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https://olympias.lib.uoi.gr/jspui/handle/123456789/16458Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Perivolaropoulos, L. | en |
| dc.date.accessioned | 2015-11-24T18:31:23Z | - |
| dc.date.available | 2015-11-24T18:31:23Z | - |
| dc.identifier.issn | 1550-7998 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16458 | - |
| 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 | cosmological constant | en |
| dc.subject | accelerating universe | en |
| dc.subject | anisotropy | en |
| dc.subject | matter | en |
| dc.title | Constraints on linear negative potentials in quintessence and phantom models from recent supernova data | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | Doi 10.1103/Physrevd.71.063503 | - |
| heal.identifier.secondary | <Go to ISI>://000228490100011 | - |
| heal.identifier.secondary | http://prd.aps.org/abstract/PRD/v71/i6/e063503 | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.publicationDate | 2005 | - |
| heal.abstract | We study quintessence and phantom field theory models based on linear-negative potentials of the form V(phi) = s phi. We investigate the predicted redshift dependence of the equation of state parameter w(z) for a wide range of slopes s in both quintessence and phantom models. We use the Gold data set of 157 SnIa and place constraints on the allowed range of slopes s. We find s = 0 +/- 1.6 for quintessence and s = +/- 0.7 +/- 1 for phantom models (the range is at the 2 sigma level and the units of s are in root 3-M(p)H(0)(2) similar or equal to 10(-38) eV(3) where M(p) is the Planck mass). In both cases the best fit is very close to s similar or equal to 0 corresponding to a cosmological constant. We also show that specific model independent parametrizations of w(z) which allow crossing of the phantom divide line w = - 1 (hereafter PDL) provide significantly better fits to the data. Unfortunately such crossings are not allowed in any phantom or quintessence single field model minimally coupled to gravity. Mixed models (coupled phantom-quintessence fields) can in principle lead to a w(z) crossing the PDL but a preliminary investigation indicates that this does not happen for natural initial conditions. | en |
| heal.journalName | Physical Review D | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| perivolaropoulos-2005-Constraints on linear negative potentials in quintessence and phantom models from recent supernova data.pdf | 215.39 kB | Adobe PDF | View/Open |
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