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General Relativity and Quantum Cosmology, gr-qc
Abstract:
Compact binaries are the most promising source for the advanced gravitational
wave detectors, which will start operating this year. The influence of spin on
the binary evolution is an important consequence of general relativity and can
be large. It is argued that the spin supplementary condition, which is related
to the observer dependence of the center, gives rise to a gauge symmetry in the
action principle of spinning point-particles. These spinning point-particles
serve as an analytic model for extended bodies. The internal structure can be
modelled by augmenting the point-particle with higher-order multipole moments.
Consequences of the recently discovered universal (equation of state
independent) relations between the multipole moments of neutron stars are
discussed.
