Disrupting and Dispersing Star Clusters

破坏和分散星团

• 批准号: 2646801
• 金额: --
• 依托单位: Keele University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2646801
• 关键词: Disrupting; Dispersing; Star; Clusters

Most stars are thought to form within groups or clusters of some sort. However, these clusters do not survive for long, with some unknown process disrupting them and dispersing their stellar content throughout the galaxy. Recent studies have shown that this dispersal can be both highly explosive and dramatically asymmetric, yet the mechanisms responsible are still unknown. Our ability to study these dispersing stellar systems has been limited in the past by a lack of kinematic data, but this is changing now thanks to data from the Gaia satellite and complementary multi-object spectrographs. WEAVE is the first next-generation multi-object spectrograph, capable of observing 1000 targets at once, and currently being installed on the William Herschel Telescope in the Canary Islands. Over the coming five years our WEAVE survey of young stars will generate one of the largest ever spectroscopic samples of young stars, allowing us to trace their distribution and study their 3D distribution and kinematics. This project will combine state-of-the-art Gaia data with spectroscopy from the new WEAVE multi-object spectrograph to study the kinematics of dispersing star clusters to understand the physical mechanisms responsible for their dramatic disruption. This PhD position is well-timed to get your hands on the first WEAVE data and join the team!

大多数恒星被认为是在某种群或星团内形成的。然而，这些星团并不能长期存在，一些未知的过程会破坏它们并将其恒星成分分散到整个银河系中。最近的研究表明，这种扩散可能具有高度爆炸性且极不对称，但其机制仍不清楚。过去，我们研究这些分散恒星系统的能力因缺乏运动学数据而受到限制，但由于盖亚卫星和互补的多目标摄谱仪的数据，这种情况现在正在改变。 WEAVE 是第一台下一代多目标摄谱仪，能够同时观测 1000 个目标，目前安装在加那利群岛的威廉·赫歇尔望远镜上。在未来五年中，我们对年轻恒星的 WEAVE 调查将产生有史以来最大的年轻恒星光谱样本之一，使我们能够追踪它们的分布并研究它们的 3D 分布和运动学。该项目将把最先进的盖亚数据与新型 WEAVE 多目标摄谱仪的光谱相结合，研究分散星团的运动学，以了解导致其剧烈破坏的物理机制。这个博士职位非常适合您获得第一个 WEAVE 数据并加入团队！