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Preprint Oct 2026

Cubic Quasinormal Modes in the Black-Hole Ringdown

We formulate and numerically solve the nonlinear Teukolsky equations through third order, obtaining a first-principles calculation of cubic quasinormal-mode amplitudes for Kerr black holes. Our approach combines lower-order metric reconstruction in split light-cone gauges with a hyperboloidal, compactified formulation...

Neev Khera, Huan Yang · 2 citations
Preprint Oct 2026

Modeling extreme mass-ratio inspirals in astrophysical and dark-matter environments

Extreme mass-ratio inspirals offer a powerful probe of massive black holes and their environments, but interpreting their signals requires accurate models of orbital dynamics and radiation. Here we bring together advances in black-hole perturbation theory to establish a unified relativistic framework for adiabatic insp...

Dong-Jun Li, Hao-Jui Kuan, Colin Weller et al. · 3 citations
Preprint Oct 2026

Tidal Excitation of Relativistic Stars

How a relativistic star responds to a time-dependent tide has lacked a first-principles counterpart of the Newtonian normal-mode expansion. In general relativity, the tidal field is gauge sensitive, radiative modes are non-Hermitian and incomplete, and the direct and late-time responses are intrinsically nonmodal. In t...

Zhi-Qiang Miao, Jun-Quan Su, Neev Khera et al. · 0 citations

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