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gr-qc2023
On the existence of sections with constant surface gravity on null hypersurfaces
Ivan P. Costa e Silva, José L. Flores, Benjamín Olea
We identify, in spacetimes satisfying the null convergence condition, a certain natural class of null hypersurfaces that admit null sections with constant surface gravity. Our work…
gr-qc2022★ 4 cited
Omniscient foliations and the geometry of cosmological spacetimes
Ivan P. Costa e Silva, Jose Luis Flores, Jonatan Herrera
We identify certain general geometric conditions on a foliation of a spacetime (M,g) by timelike curves that will impede the existence of null geodesic lines, especially if (M,g) p…