What can we learn about GW Physics with an elastic spherical antenna?

Details What can we learn about GW Physics with an elastic spherical antenna? What can we learn about GW Physics with an elastic spherical antenna?

2000-06-29

arxiv.org/abs/gr-qc/0006102v1

Phys.Rev. D52 (1995) 591

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 7 figures, REVTeX, enhanced Appendix B with numerical values and mathematical detail. See also gr-qc/0006055

Scientific paper

10.1103/PhysRevD.52.591

A general formalism is set up to analyse the response of an arbitrary solid elastic body to an arbitrary metric Gravitational Wave perturbation, which fully displays the details of the interaction antenna-wave. The formalism is applied to the spherical detector, whose sensitivity parameters are thereby scrutinised. A multimode transfer function is defined to study the amplitude sensitivity, and absorption cross sections are calculated for a general metric theory of GW physics. Their scaling properties are shown to be independent of the underlying theory, with interesting consequences for future detector design. The GW incidence direction deconvolution problem is also discussed, always within the context of a general metric theory of the gravitational field.

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