The Last Three Seconds: Packed Message delivered by Tides in Binary Neutron Star Mergers

Understand

It is known that the leading-order tidal effects in gravitational waveforms can be quantified by tidal deformability, while higher order terms, e.g., harmonic overtones of Love number and dynamical tides, have not been well-investigated yet.

• The concept of a ``form factor'', which is different from while resembles the effective tidal deformability, for the tidal interactions between neutron stars in coalescing binaries is illustrated here.
• The form factor effectively incorporates the contribution of dynamical tides.
• The dependence of tidal form factor on tidal deformability, spins, and inclination angles is modeled and expressed in a closed form.