A Cross-Correlation Analysis of WMAP and EGRET Data in Wavelet Space
A Cross-Correlation Analysis of WMAP and EGRET Data in Wavelet Space
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小波空间中WMAP与EGRET数据的互相关分析
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Shuang
中科院分区：
文献类型：
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作者：
Xin Liu;Shuang
我们使用球面小波方法将第一年的Wilkinson微波各向异性探测器(WMAP)数据与高能伽马射线实验望远镜(EGRET)的漫射伽马射线强度图进行了交叉关联。基于来自最保守的WMAP前景遮罩之外的区域的数据，在WMAP前景清理的W波段和Q波段地图中，在15°左右的尺度上检测到99.7%显著水平的相关性；与Tegmark清理的地图没有发现显著的相关性。探测到的关联最有可能来自银河系，因此可以帮助探测可能的银河系前景残留物的来源，并最终将它们从测量的微波天空图中删除。
We cross-correlate the first-year Wilkinson Microwave Anisotropy Probe (WMAP) data and the diffuse gamma-ray intensity maps from the Energetic Gamma-Ray Experiment Telescope (EGRET) using spherical-wavelet approaches. Correlations at the 99.7% significance level have been detected, at scales around 15° in the WMAP foreground-cleaned W-band and Q-band maps, based on data from regions that are outside the most conservative WMAP foreground mask; no significant correlation is found with the Tegmark cleaned map. The detected correlation is most likely of Galactic origin and thus can help probe the origins of possible Galactic foreground residuals and ultimately remove them from measured microwave sky maps.