Статья

SEVEN-YEAR <i>WILKINSON MICROWAVE ANISOTROPY PROBE</i> ( <i>WMAP</i> ) OBSERVATIONS: SKY MAPS, SYSTEMATIC ERRORS, AND BASIC RESULTS

N. JarosikDepartment of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544-0708, USAC. L. BennettDepartment of Physics & Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USAJ. DunkleyDepartment of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, UKB. GoldDepartment of Physics & Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USAM. R. GreasonADNET Systems, Inc., 7515 Mission Dr., Suite A100 Lanham, MD 20706, USAM. HalpernDepartment of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, CanadaR. S. HillADNET Systems, Inc., 7515 Mission Dr., Suite A100 Lanham, MD 20706, USAG. HinshawCode 665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USAA. KogutCode 665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USAE. KomatsuDepartment of Astronomy, University of Texas, Austin, 2511 Speedway, RLM 15.306, Austin, TX 78712, USAD. LarsonDepartment of Physics & Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USAM. LimonColumbia Astrophysics Laboratory, 550 West 120th Street, Mail Code 5247, New York, NY 10027-6902, USAS. S. MeyerDepartments of Astrophysics and Physics, KICP and EFI, University of Chicago, Chicago, IL 60637, USAM. R. NoltaCanadian Institute for Theoretical Astrophysics, 60 St. George Street, University of Toronto, Toronto, ON M5S 3H8, CanadaN. OdegardADNET Systems, Inc., 7515 Mission Dr., Suite A100 Lanham, MD 20706, USAL. PageDepartment of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544-0708, USAK. M. SmithDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544-1001, USAD. N. SpergelDepartment of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544-1001, USAG. S. TuckerDepartment of Physics, Brown University, 182 Hope St., Providence, RI 02912-1843, USAJ. L. WeilandADNET Systems, Inc., 7515 Mission Dr., Suite A100 Lanham, MD 20706, USAE. WollackCode 665, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USAE. L. Wright

2011en

ABI

Аннотация

(Abridged) New full sky temperature and polarization maps based on seven years of data from WMAP are presented. The new results are consistent with previous results, but have improved due to reduced noise from the additional integration time, improved knowledge of the instrument performance, and improved data analysis procedures. The improvements are described in detail. The seven year data set is well fit by a minimal six-parameter flat Lambda-CDM model. The parameters for this model, using the WMAP data in conjunction with baryon acoustic oscillation data from the Sloan Digital Sky Survey and priors on H_0 from Hubble Space Telescope observations, are: Omega_bh^2 = 0.02260 +-0.00053, Omega_ch^2 = 0.1123 +-0.0035, Omega_Lambda = 0.728 +0.015 -0.016, n_s = 0.963 +-0.012, tau = 0.087 +-0.014 and sigma_8 = 0.809 +-0.024 (68 % CL uncertainties). The temperature power spectrum signal-to-noise ratio per multipole is greater that unity for multipoles < 919, allowing a robust measurement of the third acoustic peak. This measurement results in improved constraints on the matter density, Omega_mh^2 = 0.1334 +0.0056 -0.0055, and the epoch of matter- radiation equality, z_eq = 3196 +134 -133, using WMAP data alone. The new WMAP data, when combined with smaller angular scale microwave background anisotropy data, results in a 3 sigma detection of the abundance of primordial Helium, Y_He = 0.326 +-0.075.The power-law index of the primordial power spectrum is now determined to be n_s = 0.963 +-0.012, excluding the Harrison-Zel'dovich-Peebles spectrum by >3 sigma. These new WMAP measurements provide important tests of Big Bang cosmology.

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Идентификаторы

DOI: 10.1088/0067-0049/192/2/14

Цитирования и источники

Цитирований: 8Использованных источников: 0

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