论文标题
TNG300-1周围的旋转对齐
Spin alignment around TNG300-1 voids
论文作者
论文摘要
使用一种新的统计方法，我们研究了银河旋转相对于TNG-300模拟中鉴定的空隙中心的比对信号。我们在星系的不同样品中探索了该信号，与空隙中心，质量，自旋标准，局部密度和速度的距离改变了它们。我们发现，巨大，高自旋和低径向速度星系的强烈趋势（> 9 sigma）垂直于以0.9至1.4 void Radii对应的距离为中心的方向垂直于void中心方向对齐。此外，我们发现在这些细胞密度的环境中，局部密度与自旋比对的振幅无关，而最大的影响与以最低膨胀速率的那些质地更加紧密地与void的中心相称，与星系空隙中为中心的径向速度有关。我们的结果表明，在理解内在比对及其与大规模结构的关系方面的进一步分析可能会探测即将进行的大型调查（例如欧几里得和LSST）中弱透镜研究的关键。
Using a new statistical approach we study the alignment signal of galactic spins with respect to the center of voids identified in the TNG-300 simulation. We explore this signal in different samples of galaxies, varying their distance from the void center, mass, spin norm, local density, and velocity. We find a strong tendency (>9 sigma) of massive, high-spin, and low radial velocity galaxies to be aligned perpendicularly to the void-centric direction in a wide range of distances corresponding to 0.9 to 1.4 void radii. Furthermore, we find that in these subdense environments, local density is irrelevant in the amplitude of spin alignment, while the largest impact is associated to the galaxy void-centric radial velocity in the sense that those at the lowest expansion rate are more strongly aligned perpendicularly to the center of the void. Our results suggest that further analysis at understanding intrinsic alignments and their relation to large scale structures may probe key for weak lensing studies in upcoming large surveys such as Euclid and LSST.
