Extension of photon surfaces and their area: Static and stationary spacetimes
Extension of photon surfaces and their area: Static and stationary spacetimes
We propose a new concept, the transversely trapping surface (TTS), as an extension of the static photon surface characterizing the strong gravity region of a static/stationary spacetime in terms of photon behavior. The TTS is defined as a static/stationary timelike surface $S$ whose spatial section is a closed two-surface, such …