通过WMAP和NVSS局部形态测度的相关性用可控小波探测暗能量
Probing dark energy with steerable wavelets through correlation of WMAP and NVSS local morphological measures
摘要：
使用当地的形态测量定义通过可操纵的小波分析的球体上，我们研究了三年的WMAP和NVSS数据的相关性引起的综合萨克斯-沃尔夫（ISW）效应。可操纵的小波构造从高斯的二阶导数允许一个定义三个局部形态的措施，即签署的强度，方向和伸长的局部特征。WMAP和NVSS数据之间的相关性的检测与这些形态的措施。最显著的检测是在局部特征的符号强度的相关性中获得的，显著性为99.9%。通过检查符号强度天空图，有可能第一次看到WMAP和NVSS数据之间的相关性。WMAP数据中的前景污染和仪器系统学被排除为所有重要相关检测的来源。我们的研究结果提供了新的见解的ISW效应，通过探索的形态学性质之间的相关性诱导的宇宙微波背景和宇宙的大尺度结构。考虑到目前对宇宙平坦性的限制，我们对ISW效应的探测再次为暗能量提供了直接和独立的证据。此外，这种新的形态学分析可能在未来被用来帮助我们更好地理解暗能量的本质。
英文摘要：
Using local morphological measures on the sphere defined through a steerable wavelet analysis, we examine the three-year WMAP and the NVSS data for correlation induced by the integrated Sachs-Wolfe (ISW) effect. The steerable wavelet constructed from the second derivative of a Gaussian allows one to define three local morphological measures, namely the signed-intensity, orientation and elongation of local features. Detections of correlation between the WMAP and NVSS data are made with each of these morphological measures. The most significant detection is obtained in the correlation of the signed-intensity of local features at a significance of 99.9%. By inspecting signed-intensity sky maps, it is possible for the first time to see the correlation between the WMAP and NVSS data by eye. Foreground contamination and instrumental systematics in the WMAP data are ruled out as the source of all significant detections of correlation. Our results provide new insight on the ISW effect by probing the morphological nature of the correlation induced between the cosmic microwave background and large scale structure of the Universe. Given the current constraints on the flatness of the Universe, our detection of the ISW effect again provides direct and independent evidence for dark energy. Moreover, this new morphological analysis may be used in future to help us to better understand the nature of dark energy.
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。
