Stochastic contribution to the growth factor in the LCDM model
Abstract
We study the effect of noise on the evolution of the growth factor of density perturbations in the context of the LCDM model. Stochasticity is introduced as a Wiener process amplified by an intensity parameter alpha. By comparing the evolution of deterministic and stochastic cases for different values of alpha 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 alpha>0.001.
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1155697
- Report Number(s):
- FERMILAB-PUB-09-869-A
Journal ID: ISSN 1550-7998; PRVDAQ; ArticleNumber: 027302
- DOE Contract Number:
- AC02-07CH11359
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 79; Journal Issue: 2; Journal ID: ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Ribeiro, A. L.B., Andrade, A. P.A., and Letelier, P. S. Stochastic contribution to the growth factor in the LCDM model. United States: N. p., 2009.
Web. doi:10.1103/PhysRevD.79.027302.
Ribeiro, A. L.B., Andrade, A. P.A., & Letelier, P. S. Stochastic contribution to the growth factor in the LCDM model. United States. https://doi.org/10.1103/PhysRevD.79.027302
Ribeiro, A. L.B., Andrade, A. P.A., and Letelier, P. S. 2009.
"Stochastic contribution to the growth factor in the LCDM model". United States. https://doi.org/10.1103/PhysRevD.79.027302. https://www.osti.gov/servlets/purl/1155697.
@article{osti_1155697,
title = {Stochastic contribution to the growth factor in the LCDM model},
author = {Ribeiro, A. L.B. and Andrade, A. P.A. and Letelier, P. S.},
abstractNote = {We study the effect of noise on the evolution of the growth factor of density perturbations in the context of the LCDM model. Stochasticity is introduced as a Wiener process amplified by an intensity parameter alpha. By comparing the evolution of deterministic and stochastic cases for different values of alpha 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 alpha>0.001.},
doi = {10.1103/PhysRevD.79.027302},
url = {https://www.osti.gov/biblio/1155697},
journal = {Physical Review D},
issn = {1550-7998},
number = 2,
volume = 79,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}
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