Null geodesics in the static Ernst space-time

Dhurandhar, S. V. ; Sharma, D. N. (1983) Null geodesics in the static Ernst space-time Journal of Physics A: Mathematical and General, 16 (1). pp. 99-106. ISSN 0305-4470

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The null geodesics in the equatorial plane of the Ernst space-time have been studied. It is found that they fall essentially into two types depending on the value of the dimensionless magnetic field parameter beta . If beta is less than beta c=0.094 68 then there exist persisting orbits and stable and unstable circular orbits. However, for beta > beta c there are no persisting orbits and every particle with non-zero angular momentum must fall into the singularity. For beta > 0 no particle with non-zero angular momentum can escape to infinity. The weak field case beta «1 has been treated in detail and the radii of the stable and unstable circular orbits have been obtained in this limit. Finally, the gravitational redshift has been calculated relative to static observers.

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ID Code:9782
Deposited On:02 Nov 2010 04:06
Last Modified:30 May 2011 08:27

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