Dissipative Tidal Effects to Next-to-leading Order in Spinning Binaries

Tidal interactions in compact binaries affect the gravitational waves emitted during the late inspiral. In this talk, I will discuss how the spin of compact objects affects their tidal dynamics during their late inspiral in the post-Newtonian formalism. In particular, spin-aligned, quasi-circular inspirals acquire a 2.5PN correction to the gravitational-wave phase from spin-induced tidal dissipation, featuring a logarithmic frequency dependence that breaks degeneracies with the phase of coalescence. Although small for typical neutron star binaries, this effect becomes relevant for rapidly spinning binary black holes. For a GW150914-type binary, we estimate that the dephasing induced by the spin-tidal coupling may be measurable with current detector sensitivities, offering a new handle on subtle spin-tidal interactions and potential systematic biases in waveform modeling.