CMB Anisotropies Interpolation
نویسندگان
چکیده
We consider the problem of the interpolation of irregularly spaced spatial data, applied to observation of Cosmic Microwave Background (CMB) anisotropies. The well-known interpolation methods and kriging are compared to the binning method which serves as a reference approach. We analyse kriging versus binning results for different resolutions and noise level in the original data. Most of the time, kriging outperforms the other methods for producing a regularly gridded, minimum variance CMB map.
منابع مشابه
Primordial magnetic fields and CMB anisotropies
Possible signatures of primordial magnetic fields on the Cosmic Microwave Background (CMB) temperature and polarization anisotropies are reviewed. The signals that could be searched for include excess temperature anisotropies particularly at small angular scales below the Silk damping scale, B-mode polarization, and non-Gaussian statistics. A field at a few nG level produces temperature anisotr...
متن کاملSeparating the kinetic SZ effect from primary CMB fluctuations
In the present work, we propose a new method aiming at extracting the kinetic Sunyaev-Zel’dovich (KSZ) temperature fluctuations embedded in the primary anisotropies of the cosmic microwave background (CMB). We base our study on simulated maps without noise and we consider very simple and minimal assumptions. Our method essentially takes benefit from the spatial correlation between KSZ and the C...
متن کاملBraneworld tensor anisotropies in the CMB
Cosmic microwave background (CMB) observations provide in principle a high-precision test of models which are motivated by M theory. We set out the framework of a program to compute the tensor anisotropies in the CMB that are generated in braneworld models. In the simplest approximation, we show the braneworld imprint as a correction to the power spectra for standard temperature and polarizatio...
متن کاملProceedings : Evolution of Large Scale Structure { Garching , August 1998 THEORETICAL VIEW OF ANISOTROPIES OF COS - MIC MICROWAVE
Cosmic Microwave Background (CMB) anisotropies have been recognized as one of the most important observational quantities to understand the early stage of our universe. In this paper, recent development of theoretical works on CMB anisotropies are summarized and it is shown that temperature uctuations of CMB contain rich information, i.e., cosmological parameters, geometry of the universe, init...
متن کاملSky maps without anisotropies in the cosmic microwave background are a better fit to WMAP’s uncalibrated time-ordered data than the official sky maps
The purpose of this reanalysis of the WMAP uncalibrated time-ordered data (TOD) is twofold. The first is to reassess the reliability of the detection of the anisotropies in the official WMAP sky maps of the cosmic microwave background (CMB). The second is to assess the performance of a proposed criterion in avoiding systematic errors in detecting a signal of interest. The criterion is implement...
متن کامل