Fate of bound systems in phantom and quintessence cosmologies
| dc.contributor.author | Nesseris, S. | en |
| dc.contributor.author | Perivolaropoulos, L. | en |
| dc.date.accessioned | 2015-11-24T18:28:34Z | |
| dc.date.available | 2015-11-24T18:28:34Z | |
| dc.identifier.issn | 1550-7998 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16157 | |
| dc.rights | Default Licence | - |
| dc.subject | high-redshift supernovae | en |
| dc.subject | hubble-space-telescope | en |
| dc.subject | cosmic background imager | en |
| dc.subject | probe wmap observations | en |
| dc.subject | equation-of-state | en |
| dc.subject | dark energy | en |
| dc.subject | accelerating universe | en |
| dc.subject | constraints | en |
| dc.subject | anisotropy | en |
| dc.subject | expansion | en |
| dc.title | Fate of bound systems in phantom and quintessence cosmologies | en |
| heal.abstract | We study analytically and numerically the evolution of bound systems in universes with accelerating expansion where the acceleration either increases with time towards a Big Rip singularity (phantom cosmologies) or decreases with time (quintessence). We confirm the finding of Caldwell [R. R. Caldwell, M. Kamionkowski and N. N. Weinberg, Phys. Rev. Lett. 91, 071301 (2003).] that bound structures get dissociated in phantom cosmologies but we demonstrate that this happens earlier than anticipated in Ref. [R. R. Caldwell, M. Kamionkowski and N. N. Weinberg, Phys. Rev. Lett. 91, 071301 (2003).]. In particular we find that the "rip time" when a bound system gets unbounded is not the time when the repulsive phantom energy gravitational potential due to the average (rho+3p) balances the attractive gravitational potential of the mass M of the system. Instead, the "rip time" is the time when the minimum of the time-dependent effective potential (including the centrifugal term) disappears. For the Milky Way galaxy this happens approximately 180 Myrs before the Big Rip singularity instead of approximately 60 Myrs indicated in [R. R. Caldwell, M. Kamionkowski and N. N. Weinberg, Phys. Rev. Lett. 91, 071301 (2003).] for a phantom cosmology with w=-1.5. A numerical reconstruction of the dissociating bound orbits is presented. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physrevd.70.123529 | - |
| heal.identifier.secondary | <Go to ISI>://000226054800046 | - |
| heal.identifier.secondary | http://prd.aps.org/abstract/PRD/v70/i12/e123529 | - |
| heal.journalName | Physical Review D | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2004 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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