Constraining baryonic feedback with the FABLE hydrosimulations.

使用 FABLE 水模拟约束重子反馈。

• 批准号: 2751702
• 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: 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-2751702
• 关键词: Constraining; baryonic; feedback; FABLE; hydrosimulations.

I am studying baryonic feedback using both cosmological structure formation simulations and observational data. Improved understanding of this effect will allow future weak lensing surveys to make more powerful cosmological constraints, ultimately advancing our knowledge of the Universe's contents and expansion history. My current project is based on modifying the AGN feedback in the FABLE hydrodynamical simulations. I am interested in testing whether increasing the extremity of feedback with redshift, particularly around cosmic noon, can reconcile the current tension in cosmology between measurements of S8 by cosmic shear surveys and those by the Planck cosmic microwave background data. We are comparing the 'observables' of our modified runs, such as the galaxy stellar mass function and gas fractions, with data in order to test the feasibility of our models. I am also a member of the Dark Energy Survey. I will be performing a combined analysis of DES weak lensing and ACT kSZ data, in order to constrain baryonic feedback from an observational standpoint.

我正在研究重子反馈使用宇宙结构形成模拟和观测数据。对这种效应的进一步理解将使未来的弱透镜调查能够产生更强大的宇宙学约束，最终推进我们对宇宙内容和膨胀历史的了解。我目前的项目是基于修改活动星系核反馈的FABLE流体动力学模拟。我感兴趣的是测试是否增加极端的反馈与红移，特别是在宇宙中午，可以调和目前的紧张局势之间的宇宙学测量S8的宇宙剪切调查和普朗克宇宙微波背景数据。我们正在比较我们修改后的运行，如星系恒星质量函数和气体分数的“观测值”的数据，以测试我们的模型的可行性。我也是暗能量调查的成员。我将对DES弱透镜和ACT kSZ数据进行综合分析，以便从观测的角度限制重子反馈。