Using the FirstLight database of 300 zoom-in cosmological simulations we provide rest-frame UV-optical spectral energy distributions of galaxies with complex star-formation histories that are coupled to the non-uniform gas accretion history of galactic halos during cosmic dawn. The population at any redshift is very diverse ranging from starbursts to quiescent galaxies even at a fixed stellar mass. This drives a redshift-dependent relation between UV luminosity and stellar mass with a large scatter, driven by the specific star formation rate. The UV slope and the production efficiency of Lyman continuum photons have high values, consistent with dust-corrected observations. This indicates young stellar populations with low metallicities. The FirstLight simulations make predictions on the rest-frame UV-optical absolute magnitudes, colors and optical emission lines of galaxies at z=6-12 that will be observed for the first time with JWST and the next generation of telescopes in the coming decade.
Accelerated size evolution in the FirstLight simulations from z=14 to z=5
Universidad Autonoma de Madrid(马德里自治大学);Flatiron Institute(平顿研究所);The University of Tokyo(东京大学);Kavli Institute for the Physics and Mathematics of the Universe (WPI), UT Institute for Advanced Study, The University of Tokyo(东京大学宇宙研究前沿机构 Kavli宇宙物理与数学研究所(WPI));Research Center for the Early Universe, School of Science, The University of Tokyo(东京大学理学部宇宙早期研究中心);Universität Heidelberg(海德堡大学);Centro de Astrobiología (CAB), CSIC-INTA(西班牙国家天文生物研究中心 (CAB),CSIC-INTA)
A merger-driven scenario for clumpy galaxy formation in the epoch of reionization: Physical properties of clumps in the FirstLight simulation
The University of Tokyo(东京大学);Kavli Institute for the Physics and Mathematics of the Universe (WPI), UT Institute for Advanced Study, The University of Tokyo(宇宙物理与数学 Kavli 研究所(WPI),UT 高等研究院,东京大学);Research Center for the Early Universe, School of Science, The University of Tokyo(东京大学理学部早期宇宙研究中心)
Instituto de Astronomía y Física del Espacio, CONICET–UBA(空间物理与天文学研究所,阿根廷国家科学和技术研究委员会-布宜诺斯艾利斯大学);Departamento de Fisica Teorica, Universidad Autonoma de Madrid(马德里自治大学理论物理系);CIAFF, Facultad de Ciencias, Universidad Autonoma de Madrid(马德里自治大学理学院CIAFF)
Nanohertz Gravitational-Wave Constraints on Supermassive Binary Black Holes at Cosmic Dawn
Beijing Normal University(北京师范大学);Curtin University(科廷大学);Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(爱因斯坦研究所));Leibniz Universität Hannover(汉诺威莱布尼茨大学);Monash University(蒙纳士大学);University of Melbourne(墨尔本大学)
Consistent Gas-Phase Temperatures and Metallicities from UV and Optical Nebular Emission: A Reliable Foundation from z=0 to Cosmic Dawn
University of California Davis(加州大学戴维斯分校);The Chinese University of Hong Kong(香港中文大学);University of Kentucky(肯塔基大学);The Observatories of the Carnegie Institution for Science(卡内基科学机构天文台);University of Hawaii(夏威夷大学);Sorbonne Université(索邦大学)
Ionizing Photon Production Efficiencies and Chemical Abundances at Cosmic Dawn Revealed by Ultra-Deep Rest-Frame Optical Spectroscopy of JADES-GS-z14-0
The Pennsylvania State University(宾夕法尼亚州立大学);University of Arizona(亚利桑那大学);University of Cambridge(剑桥大学)
Discovery of Quasar Variability and Early Accretion Disk Signatures at Cosmic Dawn
Massachusetts Institute of Technology(麻省理工学院);Columbia University(哥伦比亚大学);Flatiron Institute(平顿研究所);University of Portsmouth(朴茨茅斯大学);University of Arizona(亚利桑那大学);University of Michigan(密歇根大学)
EGS-z11-R0: a red, dust-rich galaxy at Cosmic Dawn
Università di Padova(帕多瓦大学);INAF, Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);Scuola Normale Superiore(比萨高等师范学院);INAF, Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Centro de Astrobiología (CAB), CSIC-INTA(西班牙国家科学技术研究委员会-国家航空航天技术研究所天体生物学中心);Institute of Science and Technology Austria (ISTA)(奥地利科学与技术学院);INAF-Osservatorio di Astrofisica e Scienza dello Spazio(意大利国家天体物理研究所天体物理学与空间科学观测站);Department of Astronomy, The University of Texas at Austin(德克萨斯大学奥斯汀分校天文学系);Space Telescope Science Institute(太空望远镜科学研究所);Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);SISSA - International School for Advanced Studies(国际高等研究院);INAF - Osservatorio Astronomico di Trieste(意大利国家天体物理研究所的里雅斯特天文台);INFN – National Institute for Nuclear Physics(意大利国家核物理研究所)
An Attenuation Bump at z=9.3: Probing Dust Diversity at Cosmic Dawn
