论文标题
来自四个望远镜的$ \ sim10^6 $螺旋星系的分析显示了银河系旋转方向的大规模不对称模式
Analysis of $\sim10^6$ spiral galaxies from four telescopes shows large-scale patterns of asymmetry in galaxy spin directions
论文作者
论文摘要
收集前所未有的天文数据的能力使研究的科学问题能够在预言时代进行研究。这项研究使用了四个不同机器人望远镜收集的大型数据集来介绍螺旋星系旋转方向的大规模分布。除了哈勃太空望远镜从太空获取的数据外，这些数据集涵盖了北半球和南半球。数据是通过完全对称算法自动注释的，并通过长期劳动密集型过程手动，导致数据集的近10^6 $星系。数据显示了自旋方向的不对称分布的可能模式，并且不同望远镜之间的模式一致。轮廓在使用星系的自动或手动注释时也同意，显示出非常相似的大规模模式。将所有望远镜的所有数据结合在一起，可以从星系数量和足迹大小上对同类数据进行最全面的分析。结果表明，在所有望远镜中都一致。本研究中使用的仪器是DECAM，HST，SDSS和PAN-Starrs。本文还讨论了可能的偏见来源，并分析了显示不同结果的先前工作的设计。需要进一步的研究来了解和验证这些初步观察。
The ability to collect unprecedented amounts of astronomical data has enabled the studying scientific questions that were impractical to study in the pre-information era. This study uses large datasets collected by four different robotic telescopes to profile the large-scale distribution of the spin directions of spiral galaxies. These datasets cover the Northern and Southern hemispheres, in addition to data acquired from space by the Hubble Space Telescope. The data were annotated automatically by a fully symmetric algorithm, as well as manually through a long labor-intensive process, leading to a dataset of nearly $10^6$ galaxies. The data shows possible patterns of asymmetric distribution of the spin directions, and the patterns agree between the different telescopes. The profiles also agree when using automatic or manual annotation of the galaxies, showing very similar large-scale patterns. Combining all data from all telescopes allows the most comprehensive analysis of its kind to date in terms of both the number of galaxies and the footprint size. The results show a statistically significant profile that is consistent across all telescopes. The instruments used in this study are DECam, HST, SDSS, and Pan-STARRS. The paper also discusses possible sources of bias, and analyzes the design of previous work that showed different results. Further research will be required to understand and validate these preliminary observations.
