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Non-linear galaxy power spectrum and cosmological parameters

Cooray, Asantha (2004) Non-linear galaxy power spectrum and cosmological parameters. Monthly Notices of the Royal Astronomical Society, 348 (1). pp. 250-260. ISSN 0035-8711. doi:10.1111/j.1365-2966.2004.07358.x.

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The galaxy power spectrum is now a well-known tool of precision cosmology. In addition to the overall shape, baryon oscillations and the small-scale suppression of power by massive neutrinos capture complementary information on cosmological parameters when compared with the angular power spectrum of cosmic microwave background anisotropies. We study both the real-space and redshift-space galaxy power spectra in the context of non-linear effects, and model them based on the halo approach to large-scale structure clustering. We consider potential systematics in the cosmological parameter determination when non-linear effects are ignored and the galaxy power spectrum is described with the linear power spectrum scaled by a constant bias factor. We suggest that significant improvements can be made when non-linear effects are taken into account as a power-law contribution with two additional parameters to be determined from the data. In addition to cosmological parameters through galaxy clustering, such an approach allows a determination of useful information related to astrophysics on how galaxies occupy dark matter haloes.

Item Type:Article
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URLURL TypeDescription Paper
Cooray, Asantha0000-0002-3892-0190
Additional Information:© 2004 RAS. Accepted 2003 October 27; Received 2003 October 15; in original form 2003 August 12. Published: 11 February 2004. We acknowledge useful discussions with O. Lahav on the 2dFGRS power spectrum. This work is supported by the Sherman Fairchild foundation and DOE DE-FG 03-92-ER40701. AC thanks the KoalaKavli Institute for Theoretical Physics (supported by NSF PHY99-07949) for hospitality where this work was initiated.
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Department of Energy (DOE)DE-FG 03-92-ER40701
Subject Keywords:galaxies: clusters: general, galaxies: distances and redshifts, cosmological parameters, cosmology: theory, dark matter, large-scale structure of Universe
Issue or Number:1
Record Number:CaltechAUTHORS:20180509-072535049
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Official Citation:Asantha Cooray; Non-linear galaxy power spectrum and cosmological parameters, Monthly Notices of the Royal Astronomical Society, Volume 348, Issue 1, 11 February 2004, Pages 250–260,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86300
Deposited By: Tony Diaz
Deposited On:09 May 2018 17:02
Last Modified:15 Nov 2021 20:37

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