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arXiv 1002.0457astro-ph.COastro-ph.GA
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准备CMB PLANCK数据分析,估计银河系偏振发射造成的污染

Preparation to the CMB PLANCK data analysis, estimation of the contamination due to the galactic polarized emissions

L. Fauvet, J. F. Macias-Perez

摘要:

本文的工作是为普朗克卫星资料的分析做准备。普朗克卫星是欧空局的一项任务,于2009年5月14日发射,致力于测量宇宙微波背景(CMB)的温度和偏振。弥漫银河偏振辐射的存在干扰了CMB各向异性的测量,特别是在偏振。因此,需要精确了解这些排放,以获得普朗克所需的精度水平。在这种情况下,我们已经开发并实现了一个相干的3D模型的两个主要的偏振银河系的排放:同步加速器和热尘埃。我们已经比较了这些模型与现有的数据:23 GHz波段的WMAP数据,353 GHz Archeops数据和408 MHz的全天空连续调查。我们将这些模型外推到宇宙微波背景辐射占主导地位的频率,并且我们能够估计极化前景发射对普朗克测量的极化宇宙微波背景辐射的贡献。

英文摘要:

This work is point of the preparation to the analysis of the PLANCK satellite data. The PLANCK satellite is an ESA mission which has been launched the 14th of may 2009 and is dedicaced to the measurement of the Cosmic Microwave Background (CMB) in temperature and polarization. The presence of diffuse Galactic polarized emissions disturb the measurement of the CMB anisotropies, in particular in polarization. Therefore a precise knowledge of these emissions is needed to obtain the level of accuracy required for PLANCK. In this context, we have developed and implemented a coherent 3D model of the two mains polarized Galactic emissions : synchrotron and thermal dust. We have compared these models to preexisting data: the 23 GHz band of the WMAP data, the 353 GHz Archeops data and the 408 MHz all-sky continuum survey. We extrapolate these models to the frequencies where the CMB dominates and we are able to estimate the contribution of polarized foreground emissions to the polarized CMB emission measured with PLANCK.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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