AI 中文总结
本研究通过对为Sgr A*供能的沃尔夫-拉叶星及双星IRS 16SW开展流体动力学模拟，探究Sgr A*周围冷结构的形成条件，为构建G-1-2-3复合体的现实模型奠定基础。
AI 中文摘要
Sgr A*周围冷结构的发现挑战了我们对其附近气体动力学和等离子体热力学状态的理解。本研究旨在约束这类结构的形成条件，即冷盘状结构与新近发现的G-1-2-3复合体。我们对观测到的为Sgr A*供能的沃尔夫-拉叶星开展流体动力学模拟，结果显示等离子体化学成分对介质性质的确定至关重要。我们证明，与观测约束相符的化学成分可形成冷盘，但无法复现观测到冷盘的全部性质，这或暗示其与另一结构存在相互作用。此外，我们给出将IRS 16SW作为碰撞风双星进行流体动力学建模的首批结果，这是构建G-1-2-3复合体形成的现实模型的第一步。
英文摘要
The discovery of cold structures around Sgr A* has challenged our understanding of the gas dynamics and thermodynamic state of the plasma in its vicinity. This work aims to constrain the conditions for the formation of such structures, namely the cold disc-like structure and the recently discovered G-1-2-3 complex. We conduct hydrodynamic simulations of the observed Wolf-Rayet stars feeding Sgr A*. Our simulations show that the plasma chemical composition is crucial for determining the medium properties. We demonstrate that the formation of a cold disc is possible for chemical compositions that are consistent with observational constraints. However, it is not possible to reproduce all the properties of the observed disc which might suggest the interaction with another structure. Additionally, we present our first results on the hydrodynamic modelling of IRS 16SW as a colliding-wind binary. This is the first step to develop a realistic model on the formation of the G-1-2-3 complex.
CommentsProceedings for the IAU Symposium 405: "Traversing the Galactic Center in Space and Time". 5 pages and 2 figures
