TY - JOUR AU - Jantzen, Robert T AB - The FrenetSerret curve analysis is extended from non-null to null trajectories in a generic spacetime using the NewmanPenrose formalism, recovering old results which are not well known and clarifying the associated FermiWalker transport which has been left largely unexplored in the literature. This machinery is then used to discuss null circular orbits in stationary axisymmetric spacetimes using the Kerr spacetime as a concrete example, and to integrate the equations of parallel transport along null geodesics in any spacetime. TI - FrenetSerret formalism for null world lines JF - Classical and Quantum Gravity DO - 10.1088/0264-9381/23/11/018 DA - 2006-05-12 UR - https://www.deepdyve.com/lp/iop-publishing/frenetserret-formalism-for-null-world-lines-lttRAFVOzb SP - 3963 EP - 3981 VL - 23 IS - 11 DP - DeepDyve ER -