Quasi-local photon surfaces in general spherically symmetric spacetimes

• Published in: The European physical journal. C, Particles and fields Vol. 81; no. 8; pp. 1 - 16
• Main Authors: Cao, Li-Ming, Song, Yong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2021; Springer; Springer Nature B.V; SpringerOpen
• Subjects: Analysis; Astronomy; Astrophysics and Cosmology; Boundary conditions; Differential equations; Elementary Particles; Event horizon; Gravitational collapse; Gravitational fields; Gravity; Hadrons; Heavy Ions; Hyperspaces; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Photons; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; Relativity; Spacetime; String Theory

Based on the geometry of the codimension-2 surface in general spherically symmetric spacetime, we give a quasi-local definition of a photon sphere as well as a photon surface. This new definition is the generalization of the one provided by Claudel, Virbhadra, and Ellis but without referencing any u...