论文标题
酒吧可以侵蚀cuspy光晕吗？
Can Bars Erode Cuspy Halos ?
论文作者
论文摘要
LAMBDA CDM宇宙学模型是核心库斯普问题的主要且广为人知的小规模问题之一。在这项研究中，我们研究了是否可以使用律师条约量解决此问题。我们看到，所有初始条在我们的仿真中都薄（B/A $ <$ 0.3），并且在高分辨率模拟中，栏变得更厚（B/A $> 0.3美元）。通过增加分辨率，我们的意思是大量的磁盘颗粒。高分辨率模拟中的较厚条形杆将较小的角动量转移到光环中。因此，我们发现，在高分辨率模拟中，要去除内部暗物质尖尾左右，这需要大约7 Gyr，这在星系进化时尺度上太长了。从物理上讲，原因是随着分辨率的增加，钢筋扣紧速度更快，更早。
One of the major and widely known small scale problem with the Lambda CDM model of cosmology is the core-cusp problem. In this study we investigate whether this problem can be resolved using bar instabilities. We see that all the initial bars are thin (b/a $<$ 0.3) in our simulations and the bar becomes thick (b/a $>$ 0.3$) faster in the high resolution simulations. By increasing the resolution, we mean a larger number of disk particles. The thicker bars in the high resolution simulations transfer less angular momentum to the halo. Hence, we find that in the high resolution simulations it takes around 7 Gyr for the bar to remove inner dark matter cusp which is too long to be meaningful in galaxy evolution timescales. Physically, the reason is that as the resolution increases, the bar buckles faster and becomes thicker much earlier on.
