2002 (IPP)
Permanent URI for this collectionhttp://localhost:4000/handle/11007/627
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Item Non-spherical collapse of a radiating star(2002-04-01) Ghosh, S. G.; Deshkar, D. W.We study the junction conditions for non-spherical (plane symmetric) collapsing ra- diating star consisting of a shearing fluid undergoing radial heat flow with outgoing radiation. Radiation of the system is described by plane symmetric Vaidya solution. Physical quantities relating to the local conservation of momentum and surface red-shift are also obtained.Item Non-marginally bound inhomogeneous dust collapse in higher dimensional space-time(2002-03-01) Ghosh, S. G.; Banerjee, A.We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by a self-similar higher dimensional Tolman-Bondi space-time. Bound, marginally bound and unbound space-times are analyzed. The degree of inhomogeneity of the collapsing matter necessary to form a naked singularity is given.Item Gravitational collapse of null strange quark fluid and cosmic censorship(2002-04-01) Ghosh, S. G.; Dadhich, NareshWe 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.Item Gravitational collapse of type II fluid in higher dimensional space-times(2002-04-30) Ghosh, S. G.We find the general solution of the Einstein equation for spherically symmetric collapse of Type II fluid (null strange quark fluid) in higher dimensions. It turns out that the nakedness and curva- ture strength of the shell focusing singularities carry over to higher dimensions. However, there is shrinkage of the initial data space for a naked singularity of the Vaidya collapse due to the presence of strange quark matter.Item Collapsing perfect fluid in self-similar five dimensional space-time and cosmic censorship(2011-07-06) Ghosh, S. G.; Sarwe, S. B.; Saraykar, R. V.We investigate the occurrence and nature of naked singularities in the gravitational collapse of a self-similar adiabatic perfect fluid in a five dimensional space-time. The naked singularities are found to be gravitationally strong in the sense of Tipler and thus violate the cosmic censorship conjecture.