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AIP Conf. Proc. / Volume 861 / Issue 1

Multipole moments as a tool to infer from gravitational waves the geometry around an axisymmetric body

AIP Conf. Proc. -- November 3, 2006 -- Volume 861, pp. 756-761
ALBERT EINSTEIN CENTURY INTERNATIONAL CONFERENCE; doi:10.1063/1.2399654

Issue Date: 3 November 2006

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ABSTRACT

Thomas P. Sotiriou^*, and Theocharis A. Apostolatos^**
^*SISSA-International School of Advanced Studies, via Beirut 2-4, 34014, Trieste, Italy
INFN, Sezione di Trieste, Italy
^**National and Kapodistrian University of Athens, Panepistimiopolis, Zografos GR-15783, Athens, Greece

Abinary system, composed of a compact object orbiting around amassive central body, will emit gravitational waves which will dependon the central body's spacetime geometry. We expect that thegravitational wave observables will somehow "encode" the information about thespacetime structure. On the other hand, it has been knownfor some time that the geometry around an axisymmetric bodycan be described by its (Geroch-Hansen) multipole moments. Therefore onecan speculate that using the multipole moments can prove tobe a helpful tool for extracting this information. We willtry to demonstrate this in this talk, following the proceduredescribed by [F. D. Ryan, Phys. Rev. D 52 5707(1995)] and [T. P. Sotiriou and T. A. Apostolatos, Phys.Rev. D 71 044005 (2005)]. ©2006 American Institute of Physics

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