Trapped surfaces and spherical closed cosmologies

Show simple item record Malec, Edward Ó Murchadha, Niall 2017-08-29T09:14:26Z 2017-08-29T09:14:26Z 1993
dc.identifier.citation Malec, E. and Ó Murchadha, N. (1993) 'Trapped surfaces and spherical closed cosmologies', Physical Review D, 47(4), 1454-1464 (11pp). doi: 10.1103/PhysRevD.47.1454 en
dc.identifier.volume 47
dc.identifier.issued 4
dc.identifier.startpage 1454
dc.identifier.endpage 1464
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.doi 10.1103/PhysRevD.47.1454
dc.description.abstract This Article (peer-reviewed) gives necessary and sufficient conditions for the formation of trapped surfaces in spherically symmetric initial data defined on a closed manifold. Such trapped surfaces surround a region in which there occurs an enhancement of matter over the average. The conditions are posed directly in terms of physical variables and show that what one needs is a relatively large amount of excess matter confined to a small volume. The expansion of the Universe and an outward flow of matter oppose the formation of trapped surfaces; an inward flow of matter helps. The model can be regarded as a Friedmann-Lemaitre-Walker cosmology with localized spherical inhomogeneities. We show that the total excess mass cannot be too large. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society en
dc.rights © 1993, American Physical Society en
dc.subject Stars en
dc.title Trapped surfaces and spherical closed cosmologies en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Niall Ó Murchadha, Physics, University College Cork, Cork, Ireland. +353-21-490-3000. Email: en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.internal.wokid WOS:A1993KN18200024
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Review D en
dc.internal.IRISemailaddress en

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