Spin and energy evolution equations for a wide class of extended bodies

Abstract

We give a surface integral derivation of the leading-order evolution equations for the spin and energy of a relativistic body interacting with other bodies in the post-Newtonian expansion scheme. The bodies can be arbitrarily shaped and can be strongly self-gravitating. The effects of all mass and current multipoles are taken into account. As part of the computation one of the 2PN potentials parametrizing the metric is obtained. The formulae obtained here for spin and energy evolution coincide with those obtained by Damour, Soffel and Xu for the case of weakly self-gravitating bodies. By combining an Einstein-Infeld-Hoffman-type surface integral approach with multipolar expansions we extend the domain of validity of these evolution equations to a wide class of strongly self-gravitating bodies. This paper completes in a self-contained way a previous work by Racine and Flanagan on translational equations of motion for compact objects.

17 pages, no figure; substantial changes to presentation, cleaner computational method and a reference added; version published in Class. Quantum Grav

References in corpus (1)

• Post-1-Newtonian equations of motion for systems of arbitrarily structured bodies

Cited by in corpus (6)

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• Gravitomagnetic tidal effects in gravitational waves from neutron star binaries
• Covariant Equations of Motion of Extended Bodies with Arbitrary Mass and Spin Multipoles
• Post-Newtonian Lagrangian of an N-body System with Arbitrary Mass and Spin Multipoles
• Covariant Equations of Motion Beyond the Spin-Dipole Particle Approximation