Research Papers (JVN)

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Now showing 1 - 5 of 5

General relativity and astrophysics
(Springer, 2010-11-27) Narlikar, J. V.
Role of white holes in astrophysics
(Macmillan, 1978-01-20) Narlikar, J. V.
Angular appearance of white holes
(Springer, 1978-01-22) Narlikar, J. V.; Kapoor, R. C.
It is shown that non-radial light rays emitted from the surface of a white hole can emerge from inside the Schwarzschild barrier. The upper limit on their impact parameter is calculated under the requirement that such rays are blueshifted. The apparent angular size of the white hole determined by blueshifted rays is shown to grow so rapidly in the early stages of its expansion that it produces the appearance of superluminal expansion.
White holes and high energy astrophysics
(Kluwer Academic Publishers, 1975-01-01) Narlikar, J. V.; Apparao, K. M. V.
The role of exploding objects in high-energy astrophysics is discussed. Quantitative results are obtained for the simple case of the canonical white hole which explodes from a singularity and consists of pressure-free matter in the comoving frame of reference. General relativity is used for calculating the dynamical results. Applications to X-ray background, transient X-ray sources, gamma-ray bursts, and high energy cosmic rays are considered. White holes of more general types are discussed in a qualitative manner.
High energy radiation from white holes
(Nature Publishing Group, 1974-10-18) Narlikar, J. V.; Apparao, K. M. V.; Dadhich, Naresh