## Approximate helical symmetry in compact binaries

The inspiral of a circular, non-precessing binary exhibits an approximate helical symmetry. The effects of eccentricity, precession, and radiation reacti...

In online databases:
arXiv,
ADS,
ORCiD,
Google Scholar,
and
INSPIRE.

I also curate all my publications below for some attempt at
consistency.

The inspiral of a circular, non-precessing binary exhibits an approximate helical symmetry. The effects of eccentricity, precession, and radiation reacti...

Highly precise and robust waveform models are required as improvements in detector sensitivity enable us to test general relativity with more precision t...

Gravitational memory effects and the BMS freedoms exhibited at future null infinity have recently been resolved and utilized in numerical relativity simu...

We numerically investigate the imprints of gravitational radiation-reaction driven changes to a black hole’s mass and spin on the corresponding ringdown ...

In this short Note, I answer the titular question: Yes, a radiation gauge can be horizon-locking. Radiation gauges are very common in black hole perturbat...

Numerical relativity (NR) simulations of binary black holes provide precise waveforms, but are typically too computationally expensive to produce wavefor...

Numerical relativity simulations provide the most precise templates for the gravitational waves produced by binary black hole mergers. However, many of t...

We present a numerical-relativity simulation of a black hole - neutron star merger in scalar-tensor (ST) gravity with binary parameters consistent with t...

This article was selected as an ❦ Editors’ Suggestion, and Featured in APS’s Physics magazine. More press coverage links here.

The Bondi-van der Burg-Metzner-Sachs (BMS) group, which uniquely describes the symmetries of asymptotic infinity and therefore of the gravitational waves...

One of the key ingredients for making binary waveform predictions in a beyond-GR theory of gravity is understanding the energy and angular momentum carri...

One of the important targets for the future space-based gravitational wave observatory LISA is extreme mass ratio inspirals (EMRIs), where long and accur...

Quasi-normal mode (QNM) modeling is an invaluable tool for characterizing remnant black holes, studying strong gravity, and testing general relativity. ...

Accurate and efficient modeling of the dynamics of binary black holes (BBHs) is crucial to their detection through gravitational waves (GWs), with LIGO/V...

We revisit a textbook example of a singularly perturbed nonlinear boundary-value problem. Unexpectedly, it shows a wealth of phenomena that seem to have ...

Perturbation theory is a crucial tool for many physical systems, when exact solutions are not available, or nonperturbative numerical solutions are intra...

Understanding the Bondi-Metzner-Sachs (BMS) frame of the gravitational waves produced by numerical relativity is crucial for ensuring that analyses on su...

We present a new study of remnant black hole properties from 13 binary black hole systems, numerically evolved using the Spectral Einstein Code. The mass...

We perform a new test of general relativity (GR) with signals from GWTC-2, the LIGO and Virgo catalog of gravitational wave detections. We search for the...

We show that an eccentric binary of black holes with misaligned spins is integrable at 2PN order. We also construct 4 out of 5 action variables at 1.5PN.

We study the structure of asymptotic null infinity in the Brans-Dicke theory of gravity

Merger dynamics create an attractive fixed-point in the space of distributions

The first astrophysically-relevant numerical simulation of merging black holes in a higher-curvature theory beyond GR.

The dividing line between bound and plunging orbits is an algebraic variety

qnm is an open-source Python package for computing the Kerr quasinormal mode frequencies, angular separation constants, and spherical-spheroidal mixing coeff...

The first numerical beyond-GR binary black hole merger simulation.

A surrogate model extending the parameter space range of fully precessing quasicircular inspirals

Accurate models of gravitational waves from merging black holes are necessary for detectors to observe as many events as possible while extracting the maximu...

Real-time interactive visualizations of merging black holes in seconds!

Modeling black holes remnants directly from numerical relativity

Gravity theories beyond general relativity (GR) can change the properties of gravitational waves: their polarizations, dispersion, speed, and, importantly, e...

The grand challenges of contemporary fundamental physics—dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities an...

In theories of gravity that include a scalar field, a compact object’s scalar charge is a crucial quantity since it controls dipole radiation, which can be s...

Modeling black holes’ kicks directly from numerical relativity

Finding the shape of extremal black holes in beyond-GR theories

Whenever you’ve got symmetry, you should use it!

One of the first numerical simulations of black hole mergers in beyond-GR effective field theories

Angular momentum is tricky to define in GR! Here’s an approach so that observers can all agree with each others’ measurements.

Invited review for CQG Focus Issue

Progress in understanding the structure of extremal black holes in Chern-Simons

Not all theories with long-ranged scalar fields produce dipole radiation in binaries

A generalization of symplectic integrators to non-conservative dynamics.

A major review on non-GR theories, black holes and neutron stars in non-GR theories, compact binaries in non-GR theories, and pulsar, gravitational-wave, and...

Extending Hamilton’s variational principle to nonconservative systems.

Explaining why universality emerges in compact objects.

Numerical solutions for rapidly-rotating dCS black holes show where the weak-coupling expansion breaks down.

Short note simplifying a calculation in the literature.

Universal relations between the Newtonian multipole moments of rotating stars.

Connecting observables (pulsar binary pericenter precession and gravitational wave phase) to the parameters and structure of theoretical models.

Chern-Simons corrections to 1) internal structure (including mass shift) and 2) binary dynamics (including pericenter precession) of neutron stars.

MIT PhD thesis of Leo C. Stein

The post-Newtonian calculation scheme applied to binary inspirals in a broad class of almost-GR theories.

Applying symplectic geometry to understand and refine Hamiltonian MC.

Parametrizing deviations from purely GR, vacuum black holes.

The deformation to spherically symmetric black holes under a class of corrections to general relativity.

Computing how much energy and momentum gravitational waves carry in a very broad class of almost-GR theories.

Turning an O(n^2) problem into an O(n log n) problem in radio interferometry, similar in spirit to how the fast Fourier transform operates.

Autonomous gravitational-wave searches—fully automated analyses of data that run without human intervention or assistance—are desirable for a number of re...

How to overconstrain the problem of discriminating gravitational wave signals from detector noise and glitches.