Constraining the Milky Way assembly history with Galactic Archaeology
Constraining the Milky Way assembly history with Galactic Archaeology
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DOI：
10.1002/asna.201612366
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
I. Minchev
中科院分区：
文献类型：
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作者：
I. Minchev
银河考古学的目的是从银河系目前的运动学和化学状态恢复演化历史。由于恒星远离其诞生地，仅当前的动态信息不足以完成这项任务。另一方面，恒星大气的化学成分在恒星的整个生命周期中都得到了很大程度的保留，并且与准确的年龄一起可以用来恢复目前在同一银河半径处发现的恒星的诞生地。除了具有精确的 6D 运动学和化学丰度测量的大型恒星样本之外，这还需要考虑动力学和化学演化的详细建模。重要的第一步是了解银河系中可能发生的各种动力学过程，包括内部（棒状和螺旋结构）和外部（坠落卫星）因素的微扰效应。我们在这里讨论（1）如何通过银河系棒、螺旋结构和合并卫星对局部和全局盘相空间的影响来约束它们，（2）多种模式对盘动力学的影响，以及（3）径向迁移和合并扰动对于银河厚盘形成的重要性。最后，我们讨论银河系化学动力学模型的构建并与观测相关。
The aim of Galactic Archaeology is to recover the evolutionary history of the Milky Way from its present day kinematical and chemical state. Because stars move away from their birth sites, the current dynamical information alone is not sufficient for this task. The chemical composition of stellar atmospheres, on the other hand, is largely preserved over the stellar lifetime and, together with accurate ages, can be used to recover the birthplaces of stars currently found at the same Galactic radius. In addition to the availability of large stellar samples with accurate 6D kinematics and chemical abundance measurements, this requires detailed modeling with both dynamical and chemical evolution taken into account. An important first step is to understand the variety of dynamical processes that can take place in the Milky Way, including the perturbative effects of both internal (bar and spiral structure) and external (infalling satellites) agents. We discuss here (1) how to constrain the Galactic bar, spiral structure, and merging satellites by their effect on the local and global disc phase-space, (2) the effect of multiple patterns on the disc dynamics, and (3) the importance of radial migration and merger perturbations for the formation of the Galactic thick disc. Finally, we discuss the construction of Milky Way chemo-dynamical models and relate to observations.