Tidal forces and mode resonances in compact binaries

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Event date
GAP room
Jan Steinhoff (IST)

Abstract: Tidal interaction plays an important role in the inspiral of compact binaries involving neutron stars. In an adiabatic (vanishing frequency) approximation these are encode in the Love constants, which depend on the internal structure of the star. For neutron stars a general relativistic definition of the Love numbers is necessary and was only found in recent years by Hinderer, Damour&Nagar, and Poisson. In the present talk an extension to nonvanishing frequencies is discussed. The frequency-dependent Love number is in fact a propagator for an effective field theory description of a compact object. The poles of thispropagator give rise to resonances of tidal forces and oscillation modes of the star.

Jan Steinhoff (IST)

Slides; Online seminar