93 citations · 131 across the 15 of their papers we have counts for
17 papers · 1 filter
Curvature Reconstruction and Tensor Polarizations in Isospectrality-Breaking Black-Hole Perturbations
Pratik Wagle, Dongjun Li, Yanbei Chen +1
Testing general relativity with the ringdown phase of gravitational waves requires connecting modifications of black-hole perturbation dynamics to observable signatures in detector…
Modeling extreme mass-ratio inspirals in astrophysical and dark-matter environments
Dongjun Li, Hao-Jui Kuan, Colin Weller +7
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 r…
From the Test-Mass Limit to Binary Black-Hole Waveforms in Higher-Derivative Gravity
Chaoyi Yang, Neev Khera, Dongjun Li +1
Many higher-derivative theories predict stronger deviations from General Relativity for lower-mass black holes, while their nonlinear field equations often prevent reliable simulat…
Chiral symmetry and black hole isospectrality
Colin Weller, Dongjun Li, Pratik Wagle +3
We prove that black-hole isospectrality between linearly independent solutions follows whenever radiative metric and matter perturbations are reconstructed from complex master vari…
Modified Teukolsky Formalism for Extreme Mass-Ratio Inspirals in Higher-Derivative Gravity
Chaoyi Yang, Neev Khera, Dongjun Li +1
In this work, we study a model problem involving a point particle spiraling into a non-rotating black hole in higher-derivative theories of gravity. In such theories, both the back…
Metric Reconstruction for Generic Black-Hole Perturbations
Dongjun Li, Nicolás Yunes
Standard (radiation-gauge) metric reconstruction excludes generic sources because it requires a tracefree metric perturbation. We remove this obstruction for perturbations of Petro…
Modified Teukolsky formalism: Null testing and numerical benchmarking
Fawzi Aly, Mahmoud A. Mansour, Luis Lehner +3
Next-generation gravitational-wave detectors will make black-hole ringdown an increasingly sensitive probe of small departures from General Relativity in the strong-field regime. T…
Evolving extreme mass-ratio inspirals in a perturbed Schwarzschild spacetime
Michael LaHaye, Colin Weller, Dongjun Li +3
In this work, we develop the modified Teukolsky formalism that describes the GW radiation from a point mass orbiting around a perturbed Schwarzschild BH. This perturbation of the b…
Extreme mass-ratio inspiral within an ultralight scalar cloud I. Scalar radiation
Dongjun Li, Colin Weller, Patrick Bourg +3
In this work, we study the dynamics of an extreme mass-ratio inspiral (EMRI) embedded within a scalar cloud populated around the massive black hole. This cloud may be generated thr…
The ringdown of a black hole surrounded by a thin shell of matter
Andrew Laeuger, Colin Weller, Dongjun Li +1
Recent studies have shown that far-field perturbations to the curvature potential of a black hole spacetime may destabilize its quasinormal mode (QNM) spectrum while only mildly af…
Perturbations of spinning black holes in dynamical Chern-Simons gravity: Slow rotation quasinormal modes
Dongjun Li, Pratik Wagle, Yanbei Chen +1
Gravitational waves offer new ways to test general relativity (GR) in the strong-field regime, including tests involving the ringdown phase of binary black hole mergers, characteri…
Spectroscopy of bumpy BHs: non-rotating case
Colin Weller, Dongjun Li, Yanbei Chen
Recent detections of gravitational waves have made black hole quasinormal modes a powerful tool in testing predictions of general relativity. Understanding the spectrum of these qu…
Perturbations of spinning black holes in dynamical Chern-Simons gravity I. Slow rotation equations
Pratik Wagle, Dongjun Li, Yanbei Chen +1
The detection of gravitational waves resulting by the LIGO-Virgo-Kagra collaboration has inaugurated a new era in gravitational physics, providing an opportunity to test general re…
Isospectrality breaking in the Teukolsky formalism
Dongjun Li, Asad Hussain, Pratik Wagle +3
General relativity, though the most successful theory of gravity, has been continuously modified to resolve its incompatibility with quantum mechanics and explain the origin of dar…
Quantum Gravity Background in Next-Generation Gravitational Wave Detectors
Mathew W. Bub, Yanbei Chen, Yufeng Du +3
We study the effects of geontropic vacuum fluctuations in quantum gravity on next-generation terrestrial gravitational wave detectors. If the VZ effect proposed in Ref. [1], as mod…
Interferometer Response to Geontropic Fluctuations
Dongjun Li, Vincent S. H. Lee, Yanbei Chen +1
We model vacuum fluctuations in quantum gravity with a scalar field, characterized by a high occupation number, coupled to the metric. The occupation number of the scalar is given…
Perturbations of spinning black holes beyond General Relativity: Modified Teukolsky equation
Dongjun Li, Pratik Wagle, Yanbei Chen +1
The detection of gravitational waves from compact binary mergers by the LIGO/Virgo collaboration has, for the first time, allowed for tests of relativistic gravity in the strong, d…