Cosmological constraints from the SDSS luminous red galaxies
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Author
Tegmark, Max
Strauss, Michael A.
Weinberg, David H.
Blanton, Michael R.
Frieman, Joshua A.
Fukugita, Masataka
Gunn, James E.
Hamilton, Andrew J. S.
Knapp, Gillian R.
Nichol, Robert C.
Ostriker, Jeremiah P.
Padmanabhan, Nikhil
Percival, Will J.
Schlegel, David J.
Schneider, Donald P.
Scoccimarro, Roman
Seljak, Uros
Seo, Hee-Jong
Swanson, Molly
Szalay, Alexander S.
Vogeley, Michael S.
Yoo, Jaiyul
Zehavi, Idit
Abazajian, Kevork
Anderson, Scott F.
Annis, James
Bahcall, Neta A.
Bassett, Bruce
Berlind, Andreas
Brinkmann, Jon
Budavari, Tamás
Castander, Francisco
Connolly, Andrew
Csabai, Istvan
Doi, Mamoru
Gillespie, Bruce
Glazebrook, Karl
Hennessy, Gregory S.
Hogg, David W.
Ivezic, Zeljko
Jain, Bhuvnesh
Johnston, David
Kent, Stephen
Lamb, Donald Q.
Lee, Brian C.
Lin, Huan
Loveday, Jon
Lupton, Robert H.
Munn, Jeffrey A.
Pan, Kaike
Park, Changbom
Peoples, John
Pier, Jeffrey R.
Pope, Adrian
Richmond, Michael
Rockosi, Constance
Scranton, Ryan
Sheth, Ravi K.
Stebbins, Albert
Stoughton, Christopher
Szapudi, István
Tucker, Douglas L.
Berk, Daniel E. Vanden
Yanny, Brian
York, Donald G.
Note: Order does not necessarily reflect citation order of authors.
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https://doi.org/10.1103/physrevd.74.123507Metadata
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Tegmark, Max, Daniel J. Eisenstein, Michael A. Strauss, David H. Weinberg, Michael R. Blanton, Joshua A. Frieman, Masataka Fukugita, et al. 2006. “Cosmological Constraints from the SDSS Luminous Red Galaxies.” Physical Review D 74 (12) (December 11). doi:10.1103/physrevd.74.123507.Abstract
We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from the Wilkinson Microwave Anisotropy Probe (WMAP). We employ a matrix-based power spectrum estimation method using Pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 20 k-bands of both the clustering power and its anisotropy due to redshift-space distortions, with narrow and well-behaved window functions in the range 0.01h/Mpc < k < 0.2h/Mpc. Results from the LRG and main galaxy samples are consistent, with the former providing higher signal-to-noise. Our results are robust to omitting angular and radial density fluctuations and are consistent between different parts of the sky. They provide a striking confirmation of the predicted large-scale LCDM power spectrum.Combining only SDSS LRG and WMAP data places robust constraints on many cosmological parameters that complement prior analyses of multiple data sets. The LRGs provide independent cross-checks on Om and the baryon fraction in good agreement with WMAP. Within the context of flat LCDM models, our LRG measurements complement WMAP by sharpening the constraints on the matter density, the neutrino density and the tensor amplitude by about a factor of two, giving Omega_m=0.24+-0.02 (1 sigma), sum m_nu < 0.9 eV (95%) and r<0.3 (95%). Baryon oscillations are clearly detected and provide a robust measurement of the comoving distance to the median survey redshift z=0.35 independent of curvature and dark energy properties. Within the LCDM framework, our power spectrum measurement improves the evidence for spatial flatness, sharpening the curvature constraint Omega_tot=1.05+-0.05 from WMAP alone to Omega_tot=1.003+-0.010. Assuming Omega_tot=1, the equation of state parameter is constrained to w=-0.94+-0.09, indicating the potential for more ambitious future LRG measurements to provide precision tests of the nature of dark energy. All these constraints are essentially independent of scales k>0.1h/Mpc and associated nonlinear complications, yet agree well with more aggressive published analyses where nonlinear modeling is crucial.
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https://arxiv.org/abs/astro-ph/0608632Terms of Use
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