Starts 25 Nov 2025 16:00
Ends 25 Nov 2025 17:00
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HECAP Seminar - Nonlinear Love Numbers of Black Holes and Neutron Stars
Hybrid
Leonardo Building - Lagrange Lecture Hall and via Zoom
Please note unusual venue
Abstract:
Love numbers quantify how compact objects deform under external tidal fields. They are key gravitational wave observables and provide a direct probe of compact-object structure. At linear order, black hole (BH) Love numbers vanish - a consequence of the hidden symmetries of linear BH perturbations. I will show that this BH property persists beyond the linear regime.
For neutron stars, Love numbers are sensitive to the equation of state. Motivated by upcoming detectors. I will present calculations of nonlinear neutron-star Love numbers by matching relativistic stellar perturbations to the worldline effective field theory (EFT). Finally, I will discuss resonant couplings between orbital motion and stellar deformations and their incorporation into the worldline EFT.
For neutron stars, Love numbers are sensitive to the equation of state. Motivated by upcoming detectors. I will present calculations of nonlinear neutron-star Love numbers by matching relativistic stellar perturbations to the worldline effective field theory (EFT). Finally, I will discuss resonant couplings between orbital motion and stellar deformations and their incorporation into the worldline EFT.