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Multi-frequency, high resolution, full sky measurements of the anisotropy in both temperature and polarisation of the cosmic microwave background radiation are the goals of the satellite missions MAP (NASA) and Planck (ESA). The ultimate…

Astrophysics · Physics 2007-05-23 K. M. Gorski , E. Hivon , B. D. Wandelt

We develop the pseudo-Cl method for reconstructing the Cosmic Microwave Background (CMB) temperature and polarization auto- and cross-power spectra, and estimate the pseudo-Cl covariance matrix for a realistic experiment on the cut sky. We…

Astrophysics · Physics 2009-11-10 M. L. Brown , P. G. Castro , A. N. Taylor

The lack of power anomaly is an intriguing feature at the largest angular scales of the CMB anisotropy temperature pattern, whose statistical significance is not strong enough to claim any new physics beyond the standard cosmological model.…

Cosmology and Nongalactic Astrophysics · Physics 2019-06-11 M. Billi , A. Gruppuso , N. Mandolesi , L. Moscardini , P. Natoli

The High Frequency Instrument of Planck will map the entire sky in the millimeter and sub-millimeter domain from 100 to 857 GHz with unprecedented sensitivity to polarization ($\Delta P/T_{\tiny cmb} \sim 4\cdot 10^{-6}$) at 100, 143, 217…

We assess the impact of non-ideal, continuously rotating half-wave plates (HWPs) on cosmic microwave background (CMB) polarization measurements targeting large angular scale signal. Such hardware solutions are used in or planned for…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-20 Ema Tsang-King-Sang , Josquin Errard , Simon Biquard , Pierre Chanial , Wassim Kabalan , Wuhyun Sohn , Radek Stompor

The statistical properties of a map of the primary fluctuations in the cosmic microwave background (CMB) may be specified to high accuracy by a few thousand power spectra measurements, provided the fluctuations are gaussian, yet the number…

Astrophysics · Physics 2009-11-07 Sujata Gupta , Alan F. Heavens

Quantum mechanical metric fluctuations during an early inflationary phase of the universe leave a characteristic imprint in the polarization of the cosmic microwave background (CMB). The amplitude of this signal depends on the energy scale…

We describe an assembly of numerical tools to model the output data of the Planck satellite. These start with the generation of a CMB sky in a chosen cosmology, add in various foreground sources, convolve the sky signal with arbitrary, even…

Astrophysics · Physics 2009-11-11 Martin Reinecke , Klaus Dolag , Reinhard Hell , Matthias Bartelmann , Torsten Ensslin

Following Kamionkowski (2008), a quadratic estimator of the rotation of the plane of polarization of the CMB is constructed. This statistic can estimate a spatially varying rotation angle. We use this estimator to quantify the prospects of…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-03 Amit P. S. Yadav , Rahul Biswas , Meng Su , Matias Zaldarriaga

We estimate Cosmic Microwave Background (CMB) polarisation power spectra, and temperature-polarisation cross-spectra, from the 9-year data of the Wilkinson Microwave Anisotropy Probe (WMAP). Foreground cleaning is implemented using minimum…

Cosmology and Nongalactic Astrophysics · Physics 2016-03-02 Soumen Basak , Jacques Delabrouille

The low quadrupole of the cosmic microwave background (CMB), measured by COBE and confirmed by WMAP, has generated much discussion recently. We point out that the well-known correlation between temperature and polarization anisotropies of…

Astrophysics · Physics 2009-06-15 Olivier Doré , Gilbert P. Holder , Abraham Loeb

Mild, unavoidable deviations from circular-symmetry of instrumental beams along with scan strategy can give rise to measurable Statistical Isotropy (SI) violation in Cosmic Microwave Background (CMB) experiments. If not accounted properly,…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-06 Nidhi Pant , Santanu Das , Aditya Rotti , Sanjit Mitra , Tarun Souradeep

We have developed a fast, accurate and generally applicable method for inferring the power spectrum and its uncertainties from maps of the cosmic microwave background (CMB) in the presence of inhomogeneous and correlated noise. For maps…

Astrophysics · Physics 2014-10-13 O. Doré , L. Knox , A. Peel

We consider the distribution of the non-Gaussian signal induced by weak lensing on the primary total intensity cosmic microwave background (CMB) anisotropies. Our study focuses on the three point statistics exploiting an harmonic analysis…

