2025/04/10 by Romain Ruzziconi, Céline Zwikel, Ruzziconi, Romain +1 · 2 citations
Physics and Astronomy · #Relativity and Gravitational Theory #Astrophysical Phenomena and Observations #Experimental and Theoretical Physics Studies
paper · pdf · doi:10.48550/arxiv.2504.08027
We establish a correspondence between the gravitational phase space at null infinity and the subleading phase space near a finite-distance null hypersurface, such as a black hole horizon. Within this framework, we identify the celestial Lw1+∞ symmetries in the subleading phase space at the horizon by constructing their canonical generators and imposing self-duality conditions. This leads to an infinite tower of conserved charges in the absence of radiation, revealing new gravitational observables relevant to black hole physics.