Advertisement

An Approach to Anisotropic Cosmologies

  • A. K. Raychaudhuri
Part of the Fundamental Theories of Physics book series (FTPH, volume 29)

Abstract

It is perhaps not wrong to consider Einstein’s 1917 paper on cosmology as the beginning of modern cosmology. It was a peculiar beginning for a branch of physics. Normally, one has some observational data and the theoretician goes on to build up a structure with a minimum of ad-hoc assumptions which help to systematize and ‘explain’ the data. In 1917, Einstein had hardly any observational data to explain and the little he had, he chose to ignore. Even at that time, it was clear that processes are occurring on a large scale leading to a flow of radiation from celestial bodies and, thanks to the ideas of the special theory of relativity, this could be understood as a continuous change in the distribution of sources of gravitation. Besides, it was already known that matter and radiation, even of the same energy density, differ in their energy-stress tensor. All this was enough to indicate that the universe, even if in equilibrium at the same stage, would not continue in that state. Yet Einstein adopted the assumption of a static universe which was also uniform in space and isotropic.

Keywords

Killing Vector Bianchi Type World Line Anisotropic Model Spatial Homogeneity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • A. K. Raychaudhuri
    • 1
  1. 1.Department of PhysicsPresidency CollegeCalcuttaIndia

Personalised recommendations