Cosmic Microwave Anisotropies from Topological Defects in an Open Universe

Details Cosmic Microwave Anisotropies from Topological Defects in an Open Universe Cosmic Microwave Anisotropies from Topological Defects in an Open Universe

1994-08-31

arxiv.org/abs/astro-ph/9408103v1

Phys.Rev.D51:4099-4110,1995

Astronomy and Astrophysics

Astrophysics

35 RevTeX 3.0 pages without 9 figures. Full postscript file including figures available by anonymous ftp from astro.princeto

Scientific paper

10.1103/PhysRevD.51.4099

We present a general formalism for computing Cosmic Background Radiation (CBR) and density fluctuations in open models with stiff sources. We find analytic Green's functions for the linearized Einstein equations in the presence of stiff sources and use this formalism to estimate the amplitude and harmonic spectrum of microwave background fluctuations produced by topological defects in an open universe. Unlike inflationary models that predict a flat universe and a spectrum of CBR fluctuations that is enhanced at large angular scales, defect models predict that CBR fluctuations are suppressed on angular scales larger than that subtended by the curvature scale. In an $\Omega = 0.2 - 0.4$ universe, these models, when normalized to the amplitude of CBR fluctuations observed by COBE, require a moderate bias factor, $2-3$, to be compatible with the observed fluctuations in galaxy counts. In these models, accurate predictions can be made which are testable through CBR experiments in the near future. A CBR measurement of $\Omega$ would then be possible, up to the limit imposed by cosmic variance. We discuss some of the philosophical implications of an open model and propose a solution to the flatness problem.

Affiliated with

Also associated with

No associations

Rating

Cosmic Microwave Anisotropies from Topological Defects in an Open Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmic Microwave Anisotropies from Topological Defects in an Open Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic Microwave Anisotropies from Topological Defects in an Open Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-352700