Celestial $w_{1+\infty}$ charges and the subleading structure of asymptotically-flat spacetimes
Celestial $w_{1+\infty}$ charges and the subleading structure of asymptotically-flat spacetimes
We study the subleading structure of asymptotically-flat spacetimes and its relationship to the $w_{1+\infty}$ loop algebra of higher spin charges. We do so using both the Bondi-Sachs and the Newman-Penrose formalism, via a dictionary built from a preferred choice of tetrad. This enables us to access properties of the so-called …