Statistical Properties of Cosmological Fluctuations
| dc.creator | Coles, Peter | |
| dc.date | 2002-09-27 | |
| dc.date.accessioned | 2026-07-07T02:05:27Z | |
| dc.date.available | 2026-07-07T02:05:27Z | |
| dc.description | In this pedagogical lecture, I introduce some of the basic terminology and description of fluctuating fields as they occur on cosmology. I define various statistical, cosmological and sample homogeneity and explain what is meant by the fair sample hypothesis and cosmic variance. I illustrate these concepts using the simplest second-order statistics, i.e. the two--point correlation function and its Fourier transform the power-spectrum. I then give a brief overview of the properties of information relating to the properties of the phases of the Fourier modes of cosmological fluctuations which is not contained in these simpler statistics. Specifically, I explain how phase information of a particular form (called quadratic phase coupling) is encoded in the three--point correlation function (or, equivalently, the bispectrum). | |
| dc.description | 26 pages, 1 figure, ro appear in Proceedings of 9th Course on Astrofundamental Physics, International School D. Chalonge, Kluwer, eds N.G. Sanchez and Y.M. Pariiski, uses crckapb.sty | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0209590 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0209590 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/5107 | |
| dc.subject | Astrophysics | |
| dc.title | Statistical Properties of Cosmological Fluctuations | |
| dc.type | text |