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arXiv 0907.3369math.STastro-ph.COmath.PRstat.TH
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Spin Needlets谱估计

Spin Needlets Spectral Estimation

Daryl Geller, Xiaohong Lan, Domenico Marinucci

摘要:

本文考虑球面上自旋纤维丛随机截面的统计分析。这些可以被认为是随机场,其在$S^2$中的每个点p处取位于该点$T_{p}S^2$处的切面中的曲线(例如椭圆)作为值,而不是像在普通情况下那样取数字。这种领域的分析是强烈的应用动机,例如宇宙学中的偏振实验。为了研究这样的场,Geller和Marinucci(2008)以及Geller等人(2008)最近引入了旋转针。我们考虑使用的自旋针自旋角功率谱估计,在存在噪声和丢失的观察,我们提供中心极限定理的结果,在高频的意义上,我们还讨论了测试的偏见和不对称性与渐近的理由。

英文摘要:

We consider the statistical analysis of random sections of a spin fibre bundle over the sphere. These may be thought of as random fields that at each point p in $S^2$ take as a value a curve (e.g. an ellipse) living in the tangent plane at that point $T_{p}S^2$, rather than a number as in ordinary situations. The analysis of such fields is strongly motivated by applications, for instance polarization experiments in Cosmology. To investigate such fields, spin needlets were recently introduced by Geller and Marinucci (2008) and Geller et al. (2008). We consider the use of spin needlets for spin angular power spectrum estimation, in the presence of noise and missing observations, and we provide Central Limit Theorem results, in the high frequency sense; we discuss also tests for bias and asymmetries with an asymptotic justification.

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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