A Radical Departure from the ''steady State'' Concept in Cosmology

Radical departure from steady state theory in cosmolog

On the formation of elliptical galaxies

Formation of elliptical galaxie

Mach's principle

The underlying idea in Mach's principle is that the origin of inertia or mass of a particle is a dynamical quantity determined by the environment, in particular the rest of the matter in the universe. In this article, we discuss the role of this idea in the Brans{Dicke theory of gravitation and the Hoyle Narlikar cosmology

Biscalar and bivector Green's functions in de Sitter space time

Biscalar and bivector Green's functions of wave equations are calculated explicitly in de Sitter space time. The calculation is performed by considering the electromagnetic field generated by the spontaneous creation of an electric charge

Time asymmetry in electrodynamics and cosmology

The concept of the 'arrow of time' is discussed in relation to thermodynamics, electrodynamics and cosmology Time symmetric electrodynamics, the absorber theory of radiation and quantum transitions receive attention to develop a working theory applicable to a universe with a perfect future absorber and an imperfect past absorber, such as the steady state cosmological model. It is stated that the approach adopted herein establishes a strong connection between the electrodynamic and cosmological arrows of time, and points a way towards linking these arrows with the thermodynamic one

Nonconservation of baryons in cosmology-revisited

The concept of the steady-state universe discussed by Hoyle & Narlikar two decades ago is revived in the light of the present discussions of the phase transition in the early big-bang universe. It is shown that with suitable scaling the bubble universe solution bears a striking similarity to the inflationary scenarios being discussed today. The currently discussed idea of cosmic baldness was also anticipated in the C-field cosmology of the steadystate universe

Hawking Radiation as a Mechanism for Inflation

The Friedman-Robertson-Walker (FRW) space-time exhibits particle creation similar to Hawking radiation of a black hole. In this essay we show that this FRW Hawking radiation leads to an effective negative pressure fluid which can drive an inflationary period of exponential expansion in the early Universe. Since the Hawking temperature of the FRW space-time decreases as the Universe expands this mechanism naturally turns off and the inflationary stage transitions to a power law expansion associated with an ordinary radiation dominated Universe.Comment: 6 pages. Published version -- Awarded "Honorable Mention" for the 2012 Gravity Research Foundation Essay Contes