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Encoding cosmological futures with conformal structures

Scott, Susan M; Hoehn, Philipp

Description

Quiescent cosmology and the Weyl curvature hypothesis possess a mathematical framework, namely the definition of an isotropic singularity, but only for the initial state of the universe. A complementary framework is necessary to also encode appropriate cosmological futures. In order to devise a new framework we analyse the relation between regular conformal structures and (an)isotropy, the behaviour and role of a monotonic conformal factor which is a function of cosmic time, as well as four...[Show more]

dc.contributor.authorScott, Susan M
dc.contributor.authorHoehn, Philipp
dc.date.accessioned2015-12-07T22:15:21Z
dc.identifier.issn0264-9381
dc.identifier.urihttp://hdl.handle.net/1885/17879
dc.description.abstractQuiescent cosmology and the Weyl curvature hypothesis possess a mathematical framework, namely the definition of an isotropic singularity, but only for the initial state of the universe. A complementary framework is necessary to also encode appropriate cosmological futures. In order to devise a new framework we analyse the relation between regular conformal structures and (an)isotropy, the behaviour and role of a monotonic conformal factor which is a function of cosmic time, as well as four example cosmologies for further guidance. Finally, we present our new definitions of an anisotropic future endless universe and an anisotropic future singularity which offer a promising realization for the new framework. Their irregular, degenerate conformal structures differ significantly from those of the isotropic singularity. The combination of the three definitions together could then provide the first complete formalization of the quiescent cosmology concept. For completeness we also present the new definitions of an isotropic future singularity and a future isotropic universe. The relation to other approaches, in particular to the somewhat dual dynamical systems approach, and other asymptotic scenarios is briefly discussed.
dc.publisherInstitute of Physics Publishing
dc.sourceClassical and Quantum Gravity
dc.titleEncoding cosmological futures with conformal structures
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume26
dc.date.issued2009
local.identifier.absfor020105 - General Relativity and Gravitational Waves
local.identifier.ariespublicationu9212960xPUB2
local.type.statusPublished Version
local.contributor.affiliationScott, Susan M, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHoehn, Philipp, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue035019
local.bibliographicCitation.startpage34
local.identifier.doi10.1088/0264-9381/26/3/035019
dc.date.updated2015-12-07T07:45:01Z
local.identifier.scopusID2-s2.0-68949218905
local.identifier.thomsonID000262585300019
CollectionsANU Research Publications

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