How big is a black hole?

Marios Christodoulou (1) , Carlo Rovelli (1)

1 CPT - E4 Gravité quantique

The 3d volume inside a spherical black hole can be defined by extending an intrinsic flat-spacetime characterization of the volume inside a 2-sphere. For a collapsed object, the volume grows with time since the collapse, reaching a simple asymptotic form, which has a compelling geometrical interpretation. Perhaps surprising, it is large. The result may have relevance for the discussion on the information paradox.

Domaines: Relativité Générale et Cosmologie Quantique [gr-qc]

Marios Christodoulou, Carlo Rovelli. How big is a black hole?. Physical Review D, 2015, 91 (6), pp.064046. ⟨10.1103/PhysRevD.91.064046⟩. ⟨hal-01255167⟩