Astrophysics · Physics 2009-11-10 Fabio Giovi , Carlo Baccigalupi , Francesca Perrotta

We present a method for fast optimal estimation of the temperature angular power spectrum from observations of the cosmic microwave background. We employ a Hamiltonian Monte Carlo (HMC) sampler to obtain samples from the posterior…

Astrophysics · Physics 2009-11-13 J. F. Taylor , M. A. J. Ashdown , M. P. Hobson

Microwave Kinetic Inductance Devices (MKIDs) are poised to allow for massively and natively multiplexed photon detectors arrays and are a natural choice for the next-generation CMB-Stage 4 experiment which will require 105 detectors. In…

Instrumentation and Methods for Astrophysics · Physics 2019-09-06 Ritoban Basu Thakur , Jason Henning , Peter Stuart Barry , Erik Shirokoff , Qing Yang Tang

In this paper, we explore the power of the cosmic microwave background (CMB) polarization (E-mode) data to corroborate four potential anomalies in CMB temperature data: the lack of large angular-scale correlations, the alignment of the…

Cosmic birefringence (CB) is the rotation of the photons' linear polarisation plane during propagation. Such an effect is a tracer of parity-violating extensions of standard electromagnetism and would probe the existence of a new…

Cosmology and Nongalactic Astrophysics · Physics 2025-06-24 E. de la Hoz , P. Diego-Palazuelos , J. Errard , A. Gruppuso , B. Jost , R. M. Sullivan , M. Bortolami , Y. Chinone , L. T. Hergt , E. Komatsu , Y. Minami , I. Obata , D. Paoletti , D. Scott , P. Vielva , D. Adak , R. Akizawa , A. Anand , J. Aumont , C. Baccigalupi , A. J. Banday , R. B. Barreiro , N. Bartolo , S. Basak , A. Basyrov , M. Bersanelli , T. Brinckmann , F. Cacciotti , E. Calabrese , P. Campeti , E. Carinos , A. Carones , F. Carralot , F. J. Casas , M. Citran , L. Clermont , F. Columbro , G. Coppi , A. Coppolecchia , F. Cuttaia , P. de Bernardis , M. De Lucia , M. De Petris , S. Della Torre , E. Di Giorgi , H. K. Eriksen , E. Ferreira , F. Finelli , C. Franceschet , U. Fuskeland , G. Galloni , M. Galloway , M. Gerbino , M. Gervasi , R. T. Génova-Santos , T. Ghigna , S. Giardiello , C. Gimeno-Amo , E. Gjerløw , M. Hazumi , S. Henrot-Versillé , E. Hivon , H. Ishino , K. Kohri , L. Lamagna , M. Lattanzi , C. Leloup , M. Lembo , F. Levrier , M. López-Caniego , G. Luzzi , E. Martínez-González , S. Masi , S. Matarrese , S. Micheli , M. Migliaccio , M. Monelli , L. Montier , G. Morgante , R. Nagata , T. Namikawa , P. Natoli , A. Occhiuzzi , L. Pagano , A. Paiella , G. Pascual-Cisneros , V. Pavlidou , V. Pelgrims , F. Piacentini , G. Piccirilli , G. Polenta , L. Porcelli , N. Raffuzzi , M. Remazeilles , A. Ritacco , A. Rizzieri , J. A. Rubiño-Martín , M. Ruiz-Granda , Y. Sakurai , J. Sanghavi , M. Shiraishi , S. L. Stever , Y. Takase , K. Tassis , L. Terenzi , M. Tomasi , M. Tristram , L. Vacher , B. van Tent , D. Watts , I. K. Wehus , G. Weymann-Despres , B. Winter , E. J. Wollack , Y. Zhou

We present a method of subtracting the foreground contamination for the measurement of CMB polarization. We calculate the resultant errors on CMB polarization and temperature-polarization cross correlation power spectra for the high…

Astrophysics · Physics 2007-05-23 Simon Prunet , Shiv K. Sethi , Francois R. Bouchet

We use a simple model to investigate the effect of polarized Galactic foreground emission on the ability of planned CMB missions to detect and model CMB polarization. Emission from likely polarized sources (synchrotron and spinning dust)…

Astrophysics · Physics 2007-05-23 A. Kogut , G. Hinshaw