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Multi-Scale Morphological Analysis of SDSS DR5 Survey using the Metric Space Technique

机译:用度量标准进行sDss DR5测量的多尺度形态学分析   空间技术

摘要

Following novel development and adaptation of the Metric Space Technique(MST), a multi-scale morphological analysis of the Sloan Digital Sky Survey(SDSS) Data Release 5 (DR5) was performed. The technique was adapted to performa space-scale morphological analysis by filtering the galaxy pointdistributions with a smoothing Gaussian function, thus giving quantitativestructural information on all size scales between 5 and 250 Mpc. The analysiswas performed on a dozen slices of a volume of space containing many newlymeasured galaxies from the SDSS DR5 survey. Using the MST, observational datawere compared to galaxy samples taken from N-body simulations with current bestestimates of cosmological parameters and from random catalogs. By using themaximal ranking method among MST output functions we also develop a way toquantify the overall similarity of the observed samples with the simulatedsamples.
机译:随着度量空间技术(MST)的创新发展和改编,对斯隆数字天空测量(SDSS)数据发布5(DR5)进行了多尺度形态分析。该技术适用于通过使用平滑高斯函数过滤星系点分布来执行空间尺度形态分析,从而在5至250 Mpc之间的所有大小尺度上提供定量结构信息。该分析是对包含SDSS DR5调查中许多新近测得的星系的十二块空间进行的。使用MST,将观测数据与从N体模拟获得的具有当前最佳宇宙学参数估计值的星系样本以及从随机目录中获得的星系样本进行了比较。通过使用MST输出函数之间的最大排序方法,我们还开发了一种方法来量化观察到的样本与模拟样本的整体相似性。

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