论文标题
通过CSST光度测量探测宇宙原理
Probing the Cosmological Principle with the CSST Photometric Survey
论文作者
论文摘要
宇宙学原理指出，我们的宇宙在统计学上是均匀的，并且在大规模上是各向同性的。但是，由于太阳系的相对运动，可以在星系的分布中检测到附加的运动偶极子，这应该与在宇宙微波背景温度中观察到的偶极子一致。在本文中，我们预测了中国空间站望远镜光度调查的模拟数量图以重建运动学偶极子。 Using the whole photometric mock data, we obtain a positive evidence for the dipole signal detection at 3 sigma confidence level, and the significance would be increased to 4 sigma when we only use the high-redshift samples with z = 1.8 to 4. This result can provide a good consistency check between the kinematic dipoles measured in the CMB and that from the large scale structure, which can help us to verify the basic cosmological principle.
The cosmological principle states that our Universe is statistically homogeneous and isotropic at large scales. However, due to the relative motion of the Solar System, an additional kinematic dipole can be detected in the distribution of galaxies, which should be consistent with the dipole observed in the cosmic microwave background temperature. In this paper, we forecast the mock number count maps from the China Space Station Telescope photometric survey to reconstruct the kinematic dipole. Using the whole photometric mock data, we obtain a positive evidence for the dipole signal detection at 3 sigma confidence level, and the significance would be increased to 4 sigma when we only use the high-redshift samples with z = 1.8 to 4. This result can provide a good consistency check between the kinematic dipoles measured in the CMB and that from the large scale structure, which can help us to verify the basic cosmological principle.
