Early Galaxies in Cold andWarm DarkMatter Universes

冷暗物质宇宙和暖暗物质宇宙中的早期星系

• 批准号: 390015701
• 负责人: Professor Dr. Christoph Pfrommer, since 2/2020
• 金额: --
• 依托单位: Leibniz-Institut für Astrophysik Potsdam (AIP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/390015701?language=en
• 关键词: Early; Galaxies; Cold; andWarm; DarkMatter

The standard paradigm of structure formation relies on the assumption that the nature of dark matter is basically cold (CDM), however, an interesting alternative often advocated to solve CDMsmall-scale problems is warm dark matter (WDM). This latter should have a non-negligible thermal velocity which results in a dumping of small structures. Such dumping is supposedly enhanced at early times. In this project accurate analyses of dedicated numerical N-body hydrodynamical simulations including non-equilibrium molecular networks, gas cooling, star formation, feedback effects and chemical enrichment in primordial dark-matter haloes are proposed. The main goal is to lay down a solid theoretical background for early galaxy formation in the first billion year both in CDM and WDM and to quantify the effects of the small-scale dumping due toWDM. By performing a complete characterization of thermal, chemical and dynamical features of early CDM and WDM structures it will be possible to quantify primordial luminous emissions in the two scenarios and to pose limits on the dark-matter nature through the expected implications on cosmic reionization.

结构形成的标准范式依赖于暗物质的本质是基本冷的假设(CDM)，然而，经常倡导用来解决CDM小尺度问题的一个有趣的替代方案是热暗物质(WDM)。后者应具有不可忽略的热速度，从而导致小型结构的倾倒。据推测，这种倾销在早期被加强了。在这个项目中，我们提出了对原始暗物质晕中的非平衡分子网络、气体冷却、恒星形成、反馈效应和化学浓缩等N体流体力学专用数值模拟的精确分析。主要目标是在CDM和WDM中为第一个十亿年的早期星系形成奠定坚实的理论基础，并量化WDM造成的小范围倾倒的影响。通过对早期清洁发展机制和波分复用结构的热、化学和动力学特征进行完整的描述，将有可能量化这两种情况下的原始发光发射，并通过对宇宙再电离的预期影响对暗物质的性质施加限制。

项目成果

The THESEUS space mission concept: science case, design and expected performances

• DOI: 10.1016/j.asr.2018.03.010
• 发表时间: 2018-07-01
• 期刊: ADVANCES IN SPACE RESEARCH
• 影响因子: 2.6
• 作者: Amati, L.;O'Brien, P.;Zicha, J.
• 通讯作者: Zicha, J.

A [C ii] 158 μm emitter associated with an O i absorber at the end of the reionization epoch

在再电离时代结束时与 Oâi 吸收器相关的 [Câii] 158μm 发射器

• DOI: 10.1038/s41550-021-01471-4
• 发表时间: 2021
• 期刊: Nature Astronomy
• 影响因子: 14.1

Bubble mapping with the Square Kilometre Array – I. Detecting galaxies with Euclid, JWST, WFIRST, and ELT within ionized bubbles in the intergalactic medium at z > 6

使用平方公里阵列绘制气泡图 â I 使用 Euclid、JWST、WFIRST 和 ELT 检测 z > 6 处星系际介质中电离气泡内的星系

• DOI: 10.1093/mnras/staa098
• 发表时间: 2020
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Zackrisson

The detectability of strong 21 centimetre forest absorbers from the diffuse intergalactic medium in late reionisation models

晚期再电离模型中来自弥漫星际介质的强 21 厘米森林吸收体的可探测性

• DOI: 10.1093/mnras/stab1830
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Soltinský

Early black-hole seeds in the first billion years

• DOI: 10.22323/1.362.0014
• 发表时间: 2019-08
• 期刊: Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019)
• 作者: U. Maio