论文标题
在螺旋星系的自旋方向的大尺度分布中的多极对准
Multipole alignment in the large-scale distribution of spin direction of spiral galaxies
论文作者
论文摘要
先前的观察结果表明，星系的自旋方向的非随机分布远大于超级收集器的大小。在这里，我使用$ \ sim1.7 \ cdot10^5 $来自SDSS的螺旋星系，$ 3.3 \ cdot10^4 $螺旋星系中的螺旋星系分析了从地球观察到的螺旋星系的星系旋转模式的分布。该分析在SDS和PAN-Stars中表明，星系旋转方向的分布形成非随机模式，并且可以将其拟合到偶极子轴上，概率高于单纯的机会。这些观察结果与以前的发现一致，但基于更多数据和两个不同的望远镜。分析还表明，星系旋转方向的分布适合大规模的多极对齐，最适合四极对齐，概率为$ \sim6.9σ$，可以偶然地具有这样的分布。比较来自SDSS和PAN-Starrs的两个单独数据集，以使两个数据集中的星系具有相似的红移分布提供了几乎相同的四倍模式。
Previous observations have suggested non-random distribution of spin directions of galaxies at scales far larger than the size of a supercluster. Here I use $\sim1.7\cdot10^5$ spiral galaxies from SDSS and $3.3\cdot10^4$ spiral galaxies from Pan-STARRS to analyze the distribution of galaxy spin patterns of spiral galaxies as observed from Earth. The analysis shows in both SDSS and Pan-STARRS that the distribution of galaxy spin directions forms a non-random pattern, and can be fitted to a dipole axis in probability much higher than mere chance. These observations agree with previous findings, but are based on more data and two different telescopes. The analysis also shows that the distribution of galaxy spin directions fits a large-scale multipole alignment, with best fit to quadrupole alignment with probability of $\sim6.9σ$ to have such distribution by chance. Comparison of two separate datasets from SDSS and Pan-STARRS such that the galaxies in both datasets have similar redshift distribution provides nearly identical quadrupole patterns.
