Please use this identifier to cite or link to this item:
|Type:||Artigo de periódico|
|Title:||Stochastic Contribution To The Growth Factor In The Λcdm Model|
|Abstract:||We study the effect of noise on the evolution of the growth factor of density perturbations in the context of the ΛCDM model. Stochasticity is introduced as a Wiener process amplified by an intensity parameter α. By comparing the evolution of deterministic and stochastic cases for different values of α we estimate the intensity level necessary to make noise relevant for cosmological tests based on large-scale structure data. Our results indicate that the presence of random forces underlying the fluid description can lead to significant deviations from the nonstochastic solution at late times for α≥10-3. © 2009 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.