Testing Lambda CDM with the growth function delta(a): Current constraints
| dc.contributor.author | Nesseris, S. | en |
| dc.contributor.author | Perivolaropoulos, L. | en |
| dc.date.accessioned | 2015-11-24T18:34:20Z | |
| dc.date.available | 2015-11-24T18:34:20Z | |
| dc.identifier.issn | 1550-7998 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16913 | |
| dc.rights | Default Licence | - |
| dc.subject | high-redshift supernovae | en |
| dc.subject | probe wmap observations | en |
| dc.subject | lyman-alpha forest | en |
| dc.subject | digital sky survey | en |
| dc.subject | cosmological constant | en |
| dc.subject | power spectrum | en |
| dc.subject | accelerating universe | en |
| dc.subject | legacy survey | en |
| dc.subject | dark-matter | en |
| dc.subject | energy | en |
| dc.title | Testing Lambda CDM with the growth function delta(a): Current constraints | en |
| heal.abstract | We have compiled a data set consisting of 22 data points at a redshift range (0.15, 3.8) which can be used to constrain the linear perturbation growth rate f= dln delta n/dlna. Five of these data points constrain directly the growth rate f through either redshift distortions or change of the power spectrum with redshift. The rest of the data points constrain f indirectly through the rms mass fluctuation sigma(8)(z) inferred from L(y)-alpha at various redshifts. Our analysis tests the consistency of the Lambda CDM model and leads to a constraint of the Wang-Steinhardt growth index gamma [defined from f = Omega(m)(a)(gamma)] as gamma=0.67(-0.17)(+0.20). This result is clearly consistent at 1 sigma with the value gamma = 6/11 = 0.545 predicted by Lambda CDM. We also apply our analysis on a new null test of Lambda CDM which is similar to the one recently proposed by Chiba and Nakamura (arXiv:0708.3877) but does not involve derivatives of the expansion rate H(z). This also leads to the fact that Lambda CDM provides an excellent fit to the current linear growth data. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physrevd.77.023504 | - |
| heal.identifier.secondary | <Go to ISI>://000252864000019 | - |
| heal.identifier.secondary | http://prd.aps.org/abstract/PRD/v77/i2/e023504 | - |
| heal.journalName | Physical Review D | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2008 | - |
| 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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