Fragmentation, multiplicity and massive star formation in filament hubs

细丝中心的碎片、多重性和大量恒星形成

• 批准号: 2784968
• 金额: --
• 依托单位: University of Manchester
• 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-2784968
• 关键词: Fragmentation; multiplicity; massive; star; formation

Massive stars have a profound influence upon their surroundings and the evolution of the galactic Interstellar Medium due to their radiation, momentum feedback and final death as supernovae. Binary interaction dominates the evolution of massive stars, but at present multiplicity is rarely taken into account when studying massive star formation. However, it is a crucial topic, as close companions alter massive stars evolutionary path via mass exchange, and their subsequent supernovae progenitors. Observations show that massive cores often contain multiple proto-stars and that cores are formed within networks of filaments gas in molecular clouds. Thus massive proto-stellar cores may be fed by clumpy streams of gas with variable angular momentum, making fragmentation increasingly likely.This project aims to rectify this by simulating massive and low mass cores formed within molecular cloud filament networks, to investigate their multiplicity and disc properties. We will use the MHD code Arepo with radiative transfer to simulate filamentary gas networks to investigate the fragmentation of the gas into stars. Does including the environment in which massive stars form increase their likelihood to be part of multiple star systems?

大质量恒星由于其辐射、动量反馈和最终的超新星死亡，对周围环境和银河系星际介质的演化产生了深远的影响。双星相互作用主导着大质量恒星的演化，但目前在研究大质量星星形成时很少考虑多重性。然而，这是一个至关重要的话题，因为亲密的同伴通过质量交换改变了大质量恒星的演化路径，以及它们随后的超新星祖先。观测表明，大质量的核心通常包含多颗原恒星，核心是在分子云中的丝状气体网络中形成的。因此，大质量的原恒星核心可能由具有可变角动量的气体团流供给，使得碎片化的可能性越来越大。本项目旨在通过模拟分子云细丝网络中形成的大质量和低质量核心来纠正这一点，以研究它们的多重性和盘属性。我们将使用带有辐射传输的MHD程序Arepo来模拟非定常气体网络，以研究气体分裂成恒星的过程。包括大质量恒星形成的环境是否会增加它们成为多星星系统一部分的可能性？