P C Vaidya
Articles written in Pramana – Journal of Physics
Volume 3 Issue 1 July 1974 pp 28-34 General Relativity
A generalized kerr-schild metric
A metric
Volume 8 Issue 6 June 1977 pp 512-517 General Relativity
The Kerr metric in cosmological background
A metric satisfying Einstein’s equations is given which in the vicinity of the source reduces to the well-known Kerr metric and which at large distances reduces to the Robertson-Walker metric of a homogeneous cosmological model. The radius of the event horizon of the Kerr black hole in the cosmological background is found out.
Volume 22 Issue 3-4 March 1984 pp 151-158 Relativity And Cosmology
Kerr metric in the deSitter background
In addition to the Kerr metric with cosmological constant Λ several other metrics are presented giving a Kerr-like solution of Einstein’s equations in the background of deSitter universe. A new metric of what may be termed as rotating deSitter space-time—a space-time devoid of matter but containing null fluid with twisting null rays, has been presented. This metric reduces to the standard deSitter metric when the twist in the rays vanishes. Kerr metric in this background is the immediate generalization of Schwarzschild’s exterior metric with cosmological constant.
Volume 25 Issue 5 November 1985 pp 513-518 General Relativity
deSitter space-time and rotation
A metric containing a parameter
The metric of the deSitter family of space-times contains a further parameter
Volume 27 Issue 1-2 July 1986 pp 63-72 Electromagnetics, Statistical Mechanics And General Relativity
Gravitational fields with space-times of Bianchi type IX
Spatially homogeneous space-times of Bianchi type IX are considered. A general scheme for the derivation of exact solutions of Einstein’s equations corresponding to perfect fluid plus pure radiation fields is outlined. Some simple rotating Bianchi type IX cosmological models are presented. The details of these solutions are also discussed.
Volume 32 Issue 6 June 1989 pp 731-739 General Relativity And Gravitation
Radiating Kerr particle in Einstein universe
A generalized Kerr-NUT type metric is considered in connection with Einstein field equations corresponding to perfect fluid plus a pure radiation field. A general scheme for obtaining the exact solutions of these field equations is developed. Two physically meaningful particular cases are investigated in detail. One gives the field of a radiating Kerr particle embedded in the Einstein universe. The other solution may probably represent a deSitter-like universe pervaded by a pure radiation field.
Volume 46 Issue 5 May 1996 pp 341-348
A spherically symmetric gravitational collapse-field with radiation
An interior spherically symmetric solution of Einstein’s field equations corresponding to perfect fluid plus a flowing radiation-field is presented. The physical 3-space
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