Seminarium Teorii Względności i Grawitacji

I will discuss the canonical energy, and its flux, in the radiating regime for spacetimes with $\Lambda > 0$, which generalizes the classical definition of Trautman and Bondi for $\Lambda = 0$. Since the energy diverges in the presence of a positive cosmological constant, a renormalized energy will be analyzed. I will first briefly present the linearized gravity case (arXiv:2103.05982) and then pass to the full non-linear theory (arXiv:1603.07018).