从星系对看星系angular momentum的起源
Clues on the origin of galactic angular momentum from looking at galaxy pairs
摘要：
我们寻找成对的旋涡星系自旋之间的相关性，研究每个星系的角动量增益是否是由相同的潮汐场压印的潮汐力矩的结果。为了进行我们的研究，我们使用了斯隆数字巡天确定的星系对样本。我们发现一个弱的，但统计上显着的相关性之间的自旋幅度的邻近星系，但没有明确的方向之间的对齐。我们发现，事件，如与近邻的相互作用发挥了重要的作用，在最终配置的自旋值，因为我们发现这些相互作用往往会大大降低晚型星系的$λ$自旋参数的值，与邻居的形态的依赖。这意味着每一对的原始潮汐场可能是相似的，但在演化的后期阶段角动量的重新分布是重要的。
英文摘要：
We search for correlations between the spin in pairs of spiral galaxies, to study if the angular momentum gain for each galaxy was the result of tidal torques imprint by the same tidal field. To perform our study we made use of a sample of galaxy pairs identified using the Sloan Digital Sky Survey. We find a weak, but statistically significant correlation between the spin magnitude of neighbouring galaxies, but no clear alignment between their orientation. We show that events such as interactions with close neighbours play an important role in the value of the spin for the final configuration, as we find these interactions tend to reduce the value of the $λ$ spin parameter of late-type galaxies considerably, with dependence on the morphology of the neighbour. This implies that the original tidal field for each pair could have been similar, but the redistribution of angular momentum at later stages of evolution is important.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
