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Generic description of CMB power spectra

Abstract : Taking advantage of the smoothness of CMB Cl power spectra, we derive a simple and model-independent parameterization of their measurement. It allows to describe completely the spectrum, ie. provide an estimate of the value and the error for any real l point at the percent level, down to low l multipole. We provide this parameterization for WMAP first year data and show that the spectrum is consistent with the smoothness hypothesis. We also show how such a parameterization allows to retrieve the Cl spectra from the measurement of Fourier rings on the sky (Gamma(m)) or from the angular correlation function (c(theta))
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Submitted on : Monday, November 29, 2004 - 2:38:23 PM
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Stéphane Plaszczynski, François Couchot. Generic description of CMB power spectra. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2003, pp.1-16. ⟨in2p3-00023361⟩



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