Darker Side of the Universe
Astrophysics
2007-05-23 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Observations suggest that nearly seventy per cent of the energy density in the universe is unclustered and exerts negative pressure. Theoretical understanding of this component (`dark energy'), which is driving an accelerated expansion of the universe, is {\it the} problem in cosmology today. I discuss this issue with special emphasis on the cosmological constant as the possible choice for the dark energy. Several curious features of a universe with a cosmological constant are described and some possible approaches to understand the nature of the cosmological constant are discussed.
Cite
@article{arxiv.astro-ph/0510492,
title = {Darker Side of the Universe},
author = {T. Padmanabhan},
journal= {arXiv preprint arXiv:astro-ph/0510492},
year = {2007}
}
Comments
Invited Review Talk at the 29th International Cosmic Ray Conference, Aug 3-10, 2005, Pune, India; to appear in the proceedings; 15 pages; 2 figures