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dc.contributorThe Pennsylvania State University CiteSeerX Archives
dc.contributor.authorHenri-hugues Fliche
dc.date.accessioned2019-10-24T04:09:11Z
dc.date.available2019-10-24T04:09:11Z
dc.date.created2017-01-05 00:55
dc.date.issued2012-11-21
dc.identifieroai:CiteSeerX.psu:10.1.1.245.5097
dc.identifierhttp://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.5097
dc.identifier.urihttp://hdl.handle.net/20.500.12424/833000
dc.description.abstractWith the motivation in mind to evaluate the contribution of the cosmological constant Λ on the foam like patterns formation process in the distribution of galaxies, we investigate the Newtonian dynamics of a spherical void embedded in an uniform medium which undergoes a Hubble expansion. We use a covariant approach for deriving the evolution with time of the shell (S) acting as a boundaries condition for the inside and outside media. As a result, with the usual values for the cosmological parameters, S expands with a huge initial burst that freezes up to matching Hubble flow. With respect to Friedmann comoving frame, its magnification increases nonlinearly with Λ, with a maximal growth rate at redshift z ∼ 1.7. The velocity field inside S shows an interesting feature which enables us to disentangle a spatially closed from open universe. Namely, the void region are swept out in the first case, what can be interpreted as a stability criterion. The understanding of the foam like patterns with large empty regions in the distribution of galaxies 1)–4) has become an important challenge for the formation theory of cosmological structures. 5) Our motivation for understanding the dynamics of a
dc.format.mediumapplication/pdf
dc.languageen
dc.language.isoeng
dc.rightsMetadata may be used without restrictions as long as the oai identifier remains attached to it.
dc.titleCentre de Physique Théorique
dc.typetext
ge.collectioncodeOAIDATA
ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:10429525
ge.identifier.permalinkhttps://www.globethics.net/gel/10429525
ge.lastmodificationdate2017-01-05 00:55
ge.lastmodificationuseradmin@pointsoftware.ch (import)
ge.submissions0
ge.oai.exportid148934
ge.oai.repositoryid54
ge.oai.streamid2
ge.setnameGlobeEthicsLib
ge.setspecglobeethicslib
ge.linkhttp://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.5097
ge.linkhttp://arxiv.org/pdf/0801.2883v1.pdf


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