We review the role that infinite-dimensional symmetries arising at the boundary of
asymptotically flat spacetimes play in the context of the celestial holography program. Once …

This paper is the fourth in a series dedicated to the mathematically rigorous asymptotic
analysis of gravitational radiation under astrophysically realistic set-ups. It provides an …

Gravity in 4 d asymptotically flat spacetime constitutes the archetypal example of a
gravitational system with leaky boundary conditions. Pursuing our previous analysis of …

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 …

A bstract We demonstrate that the one-loop exact subleading soft graviton theorem
automatically follows from conservation of the BMS charges, provided that the hard and soft …

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 …

A bstract Soft graviton theorems receive one-loop contributions that are logarithmic in the
energy of the soft graviton, and which are closely related to tails of gravitational waveforms …

In this paper, we study codimension two holography in flat spacetimes, based on the idea of
the wedge holography. We propose that a region in ad+ 1 dimensional flat spacetime …

A bstract We develop the analysis of the asymptotic properties of gravity in higher spacetime
dimensions D, with a particular emphasis on the case D= 5. Our approach deals with spatial …

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 …