|
|
|
|
LEADER |
04078 am a22005413u 4500 |
001 |
72320 |
042 |
|
|
|a dc
|
100 |
1 |
0 |
|a Reid, Beth A.
|e author
|
100 |
1 |
0 |
|a Massachusetts Institute of Technology. Department of Physics
|e contributor
|
100 |
1 |
0 |
|a Tegmark, Max
|e contributor
|
100 |
1 |
0 |
|a Tegmark, Max Erik
|e contributor
|
100 |
1 |
0 |
|a Eisenstein, Daniel J.
|e contributor
|
700 |
1 |
0 |
|a Percival, Will J.
|e author
|
700 |
1 |
0 |
|a Verde, Licia
|e author
|
700 |
1 |
0 |
|a Spergel, David N.
|e author
|
700 |
1 |
0 |
|a Skibba, Raman A.
|e author
|
700 |
1 |
0 |
|a Bahcall, Neta A.
|e author
|
700 |
1 |
0 |
|a Budavari, Tamas
|e author
|
700 |
1 |
0 |
|a Frieman, Joshua A.
|e author
|
700 |
1 |
0 |
|a Fukugita, Masataka
|e author
|
700 |
1 |
0 |
|a Gott, J. Richard
|e author
|
700 |
1 |
0 |
|a Gunn, James E.
|e author
|
700 |
1 |
0 |
|a Zeljko, Ivezic
|e author
|
700 |
1 |
0 |
|a Knapp, Gillian R.
|e author
|
700 |
1 |
0 |
|a Kron, Richard G.
|e author
|
700 |
1 |
0 |
|a Lupton, Robert H.
|e author
|
700 |
1 |
0 |
|a McKay, Timothy A.
|e author
|
700 |
1 |
0 |
|a Meiksin, Avery
|e author
|
700 |
1 |
0 |
|a Nichol, Robert C.
|e author
|
700 |
1 |
0 |
|a Pope, Adrian C.
|e author
|
700 |
1 |
0 |
|a Schlegel, David J.
|e author
|
700 |
1 |
0 |
|a Schneider, Donald P.
|e author
|
700 |
1 |
0 |
|a Stoughton, Chris
|e author
|
700 |
1 |
0 |
|a Strauss, Michael A.
|e author
|
700 |
1 |
0 |
|a Szalay, Alexander S.
|e author
|
700 |
1 |
0 |
|a Eisenstein, Daniel J.
|e author
|
700 |
1 |
0 |
|a Tegmark, Max Erik
|e author
|
700 |
1 |
0 |
|a Vogeley, Michael S.
|e author
|
700 |
1 |
0 |
|a Weinberg, David H.
|e author
|
700 |
1 |
0 |
|a York, Donald G.
|e author
|
700 |
1 |
0 |
|a Zehavi, Idit
|e author
|
245 |
0 |
0 |
|a Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies
|
260 |
|
|
|b Wiley-Blackwell Pubishers,
|c 2012-08-22T14:58:11Z.
|
856 |
|
|
|z Get fulltext
|u http://hdl.handle.net/1721.1/72320
|
520 |
|
|
|a We present the power spectrum of the reconstructed halo density field derived from a sample of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) Seventh Data Release (DR7). The halo power spectrum has a direct connection to the underlying dark matter power for k[greater than or equal to] 0.2 h Mpc[superscript −1], well into the quasi-linear regime. This enables us to use a factor of ∼8 more modes in the cosmological analysis than an analysis with k[subscript max]= 0.1 h Mpc[superscript −1], as was adopted in the SDSS team analysis of the DR4 LRG sample. The observed halo power spectrum for 0.02 < k < 0.2 h Mpc−1 is well fitted by our model: χ[superscript 2]= 39.6 for 40 degrees of freedom for the best-fitting Λ cold dark matter (ΛCDM) model. We find Omega[subscript m]h2(n[subscript s]/0.96)[superscript 1.2]= 0.141+[superscript 0.010][subscript −0.012] for a power-law primordial power spectrum with spectral index n[subscript s] and Omega[subscript b]h[superscript 2]= 0.022 65 fixed, consistent with cosmic microwave background measurements. The halo power spectrum also constrains the ratio of the comoving sound horizon at the baryon-drag epoch to an effective distance to z= 0.35: r[subscript s]/D[subscript V](0.35) = 0.1097[superscript +0.0039][subscript −0.0042]. Combining the halo power spectrum measurement with the Wilkinson Microwave Anisotropy Probe (WMAP) 5 year results, for the flat ΛCDM model we find Omega[subscript m]= 0.289 ± 0.019 and H[subscript 0]= 69.4 ± 1.6 km s−1 Mpc−1. Allowing for massive neutrinos in ΛCDM, we find ∑m[subscript v] <0.62 eV at the 95 per cent confidence level. If we instead consider the effective number of relativistic species N[subscript eff] as a free parameter, we find N[subscript eff]= 4.8[superscript +1.8][subscript −1.7]. Combining also with the Kowalski et al. supernova sample, we find Omega[subscript tot]= 1.011 ± 0.009 and w=−0.99 ± 0.11 for an open cosmology with constant dark energy equation of state w. The power spectrum and a module to calculate the likelihoods are publicly available at http://lambda.gsfc.nasa.gov/toolbox/lrgdr/.
|
546 |
|
|
|a en_US
|
655 |
7 |
|
|a Article
|
773 |
|
|
|t Monthly Notices of the Royal Astronomical Society
|