论文标题
窗户工件可能解释了最近声称检测到振荡宇宙比例因子的检测
Windowing Artifacts Likely Account for Recent Claimed Detection of Oscillating Cosmic Scale Factor
论文作者
论文摘要
使用IA型超新星的万神殿数据集，最近出版物（R20）报告了$ 〜2σ $检测到宇宙扩展历史中振荡的检测。将R20方法论用于模拟万神殿数据，我们确定这些振荡可能是由分析伪像引起的。 IA型超新星在红移空间中的间距不平坦，而R20的复杂分析方法施加了结构化的吞吐功能。当用R20处方分析时，大约$ 11 \％的人工$λ$ CDM数据集产生的振荡信号比实际的Pantheon数据更强。 R20进行的研究是一项完全值得的努力。但是，我们认为检测到的振荡不是归因于振荡的宇宙量表因子，而是数据处理的伪像。我们的结果强调了理解复杂数据分析可以引入的错误“信号”的重要性。
Using the Pantheon data set of Type Ia supernovae, a recent publication (R20 in this work) reports a $~2σ$ detection of oscillations in the expansion history of the universe. Applying the R20 methodology to simulated Pantheon data, we determine that these oscillations likely arise from analysis artifacts. The uneven spacing of Type Ia supernovae in redshift space and the complicated analysis method of R20 impose a structured throughput function. When analyzed with the R20 prescription, about $11\%$ of artificial $Λ$CDM data sets produce a stronger oscillatory signal than the actual Pantheon data. The study conducted by R20 is a wholly worthwhile endeavor. However, we believe that the detected oscillations are not due to an oscillating cosmic scale factor and are instead artifacts of the data processing. Our results underscore the importance of understanding the false `signals' that can be introduced by complicated data analyses.
