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gr-qc2026★ 1 cited
Secular evolution of orbital parameters for general bound orbits in Kerr spacetime
Norichika Sago, Ryuichi Fujita, Soichiro Isoyama +1
We analytically derive the secular changes of the orbital parameters, i.e., energy, angular momentum, and Carter constant, for general bound orbits in Kerr spacetime, at leading or…
gr-qc2026
Symplectic mechanics of relativistic spinning compact bodies. III. quadratic-in-spin integrability in Type-D Einstein spacetimes: persistence and breakdown
Paul Ramond, Soichiro Isoyama, Adrien Druart
We investigate the integrability of spinning compact body dynamics at quadratic order in spin in four-dimensional Einstein spacetimes admitting a non-degenerate Killing--Yano tenso…