, since they share identical symmetries. The hollow sphere is however more flexible, as thickness is an additional parameter one can vary to approach given specifications. I will briefly discuss the more relevant properties of the hollow sphere as a GW detector (frequencies, cross sections), and suggest some scenarios where it can generate significant astrophysical information.