Early galaxies were the radiation source for reionization, with the photoheating feedback from the reionization process expected to reduce the efficiency of star formation in low mass haloes. Hence, to fully understand reionization and galaxy formation, we must study their impact on each other. The THESAN project has so far aimed to study the impact of galaxy formation physics on reionization, but here we present the new THESAN simulations with a factor 50 higher resolution ($m_{\rm b} \approx 10^4$~M$_\odot$) that aim to self-consistently study the back-reaction of reionization on galaxies. By resolving haloes with virial temperatures $T_{\rm vir} < 10^4$~K, we are able to demonstrate that simplistic, spatially-uniform, reionization models are not sufficient to study early galaxy evolution. Comparing the self-consistent THESAN model (employing fully coupled radiation hydrodynamics) to a uniform UV background, we are able to show that galaxies in THESAN are predicted to be larger in physical extent (by a factor $\sim 2$), less metal enriched (by $\sim 0.2$~dex), and less abundant (by a factor $\sim 10$ at $M_{\rm 1500}~=~-10$) by $z=5$. We show that differences in star formation and enrichment patterns lead to significantly different predictions for star formation in low mass haloes, low-metallicity star formation, and even the occupation fraction of haloes. We posit that cosmological galaxy formation simulations aiming to study early galaxy formation $z \gtrsim 3$ must employ a spatially inhomogeneous UV background to accurately reproduce galaxy properties.
The THESAN project: environmental drivers of Local Group reionization
University of Southern California(南加州大学);Carnegie Observatories(卡内基观测站);The University of Texas at Dallas(德克萨斯大学达拉斯分校);York University(约克大学);Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学 Kavli 宇宙物理数学研究所(WPI)、UTIAS);Tsinghua University(清华大学);Massachusetts Institute of Technology(麻省理工学院)
The THESAN project: Lyman-alpha emitters as probes of ionized bubble sizes
Massachusetts Institute of Technology(麻省理工学院);The University of Texas at Dallas(德克萨斯大学达拉斯分校);Universidad ECCI(ECCI大学);York University(约克大学);The University of Tokyo(东京大学);University of Edinburgh(爱丁堡大学)
The THESAN-ZOOM project: The Hidden Neighbours of OI Absorbers during Reionization
University of Edinburgh(爱丁堡大学);York University(约克大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿基米德天体物理研究所);The University of Texas at Dallas(得克萨斯大学达拉斯分校);University of Pennsylvania(宾夕法尼亚大学);The University of Tokyo(东京大学);Massachusetts Institute of Technology(麻省理工学院);Center for Astrophysics | Harvard & Smithsonian(哈佛史密森尼天体物理中心)
From THESAN-ZOOM to JWST: Predicting ionizing photon escape and the rise of UV-bright reionization sources
University of Cambridge(剑桥大学);The University of Texas at Dallas(德克萨斯大学达拉斯分校);York University(约克大学);The University of Tokyo(东京大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿纳西斯天文台);Massachusetts Institute of Technology(麻省理工学院)
JWST ASPIRE: How Did Galaxies Complete Reionization? Evidence for Excess IGM Transmission around ${\rm [O\,{\scriptstyle III}]}$ Emitters during Reionization
The THESAN-ZOOM project: Star-formation efficiencies in high-redshift galaxies
Massachusetts Institute of Technology(麻省理工学院);York University(约克大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿纳尼天体物理研究所);The University of Texas at Dallas(德克萨斯大学达拉斯分校);University of Pennsylvania(宾夕法尼亚大学);The University of Tokyo(东京大学);Institute for Fundamental Physics of the Universe(基础物理宇宙研究所);University of Edinburgh(爱丁堡大学);Center for Astrophysics | Harvard & Smithsonian(哈佛-史密森尼天体物理中心);University of Cambridge(剑桥大学)
The THESAN-ZOOM project: central starbursts and inside-out quenching govern galaxy sizes in the early Universe
