Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0808.0003)
· References in the article
· Citations to the Article (23) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Testing cosmological structure formation using redshift-space distortions
Authors:
Percival, Will J.; White, Martin
Affiliation:
AA(Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, P01 2EG), AB(Departments of Physics and Astronomy, University of California, Berkeley, CA 94720, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 393, Issue 1, pp. 297-308. (MNRAS Homepage)
Publication Date:
02/2009
Origin:
MNRAS
MNRAS Keywords:
large-scale structure of Universe
DOI:
10.1111/j.1365-2966.2008.14211.x
Bibliographic Code:
2009MNRAS.393..297P

Abstract

Observations of redshift-space distortions in spectroscopic galaxy surveys offer an attractive method for observing the build-up of cosmological structure. In this paper, we develop and test a new statistic based on anisotropies in the measured galaxy power spectrum, which is independent of galaxy bias and matches the matter power spectrum shape on large scales. The amplitude provides a constraint on the derivative of the linear growth rate through fσ8(mass). This demonstrates that spectroscopic galaxy surveys offer many of the same advantages as weak lensing surveys, in that they both use galaxies as test particles to probe all matter in the Universe. They are complementary as redshift-space distortions probe non-relativistic velocities and therefore the temporal metric perturbations, while weak lensing tests the sum of the temporal and spatial metric perturbations. The degree to which our estimator can be pushed into the non-linear regime is considered and we show that a simple Gaussian damping model, similar to that previously used to model the behaviour of the power spectrum on very small scales, can also model the quasi-linear behaviour of our estimator. This enhances the information that can be extracted from surveys for Λ cold dark matter (ΛCDM) models.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints