Professor Jayant V. Narlikar
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Item Cosmology and action at a distance electrodynamics(American Physical Society, 1995-04-24) Hoyle, F.; Narlikar, J. V.This article reviews the developments in the electrodynamics of direct interparticle action, em-phasizing the achievements in quantum as well as classical electrodynamics. It is shown that the application of the Wheeler-Feynman absorber theory of radiation places stringent requirements on the asymptotic future and past light cones of the universe. All Friedmann cosmologies fail to meet these requirements, but the steady-state and the quasi-steady-state models have the right kind of structure to make the theory work. Further, it is shown that the working theory is free from the problems of divergence that trouble the classical and quantum field theory. In particular, no renormalization is needed: The bare mass and bare charge of an electron are finite. A few ideas relating to the response of the universe to a local microscopic experiment are presented as well as on possible clues to the outstanding issues of foundations of quantum theoryItem Quasi-steady state cosmology(International Astronomical Union, 1994-03-12) Hoyle, F.; Burbidge, G.; Narlikar, J. V.Item Further astrophysical quantities expected in a quasi steady state universe(EDP Sciences, 1994-02-06) Hoyle, F.; Burbidge, G.; Narlikar, J. V.In two previous papers we have described a new cosmological model which we have called the quasi-steady state cosmological model (QSSC) (Hoyle et al. 1993, 1994). In this theory matter is created only in strong gravitational fields associated with dense aggregates of matter. In this paper and in Hoyle et al. (1994) we are attempting to show that many aspects of the observable universe are explicable using this theory so that it is a reasonable alternative to the classical Big-Bang model which has been so widely accepted. We first review briefly the theory of the creation process and show how we arrived at the quasi-oscillatory model. In later sections we show how two of the three parameters of the theory P, and Q, are related to two observed quantities. Q is related to the value of the Hubble constant H0 at the present epoch, and the counts of radio sources enable us to determine P/Q and hence P. We find that Q = 40 40⁹ years and P = 8 10¹¹ years. We then calculate numerical values for the mass density in the universe and the rate of creation. Finally, we discuss the properties of galaxies including faint galaxies, creation events in individual galaxies, and the mass-to-light ratios in galaxies and clusters. The results here are particularly interesting since in this model stars can be much older than H₀¯¹. This means that much of the mass in galaxies will naturally be baryonic and will consist of evolved stars. Thus very large mass-to-light ratios are expected in galaxies and in clusters. We conclude by summarizing the results obtained in all three papers. More work is required, particularly on the cosmogonical aspects of the theory, but a very attractive aspect of it is that the creation process in the centers of galaxies leads to a comparatively simple way of understanding explosive phenomena.Item Cosmology and quantum electrodynamics(Nature Publishing Group, 1969-06-14) Hoyle, F.; Narlikar, J. V.Item Effect of quantum conditions in a Friedmann cosmology(Nature Publishing Group, 1970-11-07) Hoyle, F.; Narlikar, J. V.Item Cosmology and electrodynamics(Nature Publishing Group, 1968-11-30) Hoyle, F.; Narlikar, J. V.Item Cosmology and quantum electrodynamics(Nature Publishing Group, 1968-07-27) Hoyle, F.; Narlikar, J. V.Item Time-symmetrical electrodynamics and cosmology(Cornell University, 1967-04-15) Hoyle, F.; Narlikar, J. V.Item Quasi-steady state cosmological model with creation of matter(American Astronomical Society, 1993-06-20) Hoyle, F.; Burbidge, G.; Narlikar, J. V.Item Radical departure from the ‘steady state’ concept in cosmology(Royal Society, 1966-02-22) Hoyle, F.; Narlikar, J. V.The results in this paper are based on an entirely different choice of the undetermined coupling contant f which appears in the theory of creation of matter. Previously f waschosen to make the steady-state expansion rate coincident with the observed expansion rate. Now that we take a much larger value for f, the corresponding steady-state expansion rate is much greater than the observed value. We interpret this difference as showing that we live in a wide, possibly temporary, fluctuation from the steady-state situation. The expansion rate in such a fluctuation follows the Einstein-de Sitter relations. The natural scale set by the new steady-state corresponds to the masses of clusters of galaxies, we obtain 1013M? instead of 1023M? for the 'observable universe'. It is suggested that elliptical galaxies were formed early in the development of a fluctuation. Our discussion of high energy phenomena leads to immediate explanations of the energy spectrum of cosmic rays, of the presence of e+ in cosmic rays and of the rate of energy production associated with radio sources.