[0912.0459] Spinning compact binary inspiral: Independent variables and dynamically preserved spin configurations

Authors: László Árpád Gergely

Date: 2 Dec 2009

Abstract: We establish the set of independent variables suitable to monitor the complicated evolution of the spinning compact binary during the inspiral. Our approach is valid up to the second post-Newtonian order, including spin and mass quadrupolar effects, for generic (noncircular, nonspherical) orbits. Then we analyze the conservative spin dynamics in terms of these variables. We prove that the only precessing and spinning black hole or neutron star binary configuration which is preserved by the post-Newtonian evolution with spin-spin and quadrupole-monopole contributions included is the equal mass, equal and identically oriented spin configuration. This analytic result puts severe limitations on what particular configurations can be selected in numerical investigations of compact binary evolutions, even in those including only the last orbits of the inspiral.

abs pdf

Dec 04, 2009

0912.0459 (/preprints)
2009-12-04, 09:25 [edit]

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