星系团中星系的拖曳引力力矩：径向小尺度排列效应
Drag-Gravity torques on galaxies in clusters: radial small-scale alignment effects
摘要：
我们计算星系团中的星系由于重力和动力学摩擦力的扭矩，以研究可能的起源的小尺度对齐效果的结果与环境的相互作用。本文用一个PLE模型导出了星系位置角的运动方程。我们发现，弱的径向排列效应可以产生这种机制只涉及最大质量的星系。我们还介绍了依赖于我们的方程，以探索星系与星系团的长轴对齐的星系偏心率。我们发现，在高偏心率星系团的内部区域，大质量星系与星系团的主轴对齐占主导地位的径向的。这个机制可以解释观测到的最大质量星系与其主星系团主轴的对齐效应。我们的研究结果表明，动力学摩擦是一个可行的发电机，只有最大质量的星系团星系的对齐。对于观测到的正常星系的排列，必须探索其原始起源。
英文摘要：
We calculate the torque on galaxies in clusters due to gravity and to dynamical friction forces in order to study the possible origin of small-scale alignment effects as the result of interactions with their environment. The equation of motion for the position angle of a galaxy is derived by using a ple model. We find that weak radial alignment effects can be produced by this mechanism involving only the most massive galaxies. We also introduce a dependence on the cluster eccentricity to our equations in order to explore the alignment of galaxies with the cluster's major axis. We find that in the inner regions of high eccentricity clusters, alignments of massive galaxies with the cluster's major axis dominate over the radial ones. This mechanism could account for the observed alignment effects of the most massive galaxies with the major axis of their host cluster. Our results suggest that dynamical friction is a viable generator of alignment only for the most massive cluster galaxies. For the observed alignments of normal galaxies a primordial origin has to be explored.
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。