Università di Padova(帕多瓦大学);INAF, Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);Centro di Ateneo di Studi e Attività spaziali ”Giuseppe Colombo” - CISAS(朱塞佩·科洛姆博太空研究与活动中心);Instituto de Radioastronomía y Astrofísica, UNAM(墨西哥国立自治大学射电天文与天体物理研究所);INAF - Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Scuola Normale Superiore(比萨高等师范学院);Centro B. Segre, Accademia Nazionale dei Lincei(林琴学院B.塞格雷中心)
Radio Quasars in the Cosmic Dawn: A Spectroscopic Sample from the DESI Survey
NSF NOIRLab, Gemini Observatory(美国国家光学-红外天文研究实验室,双子座天文台);Department of Astronomy, University of Michigan(密歇根大学天文学系);Centre for Extragalactic Astronomy, Department of Physics, Durham University(杜伦大学物理系河外天文中心);NSF NOIRLab(美国国家光学-红外天文研究实验室);Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);European Southern Observatory (ESO)(欧洲南方天文台);School of Mathematics, Statistics and Physics, Newcastle University(纽卡斯尔大学数学、统计与物理学院);Centre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire(赫特福德大学物理、天文与数学学院天体物理研究中心);Leiden Observatory, Leiden University(莱顿大学莱顿天文台)
Rapid radio variability in the $z\sim7$ blazar VLASS J0410$-$0139: Indication of a hidden population of weak radio jets at Cosmic Dawn
Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);INAF-Osservatorio di Astrofisica e Scienza dello Spazio(意大利国家天体物理研究所空间科学观测站);NSF NOIRLab, Gemini Observatory(美国国家光学红外天文研究实验室双子座天文台);ASTRON, The Netherlands Institute for Radio Astronomy(荷兰射电天文研究所);Leiden Observatory, Leiden University(莱顿大学莱顿天文台);National Radio Astronomy Observatory(国家射电天文台);Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales(迭戈·波特莱斯大学工程与科学学院天体物理研究所);Department of Astronomy Astrophysics and Space Engineering, Indian Institute of Technology Indore(印度印多尔理工学院天文、天体物理与空间工程系)
Novel $z\sim~10$ auroral line measurements extend the gradual offset of the FMR deep into the first Gyr of cosmic time
Cosmic Dawn Center (DAWN)(宇宙黎明中心);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Department of Astronomy, University of Geneva(日内瓦大学天文学系);Department of Physics & Astronomy, University College London(伦敦大学学院物理与天文系);Institute for Astronomy, University of Edinburgh(爱丁堡大学天文学研究所)
Precise C-N-O Abundances of Individual Galaxies in the First Billion Years from Ultra-Deep, Rest-UV-to-Optical JWST Spectroscopy
University College London(伦敦大学学院);University of Kentucky(肯塔基大学);University of California, Los Angeles(加州大学洛杉矶分校);University of Geneva(日内瓦大学);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);CNRS, IRAP(法国国家科学研究中心,天体物理研究研究所)
Characterising Ly$α$ damping wings at the onset of reionisation: Evidence for highly efficient star formation driven by dense, neutral gas in UV-bright galaxies at $z>9$
Cosmic Dawn Center (DAWN)(宇宙黎明中心);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);DTU Space, Technical University of Denmark(丹麦技术大学空间研究所);Institute for Computational Cosmology, Department of Physics, Durham University(杜伦大学物理学院计算宇宙学研究所);David A. Dunlap Department of Astronomy and Astrophysics, University of Toronto(多伦多大学大卫·A·邓普林天文与天体物理系)
Nebular continuum in high-redshift galaxies with JWST
Instituto de Astrofísica e Ciências do Espaço, Universidade de Lisboa - OAL(空间科学与天体物理研究所,里斯本大学);Departamento de Física, Faculdade de Ciências da Universidade de Lisboa(里斯本大学理学院物理系);Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto – CAUP(波尔图大学空间科学与天体物理研究所)
Investigating ionising sources and the complex interstellar medium of GHZ2 at $z=12.3$
INAF Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Università di Firenze, Dipartimento di Fisica e Astronomia(佛罗伦萨大学物理与天文学系);INAF – Arcetri Astrophysical Observatory(意大利国家天体物理研究所阿切特里天文台);European Southern Observatory(欧洲南方天文台);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);Department of Space, Earth, & Environment, Chalmers University of Technology(查尔姆斯理工大学空间、地球与环境系);NSF’s NOIRLab(美国国家科学基金会NOIR实验室);Institute of Science and Technology Austria (ISTA)(奥地利科学与技术研究所);IPAC, California Institute of Technology(加州理工学院IPAC);Centre for Astrophysics and Supercomputing, Swinburne University of Technology(斯威本科技大学天体物理学与超级计算中心)
Quasar Impostors: Two Extremely UV-Bright ($M_{\rm UV}\approx-23.5$) Reionisation-Epoch Galaxies Powered by Very Massive Stars
Leiden University(莱顿大学);University of California, Santa Barbara(加州大学圣塔芭芭拉分校);Heidelberg University(海德堡大学);Max-Planck-Institut für Astronomie(马克斯·普朗克天文学研究所);University of California, Los Angeles(加州大学洛杉矶分校)