论文标题
在不同初始旋转和方向配置下的两个相互作用星系的星系形态和合并时间的研究
Study of galaxy morphology and merging time of two interacting galaxies under different initial rotation and orientation configurations
论文作者
论文摘要
使用GADGET-2 N体制代码，我们研究了由于两个相互作用的星系（对于相同类型，不同的尺寸和质量，$ 1：1 $和$ 1：10 $比率质量），因此对星系形态和合并时间进行了合并。这是针对这些星系的不同初始相对取向和旋转（相互作用模式）的方法，但具有相同的相对凸起分离和相同的相对初始速度。发现所得的星系形态类似于我们宇宙中观察到的许多星系，并且通常，比质量比1：1：1：1的二进制星系系统具有1:10质量比的二元星系系统具有更大的合并时间。这种差异是由于两种情况下互动过程中质量的演变不同。对于1:10质量比的情况，全球质量最大值位于末端演变，这意味着第二个星系会不断增加其质量。对于质量比1：1的案例，全球最大值位于$ t = 0.35 $ gy左右，导致合并时间的减少。
Using the GADGET-2 N-body code, we make a study of the galaxy morphology and merging time due to two interacting galaxies (for the same types and different sizes and masses, $1:1$ and $1:10$ ratio masses) merging due to gravity interaction. This is done for different initial relative orientation and rotation of these galaxies (modes of interaction) but with the same relative bulge separation and the same relative initial velocities. It was found that the resulting galaxy morphology resemble many of the observed galaxies in our Universe, and that, in general, a binary galaxy system with 1:10 mass ratio has larger merging time than a binary galaxy system with 1:1 mass ratio. This difference is due to the different evolution of the masses during the interaction in both cases. For the case with a 1:10 mass ratio, the global mass maximum is located at the end evolution, meaning that the second galaxy increases its mass constantly. For the case with mass ratio 1:1, the global maximum is located around $t=0.35$ Gy, causing a reduction of the merging time.
