普朗克中间结果。LVI。通过热Sunyaev-Zeldovich效应的调制检测CMB偶极子：Eppur si muove II
Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II
摘要：
在宇宙微波背景（CMB）中，最大的温度各向异性是偶极子，三十多年来，特别是利用普朗克卫星，对偶极子的测量精度不断提高。偶极子的最简单解释是，它是由于我们相对于宇宙微波背景的静止坐标系的运动。由于目前的CMB实验推断温度各向异性的角强度变化，偶极子调制的温度各向异性与热Sunyaev-Zeldovich（tSZ）效应相同的频率依赖性。我们提出了第一个，显着的，检测到这个信号的tSZ地图，并发现它是一致的CMB偶极子的直接测量，正如预期的那样。该信号在tSZ图中贡献功率，该图以四极模式调制，并且我们估计其对tSZ双谱的贡献，注意到其在相关尺度上对双谱的噪声贡献可忽略不计。
英文摘要：
The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole, which has been measured with increasing accuracy for more than three decades, particularly with the Planck satellite. The simplest interpretation of the dipole is that it is due to our motion with respect to the rest frame of the CMB. Since current CMB experiments infer temperature anisotropies from angular intensity variations, the dipole modulates the temperature anisotropies with the same frequency dependence as the thermal Sunyaev-Zeldovich (tSZ) effect. We present the first, and significant, detection of this signal in the tSZ maps and find that it is consistent with direct measurements of the CMB dipole, as expected. The signal contributes power in the tSZ maps, which is modulated in a quadrupolar pattern, and we estimate its contribution to the tSZ bispectrum, noting that it contributes negligible noise to the bispectrum at relevant scales.
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