Research Publications
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Item Luminosity volume test and the local hypothesis of quasars(Indian Academy of Sciences, 1986-01-28) Hoyle, F.; Narlikar, J. V.It is shown that the luminosity-volume test for optically selected objects has an in-built bias towards increasing the average value of V/Vm above the Euclidean value of 1/2. A more satisfactory bias-free statistic is suggested in the form of In (V/Vm), The result of applying the test to a sample from the Bright Quasar Survey (BQS) shows that the local hypothesis of quasars is consistent with the data.Item Radiation of microwaves and infrared by slender graphite needles(Kluwer Academic Publishers, 1984-03-22) Hoyle, F.; Narlikar, J. V.; Wickramasinghe, N. C.It has become clear from sources observed by IRAS that there are many examples which attain maximum emission per unit (frequency) bandwidth longward of 100 μm. Here, we show that a large emissivity at such long wavelengths can be obtained by needle-shaped particles of free carbon. Indeed for needles with a sufficiently high ratio of length to diameter the large emissivity extends from the infrared through the whole microwave region of the spectrum.Item Conformal invariance in physics and cosmology(Colorado Associated University Press, 1972-01-10) Hoyle, F.; Narlikar, J. V.Item Mass difference between the muon and the electron(Nature Publishing Group, 1972-07-14) Hoyle, F.; Narlikar, J. V.The fact that the muon and the electron have different masses can be understood in terms of a machian theory of inertia. The masses of particles are not fixed and immutable but depend on the detailed particle composition of the universe.Item Quantization of wheeler-feynman electrodynamics(Nature Publishing Group, 1970-03-28) Hoyle, F.; Narlikar, J. V.Item Direct particle theory of weak interactions(-, 1972-01-01) Hoyle, F.; Narlikar, J. V.A theory of weak interactions is developed in terms of direct particle action. In its simplest form the theory leads to the formulation given by Feynman and Gell-Mann.Item Cosmological models in a conformally invariant gravitational theory-II : A new model(Wiley-Blackwell, 1972-01-27) Hoyle, F.; Narlikar, J. V.Item Electrodynamics of direct interparticle action I : The quantum mechanical response of the universe(Academic Press, 1969-03-10) Hoyle, F.; Narlikar, J. V.The present paper is the first of a series that seeks to obtain results in agreement with experience from a completely time-symmetric electromagnetic theory-i.e. which does not permit an ad hoc restriction to retarded solutions of time-symmetric equations. It is remarkable that the development of a wholly time-symmetric theory must be along lines entirely different from the usual electrodynamics. While a first quantisation of the particles can readily be carried out, there can be no separate quantisation of the field, since the field is wholly determined by the particles. This raises the question of how practical results that have hitherto been thought to arise from field quantisation can be obtained. The most immediate problem of this kind concerns the spontaneous transitions of atoms. Much of the present paper is directed toward showing that this problem can indeed be solved without the need for field quantisation. Although this question might appear simple compared to other issues in quantum e1ectrodynamics-e.g. vacuum polarisation-it is not trivial in its implication, for the establishment of one such case provides a critical precedent. The path integral method of first quantisation is used to demonstrate that provided the Universe is a perfect absorber along the future light cone the usual formulae for level shifts and for spontaneous transitions can be obtained in a steady-state model of the Universe, but not in open Friedmann models.Item Cosmology and quantum electrodynamics(Nature Publishing Group, 1969-06-14) Hoyle, F.; Narlikar, J. V.Item On the relation of infinitesimal particle propagator to the nature of mass(-, 1972-01-01) Hoyle, F.; Narlikar, J. V.The finite particle propagator can be constructed by a path integral method provided the infinitesimal propagator is known. Hitherto, however, it has not been possible to specify the relativistic infinitesimal propagator except in an ad hoc way. From consideration of the nature of mass, in a Maehian cosmological sense, it is shown in the present paper that the infinitesimal propagator can be derived in relativistic quantum mechanics by a method similar to that used in the nonrelativistie path integral.