Generic scenarios of the accelerating Universe

2012
journal article
article
3
cris.lastimport.wos2024-04-09T18:35:36Z
dc.abstract.enRecent astronomical observations strongly indicate that the current Universe is undergoing an accelerated phase of its expansion. If the Universe evolution is described by the FRW model then the acceleration should be driven by some perfect substance violating the strong energy condition. Hence the negative pressure is required for the explanation of acceleration. While different candidates for the fluid termed dark energy have been suggested, the positive cosmological constant seems to be the simplest candidate for dark energy description. However the Lambda term treated as a quantum vacuum energy has no simple physical interpretation because of the fine tuning problem. In this paper we characterize a certain class of evolutional scenario of the accelerating universe from the point of view genericity expressed in notion of structural stability. It is shown that in this class all evolutional scenarios with transient acceleration effect are not generic. Only the LCDM model with the acceleration phase following the deceleration phase is structurally stable. Because the cosmological models with transient acceleration appear in string theory we conclude that they are not generic.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomicznepl
dc.contributor.authorSzydłowski, Marek - 132281 pl
dc.date.accessioned2015-11-20T14:16:59Z
dc.date.available2015-11-20T14:16:59Z
dc.date.issued2012pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number2pl
dc.description.physical389-399pl
dc.description.publication1pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume339pl
dc.identifier.doi10.1007/s10509-012-1005-xpl
dc.identifier.eissn1572-946Xpl
dc.identifier.issn0004-640Xpl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/16991
dc.languageengpl
dc.language.containerengpl
dc.rights.licenceCC-BY
dc.share.typeinne
dc.subject.encosmologypl
dc.subject.enaccelerationpl
dc.subject.enstructural stabilitypl
dc.subtypeArticlepl
dc.titleGeneric scenarios of the accelerating Universepl
dc.title.journalAstrophysics and Space Sciencepl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-09T18:35:36Z
dc.abstract.enpl
Recent astronomical observations strongly indicate that the current Universe is undergoing an accelerated phase of its expansion. If the Universe evolution is described by the FRW model then the acceleration should be driven by some perfect substance violating the strong energy condition. Hence the negative pressure is required for the explanation of acceleration. While different candidates for the fluid termed dark energy have been suggested, the positive cosmological constant seems to be the simplest candidate for dark energy description. However the Lambda term treated as a quantum vacuum energy has no simple physical interpretation because of the fine tuning problem. In this paper we characterize a certain class of evolutional scenario of the accelerating universe from the point of view genericity expressed in notion of structural stability. It is shown that in this class all evolutional scenarios with transient acceleration effect are not generic. Only the LCDM model with the acceleration phase following the deceleration phase is structurally stable. Because the cosmological models with transient acceleration appear in string theory we conclude that they are not generic.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
dc.contributor.authorpl
Szydłowski, Marek - 132281
dc.date.accessioned
2015-11-20T14:16:59Z
dc.date.available
2015-11-20T14:16:59Z
dc.date.issuedpl
2012
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
2
dc.description.physicalpl
389-399
dc.description.publicationpl
1
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
339
dc.identifier.doipl
10.1007/s10509-012-1005-x
dc.identifier.eissnpl
1572-946X
dc.identifier.issnpl
0004-640X
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/16991
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights.licence
CC-BY
dc.share.type
inne
dc.subject.enpl
cosmology
dc.subject.enpl
acceleration
dc.subject.enpl
structural stability
dc.subtypepl
Article
dc.titlepl
Generic scenarios of the accelerating Universe
dc.title.journalpl
Astrophysics and Space Science
dc.typepl
JournalArticle
dspace.entity.type
Publication

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