New parametrization for the scale dependent growth function in general relativity
| dc.contributor.author | Dent, J. B. | en |
| dc.contributor.author | Dutta, S. | en |
| dc.contributor.author | Perivolaropoulos, L. | en |
| dc.date.accessioned | 2015-11-24T18:39:56Z | |
| dc.date.available | 2015-11-24T18:39:56Z | |
| dc.identifier.issn | 1550-7998 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17525 | |
| dc.rights | Default Licence | - |
| dc.subject | microwave background anisotropies | en |
| dc.subject | high-redshift supernovae | en |
| dc.subject | probe wmap observations | en |
| dc.subject | hubble-space-telescope | en |
| dc.subject | lyman-alpha forest | en |
| dc.subject | dark energy | en |
| dc.subject | cosmological constant | en |
| dc.subject | accelerating universe | en |
| dc.subject | power spectrum | en |
| dc.subject | ia supernovae | en |
| dc.title | New parametrization for the scale dependent growth function in general relativity | en |
| heal.abstract | We study the scale-dependent evolution of the growth function delta(a,k) of cosmological perturbations in dark energy models based on general relativity. This scale dependence is more prominent on cosmological scales of 100h(-1) Mpc or larger. We derive a new scale-dependent parametrization which generalizes the well-known Newtonian approximation result f(0)(a)equivalent to dln delta(0)dlna=Omega(a)(gamma) (gamma=611 for Lambda CDM) which is a good approximation on scales less than 50h(-1) Mpc. Our generalized parametrization is of the form f(a)=f(0)(a)1+xi(a,k), where xi(a,k)=(3H(0)(2)Omega(0m))/(ak(2)). We demonstrate that this parametrization fits the exact result of a full general relativistic evaluation of the growth function up to horizon scales for both Lambda CDM and dynamical dark energy. In contrast, the scale independent parametrization does not provide a good fit on scales beyond 5% of the horizon scale (k similar or equal to 0.01h(-1) Mpc). | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physrevd.80.023514 | - |
| heal.identifier.secondary | <Go to ISI>://000268618800030 | - |
| heal.identifier.secondary | http://prd.aps.org/abstract/PRD/v80/i2/e023514 | - |
| heal.journalName | Physical Review D | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2009 | - |
| 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 |
Αρχεία
Πρωτότυπος φάκελος/πακέτο
1 - 1 of 1
Φόρτωση...
- Ονομα:
- perivolaropoulos-2009-New parametrization for the scale dependent growth function in general relativity.pdf
- Μέγεθος:
- 256.8 KB
- Μορφότυπο:
- Adobe Portable Document Format
Φάκελος/Πακέτο αδειών
1 - 1 of 1
Φόρτωση...
- Ονομα:
- license.txt
- Μέγεθος:
- 1.74 KB
- Μορφότυπο:
- Item-specific license agreed upon to submission
- Περιγραφή: