论文标题
对固有的CMB偶极子的首次限制以及我们使用多普勒和畸变的速度
First constraints on the intrinsic CMB dipole and our velocity with Doppler and aberration
论文作者
论文摘要
我们检验了以下假设：宇宙微波背景（CMB）偶极子（其最大的各向异性）是由于我们对哈勃流的特殊速度，通过独立测量多普勒和使用Planck 2018数据对CMB对CMB的差异作用。我们从强度转化为温度的转化中删除了虚假贡献，并得出了与CMB偶极子本身独立于温度和极化图以及SMICA和NILC组分分离方法的测量值。将这些新测量与偶极子一组相结合，我们获得了固有的CMB偶极子的第一限制。假设标准的偶极透镜贡献，我们可以对固有振幅提出上限：3.7 MK（95％CI）。我们估计太阳能系统的特殊速度而不假设固有的偶极贡献：$ v =（300^{+111} _ { - 93}）$ km/s $ km/s $（l，b）=（276 \ pm 33，51 \ pm 19） （296^{+111} _ { - 88}）$ km/s，$（l，b）=（280 \ pm 33，50 \ pm 20）^\ circ $ [nilc]，具有可忽略的系统贡献。这些值与偶极子的特殊速度假设一致。
We test the usual hypothesis that the Cosmic Microwave Background (CMB) dipole, its largest anisotropy, is due to our peculiar velocity with respect to the Hubble flow by measuring independently the Doppler and aberration effects on the CMB using Planck 2018 data. We remove the spurious contributions from the conversion of intensity into temperature and arrive at measurements which are independent from the CMB dipole itself for both temperature and polarization maps and both SMICA and NILC component-separation methods. Combining these new measurements with the dipole one we get the first constraints on the intrinsic CMB dipole. Assuming a standard dipolar lensing contribution we can put an upper limit on the intrinsic amplitude: 3.7 mK (95% CI). We estimate the peculiar velocity of the solar system without assuming a negligible intrinsic dipole contribution: $v = (300^{+111}_{-93})$ km/s with $(l,b) = (276 \pm 33, 51 \pm 19)^\circ$ [SMICA], and $v = (296^{+111}_{-88})$ km/s with $(l,b) = (280 \pm 33, 50 \pm 20)^\circ$ [NILC] with negligible systematic contributions. These values are consistent with the peculiar velocity hypothesis of the dipole.
