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On the Kerr metric in a synchronous reference frame

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arxiv 2101.07147 v1 pith:YFSMIMWF submitted 2021-01-18 gr-qc

classification gr-qc
keywords framekerrmetricsynchronouscertaincoordinatesinitialreference
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The Kerr metric is considered in a synchronous frame of reference obtained by using proper time and initial conditions for particles that freely move along a certain set of trajectories as coordinates. Modifying these coordinates in a certain way (keeping their interpretation as initial values at large distances), we still have a synchronous frame and the direct analogue of the Lemaitre metric, the singularities of which are exhausted by the physical Kerr singularity (the singularity ring).

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  1. Generalized Lema\^itre time for rotating and charged black holes and its near-horizon properties

    gr-qc 2025-09 conditional novelty 5.0 of 10

    The finiteness of the generalized Lemaitre time at a black hole horizon is controlled by the sign of the quantity X=E-omega L or X=E-q phi, which also enforces kinematic censorship.

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