Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-04-05
Phys.Rev. D56 (1997) 4578-4591
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.1103/PhysRevD.56.4578
In this paper we explore the connection between anisotropic Gaussian fluctuations and isotropic non-Gaussian fluctuations. We first set up a large angle framework for characterizing non-Gaussian fluctuations: large angle non-Gaussian spectra. We then consider anisotropic Gaussian fluctuations in two different situations. Firstly we look at anisotropic space-times and propose a prescription for superimposed Gaussian fluctuations; we argue against accidental symmetry in the fluctuations and that therefore the fluctuations should be anisotropic. We show how these fluctuations display previously known non-Gaussian effects both in the angular power spectrum and in non-Gaussian spectra. Secondly we consider the anisotropic Grischuk-Zel'dovich effect. We construct a flat space time with anisotropic, non-trivial topology and show how Gaussian fluctuations in such a space-time look non-Gaussian. In particular we show how non-Gaussian spectra may probe superhorizon anisotropy.
Ferreira Pedro G.
Magueijo Joao
No associations
LandOfFree
The closet non-Gaussianity of anisotropic Gaussian fluctuations 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 The closet non-Gaussianity of anisotropic Gaussian fluctuations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The closet non-Gaussianity of anisotropic Gaussian fluctuations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-261011