从中红外活动星系核的计数推断我们的特殊运动及其与宇宙学原理的不一致性
Our Peculiar Motion Inferred from Number Counts of Mid Infra Red AGNs and the Discordance Seen with the Cosmological Principle
摘要：
宇宙微波背景辐射（CMBR）中的偶极各向异性产生了沿$l=264^\circ,b=48^\circ$的370 km/s的特殊速度矢量$^{-1}$。然而，其他一些偶极，例如，来自遥远活动银河核（AGN）大样本的数量计数、天空亮度或红移分布，产生的奇特速度值比CMBR的大很多倍，尽管令人惊讶的是，在所有情况下，方向都与CMBR偶极一致。在这里，我们确定我们的奇特的运动从样本的~0.28万活动星系核，从中红外活动星系核（MIRAGN）的样本，包括超过一百万的来源。由此，我们发现了一个奇特的速度，它是CMBR值的四倍多，尽管方向似乎在CMBR偶极子的$\sim 2σ$范围内。太阳特有速度的真实值应该是相同的，而与估算它的数据或技术无关。因此，这种不一致的偶极子振幅可能意味着对这些偶极子的解释，包括对CMBR的解释，实际上可能是别的东西。但是，观察到的事实是，在所有情况下，方向都是相同的，尽管是由不同的人使用不同的仪器和技术，使用不同的计算程序从完全独立的调查中获得的，但这可能表明这些偶极子不仅仅是由于一些系统学，否则为什么它们都指向同一个方向。相反，它可能暗示宇宙中的一个优选方向，意味着真正的各向异性，这将违反宇宙学原理，现代宇宙学的核心。
英文摘要：
The dipole anisotropy in the Cosmic Microwave Background Radiation (CMBR) has given a peculiar velocity vector 370 km s$^{-1}$ along $l=264^\circ,b=48^\circ$. However, some other dipoles, for instance, from the number counts, sky brightness or redshift distributions in large samples of distant Active Galactic Nuclei (AGNs), have yielded values of the peculiar velocity many times larger than that from the CMBR, though surprisingly, in all cases the directions agreed with the CMBR dipole. Here we determine our peculiar motion from a sample of ~0.28 million AGNs, selected from the Mid Infra Red Active Galactic Nuclei (MIRAGN) sample comprising more than a million sources. From this, we find a peculiar velocity, which is more than four times the CMBR value, although the direction seems to be within $\sim 2σ$ of the CMBR dipole. A genuine value of the solar peculiar velocity should be the same irrespective of the data or the technique employed to estimate it. Therefore, such discordant dipole amplitudes, might mean that the explanation for these dipoles, including that of the CMBR, might in fact be something else. But, the observed fact that the direction in all cases, is the same, though obtained from completely independent surveys using different instruments and techniques, by different sets of people employing different computing routines, might nonetheless indicate that these dipoles are not merely due to some systematics, otherwise why would they all be pointing along the same direction. It might instead suggest a preferred direction in the Universe, implying a genuine anisotropy, which would violate the Cosmological Principle, the core of the modern cosmology.
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