2 papers
gr-qc2024
Nonlinear dynamics driving the conversion of gravitational and electromagnetic waves in cylindrically symmetric spacetime
Takashi Mishima, Shinya Tomizawa
Using the ``composite harmonic mapping method," we construct exact solutions for cylindrically symmetric gravitational and electromagnetic waves within the Einstein-Maxwell system,…
gr-qc2002
Topological Structure of The Upper End of Future Null Infinity
S. Tomizawa, M. Siino
We propose a method to determine the topological structure of an event horizon far in the future of a spacetime from the geometrical information of its future null infinity. In the…