Testing Theories of Gravity with a Spherical Gravitational Wave Detector

Abstract

We consider the possibility of discriminating different theories of gravity using a recently proposed gravitational wave detector of spherical shape. We argue that the spin content of different theories can be extracted relating the measurements of the excited spheroidal vibrational eigenmodes to the Newman-Penrose parameters. The sphere toroidal modes cannot be excited by any metric GW and can be thus used as a veto.

latex file, 16 pages, 1 figure

References in corpus (3)

• Relic Gravitational Waves from String Cosmology
• What can we learn about GW Physics with an elastic spherical antenna?
• First Quantized Noncritical Relativistic Polyakov String

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