Interpreting Large Scale Structure Observations

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dc.creatorLyth, David H
dc.creatorLiddle, Andrew R
dc.date1994-08-18
dc.date.accessioned2026-07-07T02:19:22Z
dc.date.available2026-07-07T02:19:22Z
dc.descriptionThe standard model of large scale structure is considered, in which the structure originates as a Gaussian adiabatic density perturbation with a nearly scale invariant spectrum. The basic theoretical tool of cosmological perturbation theory is described, as well as the possible origin of the density perturbation as a vacuum fluctuation during inflation. Then, after normalising the spectrum to fit the cosmic microwave background anisotropy measured by COBE, some versions of the standard model are compared with a variety of data coming from observations of galaxies and galaxy clusters. The recent COBE analysis of Górski and collaborators is used, which gives a significantly higher normalization than earlier ones. The comparison with galaxy and cluster data is done using linear theory, supplemented by the Press-Schechter formula when discussing object abundances of rich clusters and of damped Lyman alpha systems. By focussing on the smoothed density contrast as a function of scale, the observational data can be conveniently illustrated on a single figure, facilitating easy comparison with theory. The spectral index is constrained to $0.6<n<1.1$, and in particle physics motivated models that predict significant gravitational waves the lower limit is tightened to $0.8$. [To appear, Proceedings of Journee Cosmologie, Paris, June 1994]
dc.description36 pages, standard LaTeX plus three uuencoded postscript figures, SUSSEX-AST 94/8-2
dc.identifierhttps://arxiv.org/abs/astro-ph/9408066
dc.identifierhttp://arxiv.org/abs/astro-ph/9408066
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9837
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleInterpreting Large Scale Structure Observations
dc.typetext

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