It has been a half-decade since the first direct detection of gravitational waves, which
signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave …

Asymptotically flat spacetimes have been studied in five separate regions: future/past
timelike infinity $ i^\pm $, future/past null infinity $\mathcal {I}^\pm $, and spatial infinity i 0 …

Gravitational memory effects and the BMS freedoms exhibited at future null infinity have
recently been resolved and utilized in numerical relativity simulations. With this, gravitational …

We propose two frequency-domain filters to analyze ringdown signals of binary black hole
mergers. The first rational filter is constructed based on a set of (arbitrary) quasinormal …

In general relativity, when two black holes merge they produce a rotating (Kerr) black hole
remnant. According to perturbation theory, the remnant emits “ringdown” radiation; a …

We develop new strategies to build numerical relativity surrogate models for eccentric binary
black hole systems, which are expected to play an increasingly important role in current and …

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 …

Quasinormal mode (QNM) modeling is an invaluable tool for characterizing remnant black
holes, studying strong gravity, and testing general relativity. Only recently have QNM studies …

A bstract In a companion paper [1] we introduced the notion of asymptotically Minkowski
spacetimes. These space-times are asymptotically flat at both null and spatial infinity, and …

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