Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17005g&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The main parameters describing the gravitational-wave chirp signal from the inspiral of a large mass ratio, unequal-mass binary can be expressed in terms of the moments of the more massive object. These moments have already been computed for black holes and various neutron-star models in general relativity (GR). In GR, the higher moments of a rotating black hole (described by the Kerr metric) are fixed by the mass and the angular momentum. As pointed out by Ryan (Phys. Rev. D 52, 5707, 1995), this allows one to test whether a collapsed object is a black hole or not, and thus test one of the predictions of GR. In the planned gravitational wave satellite experiment LISA, it is anticipated that the first three moments may be measured with sufficient precision to test GR. We report calculations of the corresponding moments for rotating compact or collapsed objects in alternate theories of gravity.
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