The origin of bars in simulations of Milky-Way like galaxies

类银河系模拟中条形的起源

• 批准号: 2755529
• 金额: --
• 依托单位: Liverpool John Moores University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2755529
• 关键词: origin; bars; simulations; Milky; Way

Recent observations from ESA's Gaia mission and others have revolutionised how we see the Milky Way, garnering several exciting discoveries including an incredibly complex and rich "out-of-equilibrium" dynamical structure. This structure has been shaped by a wide range of dynamical phenomena, such as the galactic bar, spiral arms, and mergers. Unravelling the formation and evolution of this structure is a major goal of modern galactic astrophysics.The main aim of this project will be to unravel the connection between the galactic bar and the merger history of the Milky Way: did the bar form from the internal secular evolution of the disc, or was bar formation triggered by the merger with Gaia-Enceladus? The project will use a large suite of zoom simulations to explore the connection between mergers and bar formation, and determine if those formation channels leave different signatures in terms of bar properties (orbital structure and stellar populations) which could be compared with observations.

ESA的Gaia任务和其他人最近的观察结果彻底改变了我们如何看待银河系，获得了一些令人兴奋的发现，包括令人难以置信的复杂和丰富的“异常平衡”的动力结构。这种结构已经由多种动态现象（例如银河条，螺旋臂和合并）塑造。阐明这种结构的形成和演变是现代银河天体物理学的主要目标。该项目的主要目的是揭示银河条与银河系的合并历史之间的联系：棒形成碟片的内部世俗进化，还是与Gaia-Enceladus合并触发了条形？该项目将使用大量的缩放模拟来探索合并和棒形成之间的联系，并确定这些地层通道是否在栏属性（轨道结构和恒星种群）方面留下了不同的签名，可以将其与观察值进行比较。