2002 (IPP)

Permanent URI for this collectionhttp://localhost:4000/handle/11007/627

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Author: search.filters.author.Dadhich, NareshHas files: Yes

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    Relativistic world : A common sense perspective
    (2002-03-01) Dadhich, Naresh
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    Why do naked singularities form in gravitational
    (2002-03-12) Joshi, P. S.; Dadhich, Naresh; Roy, Maartens
    We investigate what are the key physical features that cause the development of a naked singularity, rather than a black hole, as the end-state of spherical gravitational collapse. We show that sufficiently strong shearing effects near the singularity delay the formation of the apparent horizon. This exposes the singularity to an external observer, in contrast to a black hole, which is hidden behind an event horizon due to the early formation of an apparent horizon
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    On the spin of gravitational bosons
    (2002-02-01) Ahluwalia, D.V.; Dadhich, Naresh; Kirchbach, M.
    We unearth spacetime structure of massive vector bosons, gravitinos, and gravitons. While the curvatures associated with these particles carry a definite spin, the un- derlying potentials cannot be, and should not be, interpreted as single spin objects. For instance, we predict that a spin measurement in the rest frame of a massive gravitino will yield the result 3/2 with probability one half, and 1/2 with probabil- ity one half. The simplest scenario leaves the Riemannian curvature unaltered; thus avoiding conflicts with classical tests of the theory of general relativity. However, the quantum structure acquires additional contributions to the propagators, and it gives rise to additional phases
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    Gravitational collapse of null strange quark fluid and cosmic censorship
    (2002-04-01) Ghosh, S. G.; Dadhich, Naresh
    We study gravitational collapse of the general spherically symmetric null strange quark fluid having the equation of state, p = (ρ − 4B)/n, where B is the bag constant. An interesting feature that emerges is that the initial data set giving rise to naked singularity in the Vaidya collapse of null fluid gets covered due to the presence of strange quark matter component. Its implication to the Cosmic Censorship Conjecture is discussed.