University of Cambridge(剑桥大学);The University of Texas at Dallas(德克萨斯大学达拉斯分校);York University(约克大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿佩尔天体物理研究所);University of Pennsylvania(宾夕法尼亚大学);The University of Tokyo(东京大学);Institute for Fundamental Physics of the Universe(基础宇宙物理研究所);University of Edinburgh(爱丁堡大学)
On the unique evolutionary mechanisms of massive quiescent galaxies in the epoch of reionisation
Swinburne University of Technology(斯威本科技大学);JWST Australia Data Centre [JADC], Swinburne Advanced Manufacturing and Design Centre [AMDC](JWST澳大利亚数据中心,斯威本先进制造与设计中心)
The THESAN-ZOOM project: clumpiness of high-redshift galaxies and its connection to bursty star formation
Peking University(北京大学);Massachusetts Institute of Technology(麻省理工学院);Kavli Institute for Astronomy and Astrophysics, Peking University(北京大学 Kavli 天体物理研究所);Center for Astrophysics | Harvard & Smithsonian(哈佛-史密森尼天体物理中心);York University(约克大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿诺德·爱因斯坦天文所);The University of Texas at Dallas(得克萨斯大学达拉斯分校);University of Pennsylvania(宾夕法尼亚大学);The University of Tokyo(东京大学)
The THESAN-ZOOM project: Burst, quench, repeat -- unveiling the evolution of high-redshift galaxies along the star-forming main sequence
Kavli Institute for Cosmology, University of Cambridge(卡弗里宇宙学研究所,剑桥大学);Cavendish Laboratory, University of Cambridge(卡文迪许实验室,剑桥大学);Department of Physics, The University of Texas at Dallas(德克萨斯大学达拉斯分校物理系);Department of Physics and Astronomy, York University(约克大学物理与天文系);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿斯特拉诺伊克莱布尼茨研究所);Department of Physics and Astronomy, University of Pennsylvania(宾夕法尼亚大学物理与天文系);Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学 Kavli 宇宙物理学与数学起源联合研究中心(WPI),UTIAS);Institute for Fundamental Physics of the Universe(宇宙基本物理研究所);Institute for Astronomy, University of Edinburgh(爱丁堡大学天文学研究所)
RIGEL: Ultra-faint dwarf galaxy diversity shaped by inhomogeneous cosmic reionization
Tsinghua University(清华大学);Leibniz-Institut für Astrophysik Potsdam(波茨坦阿诺德·爱因斯坦天体物理研究所);Institut für Theoretische Astrophysik, Zentrum für Astronomie, Universität Heidelberg(海德堡大学天体物理学中心理论天体物理研究所);The University of Texas at Dallas(达拉斯德州大学);York University(约克大学);University of Bologna(博洛尼亚大学);INAF, Astrophysics and Space Science Observatory Bologna(意大利国家天体物理研究所博洛涅空间科学天文台);Columbia University(哥伦比亚大学);Northwestern University(西北大学);Massachusetts Institute of Technology(麻省理工学院)
Probing Direct Contributions of Galaxies and AGN to Cosmic Reionization in a Quasar Field J0226+0302 with JWST NIRCam and NIRSpec
University of Michigan(密歇根大学);Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所黎明中心);Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学宇宙起源研究核心理论研究中心);Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo(东京大学宇宙起源研究核心理论中心数据驱动发现中心);Department of Physics & Astronomy, University of California, Riverside(加州大学河滨分校物理与天文学系)
A Portrait of the Cosmic Reionisation History in the Context of the Early Dark Energy Model
National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);University of Chinese Academy of Sciences(中国科学院大学);Peking University(北京大学);Swinburne University of Technology(斯威本科技大学);University of Arizona(亚利桑那大学)
Can an Anti-de Sitter Vacuum in the Dark Energy Sector Explain JWST High-Redshift Galaxy and Reionization Observations?
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research(塔塔基础研究所射电天体物理国家中心);Jamia Millia Islamia(贾米娅米利亚伊斯兰大学);Korea Astronomy and Space Science Institute(韩国天文与空间科学研究院)
A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
The $z \gtrsim 9$ galaxy UV luminosity function from the JWST Advanced Deep Extragalactic Survey: insights into early galaxy evolution and reionization
University of Arizona(亚利桑那大学);University of California, Berkeley(加州大学伯克利分校);University of California, Santa Cruz(加州大学圣克鲁兹分校);University of Texas, Austin(德克萨斯大学奥斯汀分校);University of Copenhagen(哥本哈根大学);European Space Agency(欧洲空间局)