在宇宙微波背景中没有各向异性的天图比官方天图更适合于WMAP的未校准时间顺序数据
Sky maps without anisotropies in the cosmic microwave background are a better fit to WMAP's uncalibrated time ordered data than the official sky maps
摘要:
对WMAP未校准的时间顺序数据(TOD)进行重新分析的目的有两个。第一项是重新评估在正式的WMAP宇宙微波背景(CMB)天空图中探测各向异性的可靠性。第二个是评估拟议标准在避免探测感兴趣信号时出现系统误差方面的性能。该标准是通过检验零假设,即未校准的TOD是一致的,没有各向异性时,WMAP的每小时校准参数允许变化。对于所有20个WMAP通道,没有各向异性的天空图比官方分析更适合TOD。最近发射的普朗克卫星应该有助于解决这个令人困惑的结果。
英文摘要:
The purpose of this reanalysis of the WMAP uncalibrated time ordered data (TOD) was two fold. The first was to reassess the reliability of the detection of the anisotropies in the official WMAP sky maps of the cosmic microwave background (CMB). The second was to assess the performance of a proposed criterion in avoiding systematic error in detecting a signal of interest. The criterion was implemented by testing the null hypothesis that the uncalibrated TOD was consistent with no anisotropies when WMAP's hourly calibration parameters were allowed to vary. It was shown independently for all 20 WMAP channels that sky maps with no anisotropies were a better fit to the TOD than those from the official analysis. The recently launched Planck satellite should help sort out this perplexing result.
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