A stationary spacetime admits a Killing vector field that is timelike in the region representing stationary observers, in particular near infinity for an asymptotically flat stationary black hole.
In the context of general relativity and the study of spacetimes, "stationary spacetime" refers to a specific type of spacetime that possesses certain symmetries, particularly time invariance. A stationary spacetime is characterized by the following features: 1. **Time Independence**: The geometry of the spacetime does not change with time.
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