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High Redshift Star Formation under Fuzzy Dark Matter Conditions

模糊暗物质条件下的高红移恒星形成

基本信息

批准号：
2605459
负责人：
金额：
--
依托单位：
University of Cambridge
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-2605459
关键词：
Redshift Star Formation under Fuzzy

项目摘要

Fuzzy Dark Matter (FDM) has been proposed as a potential alternative to the Cold Dark Matter (CDM) paradigm and has gained a lot of recent attention due to its ability to solve many observational problems with CDM (cusp-core problem, missing satellites problem, etc) . We wish to carry out some of the first zoom in simulations of FDM to examine the effects of FDM on star formation and fragmentation in the primordial star forming gas, and thereby investigate how the first stars formed under FDM conditions and how the unique properties of FDM affect this process when compared to the current CDM paradigm. We intend to use the cosmological hydrodynamics code AREPO to conduct these simulations. Long term, this would then be done with a view to linking our findings to potential observables that could distinguish FDM such as the 21-cm global signal and power spectrum, which are affected by the nature, distribution, and initial mass function of the earliest stars. Additionally, preliminary work looked at the effects of FDM on large scales suggested that these early stars formed in filamentary structures as opposed to halos as is expected to be the case CDM and so the more detailed work we intend to conduct may confirm this finding and provide a direct observational signature of FDM if new telescopes such as JWST find early stars forming in filaments rather than in halos.

模糊暗物质（FDM）被认为是冷暗物质（CDM）范式的一种潜在替代方案，并因其能够解决CDM中的许多观测问题（尖核问题、卫星丢失问题等）而受到广泛关注。我们希望进行一些第一次放大的FDM模拟研究FDM对星星的形成和分裂的原始星星形成气体的影响，从而研究如何在FDM条件下形成的第一颗恒星，以及FDM的独特性质如何影响这一过程时，目前的CDM范式相比。我们打算使用宇宙流体动力学代码AREPO进行这些模拟。从长远来看，这将是为了将我们的发现与可能区分FDM的潜在观测值联系起来，例如21厘米全球信号和功率谱，这些信号和功率谱受到最早恒星的性质，分布和初始质量函数的影响。此外，初步研究FDM对大尺度的影响表明，这些早期恒星形成于丝状结构中，而不是像CDM那样形成晕，因此我们打算进行的更详细的工作可能会证实这一发现，并提供FDM的直接观测特征，如果JWST等新望远镜发现早期恒星形成于丝状结构而不是晕中。