A Numerical Examination of Certain Null Geodesics of a High Angular Momentum Kerr Field

Details A Numerical Examination of Certain Null Geodesics of a High Angular Momentum Kerr Field A Numerical Examination of Certain Null Geodesics of a High Angular Momentum Kerr Field

Oct 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ijtp....6..281f&link_type=abstract

International Journal of Theoretical Physics, Volume 6, Issue 3-4, pp. 281-291

Physics

1

Scientific paper

An observer situated anywhere but in the equatorial plane of a high angular momentum Kerr field cannot see the ring singularity. In the visual field of such an observer, what demarcates his own universe from that through the ring? The projections onto a certain submanifold of the null geodesics which pass through a point on the symmetry axis of a specific Kerr field are examined numerically. All the distinct projections are obtained by varying one parameter, essentially the quadratic Killing tensor constant. Various interesting features of the geodesics emerge. Through the ring is a region in which there exist closed time-like curves and which can be used to construct closed time-like curves through any non-singular point of the manifold. Only geodesies of negative angular momentum can enter this region.

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