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Journal article
Cosmological Parameters from Eigenmode Analysis of Sloan Digital Sky Survey Galaxy Redshifts
The Astrophysical journal, v 607(2 I), pp 655-660
13 Jan 2004
Abstract
Astrophys.J.607:655-660,2004 We present estimates of cosmological parameters from the application of the
Karhunen-Loeve transform to the analysis of the 3D power spectrum of density
fluctuations using Sloan Digital Sky Survey galaxy redshifts. We use Omega_m*h
and f_b = Omega_b/Omega_m to describe the shape of the power spectrum, sigma8
for the (linearly extrapolated) normalization, and beta to parametrize linear
theory redshift space distortions. On scales k < 0.16 h/Mpc, our maximum
likelihood values are Omega_m*h = 0.264 +/-0.043, f_b = 0.286 +/- 0.065, sigma8
= 0.966 +/- 0.048, and beta = 0.45 +/- 0.12. When we take a prior on Omega_b
from WMAP, we find Omega_m*h = 0.207 +/- 0.030, which is in excellent agreement
with WMAP and 2dF. This indicates that we have reasonably measured the gross
shape of the power spectrum but we have difficulty breaking the degeneracy
between Omega_m*h and f_b because the baryon oscillations are not resolved in
the current spectroscopic survey window function.
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Details
- Title
- Cosmological Parameters from Eigenmode Analysis of Sloan Digital Sky Survey Galaxy Redshifts
- Creators
- SDSS Collaboration (Collaboration)Adrian C Pope - Johns Hopkins UniversityTakahiko Matsubara - Nagoya UniversityAlexander S Szalay - Johns Hopkins UniversityMichael R Blanton - New York UniversityDaniel J Eisenstein - Steward Health Care SystemJim Gray - Microsoft Bay Area Research Center, San Francisco, CA 94105Bhuvnesh Jain - University of PennsylvaniaNeta A Bahcall - Princeton UniversityJon Brinkmann - Apache CorporationTamas Budavari - Johns Hopkins UniversityAndrew J Connolly - University of PittsburghJoshua A Frieman - University of ChicagoJames E Gunn - Princeton UniversityDavid Johnston - University of ChicagoStephen M Kent - FermilabRobert H Lupton - Princeton UniversityAvery Meiksin - UK Astronomy Technology CentreRobert C Nichol - Carnegie Mellon UniversityDonald P Schneider - Pennsylvania State UniversityRyan Scranton - University of PittsburghMichael A Strauss - Princeton UniversityIstvan Szapudi - University of Hawaii SystemMax Tegmark - University of PennsylvaniaMichael S Vogeley - Drexel UniversityDavid H Weinberg - The Ohio State UniversityIdit Zehavi - University of Chicago
- Publication Details
- The Astrophysical journal, v 607(2 I), pp 655-660
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000221540100001
- Scopus ID
- 2-s2.0-3242684504
- Other Identifier
- 991019168912304721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics