## Measuring stochastic gravitational-wave energy beyond general relativity

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

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

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...

Integrability conditions when trying to solve for a conformal factor

Modeling black holes’ kicks directly from numerical relativity

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

Interactive toy for visualizing relationship between polynomial roots and coefficients

I’m releasing into the wild a simple code for computing neutron star structure in the slow-rotation expansion to first and second order. This code was origi...

I missed the author index from LRR, so I rebuilt one.

Here to save you some algebra and column-inches

Just an update on talks I gave recently. Valeria Ferrari, Leonardo Gualtieri, and Paolo Pani hosted the conference “New Frontiers in Gravitational-Wave Astr...

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

An identity between vector commutation coefficients and coframe connection coefficients

These three objects form a superalgebra! Whoa!

How to get remote jupyter to automatically open a local browser.

When can you integrate-by-parts with Lie derivatives?

Special thanks to Ben Mares for coming up with this identity.

There is a nice 4-dimensional Weyl identity that I can never seem to remember off the top of my head; so I decided I need to write this note so I don’t have ...

My talk slides/movies from TG17 and APS17

The Weyl decomposition, further splitting into E/B, and computing in terms of 3+1 objects

In an effort to keep myself organized, I decided I should type up some notes I have laying around.

My talk slides/movies from the EHT16 conference in Cambrige, MA

My talk slides/movies from the FF2016 conference at Northwestern

My talk slides/movies from the GR21 conference in NYC

I’m on Episode 64 of the Titanium Physicists Podcast

My talks slides/movies from the 2016 April APS meeting in SLC

Interactive tool for visualizing spherical/circular photon orbits in Kerr

I just created a repo on github for computing complete elliptic integrals in javascript. The README.md is below, and a demo after that. You might ask yoursel...

Just one more committee

I hosted a Quora session. It went well!

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

I’m on Episode 62 of the Titanium Physicists Podcast

That moment when social media creates scientific collaboration

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

The monster topical review has finally been published!

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

Interactive tool to compute Kerr quantities

Interactive tool to compute ISCOs in Kerr

If you’re in the intersection of git, emacs, and persnickety about whitespace.

I’m back in Pasadena!

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.