Abstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders
about the fundamental theory of nature at play in the extreme gravity regime, where the …

It is a long-standing problem in general relativity that the notion of angular momentum of an
isolated system has supertranslation ambiguity. In this paper, we argue that the ambiguity is …

A bstract The surface charge algebra of generic asymptotically locally (A) dS 4 spacetimes
without matter is derived without assuming any boundary conditions. Surface charges …

We present a detailed analysis of gravity in a partial Bondi gauge, where only the three
conditions $ g_ {rr}= 0= g_ {rA} $ are fixed. We relax in particular the so-called determinant …

We revisit gravitational wave (GW) memory as the key to measuring spacetime symmetries,
extending beyond its traditional role in GW searches. In particular, we show how these …

We study the subleading structure of asymptotically-flat spacetimes and its relationship to
the w1+∞ loop algebra of higher spin charges. We do so using both the Bondi–Sachs and …

Gravitational-wave memory effects arise from nonoscillatory components of gravitational-
wave signals, and they are predictions of general relativity in the nonlinear regime that have …

A bstract Asymptotically flat spacetimes admit both supertranslations and Lorentz
transformations as asymptotic symmetries. Furthermore, they admit super-Lorentz …

A bstract In our previous work, we proposed an algorithm to transform the metric of an
isolated matter source in the multipolar post-Minkowskian approximation in harmonic (de …

We show that gravitational waves cause freely falling gyroscopes to precess relative to fixed
distant stars, extending the stationary Lense-Thirring effect. The precession rate decays as …