The spectral properties of inhomogeneities of the cosmic microwave background are considered. The inhomogeneity spectra are studied in the frequency range from 30 to 217 GHz according to multi-frequency maps of the Planck space mission with smoothing at different angular sizes. According to the thermodynamic temperature versus frequency relation, it is shown that the map at 70 GHz has a signal distribution that differs from the data at other frequencies depending on the smoothing window. At 70 GHz, there is a peak in the spectrum, most strongly manifested on maps without smoothing. In the inhomogeneity spectra represented by the frequency dependence of the flux density for data at high multipoles (ℓ > 200, θ < 30'), the signal behavior different from the low multipoles (ℓ < 200) was found, which demonstrates a monotonically growing spectrum with an increase in frequency from 30 to 217 GHz.

中文翻译：

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中，高多极背景信号峰值的光谱特性

考虑宇宙微波背景的不均匀性的光谱特性。根据普朗克空间飞行任务的多频图，在不同角度大小下进行平滑处理，研究了30至217 GHz频率范围内的不均匀频谱。根据热力学温度与频率的关系，可以看出，根据平滑窗口，在70 GHz处的映射具有与其他频率下的数据不同的信号分布。在70 GHz处，频谱中有一个峰值，在没有平滑的情况下最明显地出现在地图上。在高通量多极数据（pole> 200，θ <30'），发现信号行为不同于低多极（ℓ<200），这表明频谱从30 GHz增大到217 GHz，呈单调增长的频谱。