Abstract
There are reasons to believe that the region of uniform curvature that we observe within our horizon is perhaps a tiny patch, much smaller than the length scales of inhomogeneity and global connectivity of an extremely complicated manifold. However, the recent supernova (SN) results suggest that the horizon scale could be comparable to or even much larger than curvature radius. Non trivial global structure too tends to be of the order of the local curvature scale. Probing (slightly) beyond the cosmic horizon can potentially reveal nontrivial global structure lurking around or just beyond the horizon scale. The cosmic microwave background (CMB) anisotropy is a sensitive probe of the universe on length scales up to and somewhats beyond the horizon scale and is perhaps poised to detect or put interesting limits on non trivial features the global structure. This point is exemplified by high CMB anisotropy signal of the Elliptical topology in a large fraction of the revised parameter space of the closed FRW universe (spherical geometry) currently preferred by SN observations.
Keywords
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.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Dyson, K. K., 1992, I Won’t Let you Go-selected poems of Rabindranath Tagore, (UBS Publishers).
Narlikar, J. V., and Seshadri, T. R., 1985, Astrophys. J., 288, 43.
Perlmutter, S. et al., 1999, preprint (astroph/9812133) (To appear in Astrophys. J. 516).
Wolf, J. A., 1994, Space of Constant Curvature (5th ed.), (Publish or Perish, Inc.); Vinberg, E. B., 1993, Geometry II — Spaces of constant curvature, (Springer-Verlag).
Lachieze-Rey, M. & Luminet, J.-P., 1995, Phys. Rep. 25, 136; Starkman, G., Class. Quantum Grav. 15, 2529, (1998); and other articles in the same issue: Proceedings of Topology and Cosmology, CWRU, Cleveland, Oct. 17-19, 1997.
Ellis, G. F. R., 1971, Gen. Rel. Grav. 2, 7; Sokolov, D. D., and Shvartsman, V. F., 1974, Zh. Eksp. Theor. Fiz. 66, 412; Gott, J. R., 1980, Mon. Not. R. Astr. Soc. 193, 153.
Souradeep, T., in preparation.
Bond, J. R., Pogosyan, D., and Souradeep, T., Class. Quant. Grav., 15, 2671, (1998); ibid., to appear in Phys. Rev. D.
Grishchuk, L. P. and Zeldovich, Ya. B., 1978, Astron. Zh., 55, 209.
Berard, P. H., 1980, Spectral Geometry: Direct and Inverse Problems, Lee. Notes in mathematics, 1207, (Springer-Verlag, Berlin); Chavel, I., 1984, Eigenvalues in Riemannian geometry, (Academic Press).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Souradeep, T. (2000). Probing Beyond the Cosmic Horizon. In: Dadhich, N., Kembhavi, A. (eds) The Universe. Astrophysics and Space Science Library, vol 244. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4050-8_27
Download citation
DOI: https://doi.org/10.1007/978-94-011-4050-8_27
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5784-4
Online ISBN: 978-94-011-4050-8
eBook Packages: Springer Book Archive