暗物质晕与盘星系棒的演化：无碰撞模型的再研究
Dark Matter Halos and Evolution of Bars in Disk Galaxies: Collisionless Models Revisited
摘要：
我们构建和发展家庭的恒星盘嵌入在生活DM晕的稳态模型，以研究酒吧的演变的动力学和长期阶段。这些模型进行了测试，对那些发表在文献中，以扩展它们，包括气体成分的后续文件。我们感兴趣的是在盘晕系统的角动量（J）重新分配。我们证实了以前的结果和量化的双重作用，DM晕在酒吧的演变：更集中的晕稀释的动力学过程，如自发酒吧不稳定性和垂直屈曲不稳定性，并减缓J传输，同时促进它在长期阶段。在共转半径（Rcr）内，只要Rcr保持在圆盘内，圆盘J几乎保持不变-这表明由于Rcr向外运动而导致的新鲜J的流入正在补偿外部圆盘和晕的J损失。这是可行的，只要棒减速主导Rcr内J的损失。我们发现，在某些模型中，当Rcr位于磁盘外部时，条形图案速度会在很长一段时间内停滞。这种现象出现的同时，几乎没有J之间的磁盘和晕转移。此外，我们确认，恒星酒吧一般显示共转酒吧的大小比在1-1.4的范围内，但只有在第一次屈曲和Rcr离开磁盘之间的时间。共转盘的大小比出现了一个重要的动态之间的各个阶段的酒吧盘演化。最后，我们分析了一些相关性的基本参数之间的禁止磁盘和晕，一些已经在文献中报道，一些新的。
英文摘要：
We construct and evolve families of steady-state models of stellar disks embedded in live DM halos, in order to study the dynamical and secular phases of bar evolution. These models are tested against those published in the literature in order to extend them and include the gaseous component in the follow up paper. We are interested in the angular momentum (J) redistribution in the disk-halo system. We confirm the previous results and quantify for the first time the dual role that the DM halos play in the bar evolution: more centrally concentrated halos dilute the dynamical processes, such as spontaneous bar instability and vertical buckling instability, and slowdown the J transfer, while facilitating it in the secular phase. Within the corotation radius (Rcr), the disk J remains nearly constant, as long as Rcr stays within the disk -- a sign that the lost J to the outer disk and the halo is being compensated by an influx of fresh J due to the outward motion of Rcr. This is feasible as long as the bar slowdown dominates the loss of J inside Rcr. We find that in some models the bar pattern speed stalls for prolonged time periods when Rcr is located outside the disk. This phenomenon appears concurrent with the near absence of J transfer between the disk and the halo. Furthermore, we confirm that stellar bars generally display the corotation to bar size ratios in the range of ~1-1.4, but only between the times of the first buckling and Rcr leaving the disk. The corotation-to-disk size ratio emerges as an important dynamic discriminator between various stages of barred disk evolution. Finally, we analyze a number of correlations between the basic parameters of a barred disk and a halo, some already reported in the literature and some new.
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。
