本文将经验QLF与流体动力学及三维多频辐射转移模拟结合，研究氦再电离历史、He II Lyman-α森林统计特征，并评估JWST高红移AGN的影响。
摘要：
近来，基于大型观测汇编的类星体光度函数（QLF）模型已经出现；与此前模型不同，这些模型具有随时间平滑演化的特征。这避免了在利用基于观测的QLF模拟氦再电离时必须假设电离辐射率演化的需要，从而产生更稳健的约束。我们将一个此类QLF与宇宙学流体动力学模拟及三维多频辐射转移相结合。与文献中大多数其他模型相比，模拟得到的再电离历史始终有所延迟。预测的星系际介质温度在z≲3时高于观测值。通过对He II Lyman-α森林进行正演建模，我们表明模型产生了延展的氦再电离，并成功匹配了观测到的有效光深分布的主体；不过，由于小尺度Lyman Limit Systems（莱曼极限系统）的效应未被分辨，模型在z≲2.8时使宇宙过度电离。我们充分刻画了He II Lyman-α森林视线中的透射区和暗隙，并量化了它们对氦再电离的敏感性，为进一步观测研究这一时期开辟了新途径。最后，我们探讨了JWST在z≳5揭示的大量活动星系核对氦再电离的影响。我们发现，除最极端模型外，此类改变不会影响z≤4的任何可观测量，表明观测到的高红移AGN丰度不会对氦再电离产生后果。
英文摘要：
Recently, models of the quasar luminosity function (QLF) rooted on large observational compilations have been produced that, unlike their predecessors, feature a smooth evolution with time. This bypasses the need to assume an ionizing emissivity evolution when simulating helium reionization with observations-based QLF, thus yielding more robust constraints. We combine one such QLF with a cosmological hydrodynamical simulation and 3D multi-frequency radiative transfer. The simulated reionization history is consistently delayed in comparison to most other models in the literature. The predicted intergalactic medium temperature is larger than the observed one at $z \lesssim 3$. Through forward modeling of the He II Lyman-$α$ forest, we show that our model produces an extended helium reionization and successfully matches the bulk of the observed effective optical depth distribution, although it over-ionizes the Universe at $z\lesssim2.8$ as the effect of small-scale Lyman Limit Systems not being resolved. We thoroughly characterize transmission regions and dark gaps in He II Lyman-$α$ forest sightlines. We quantify their sensitivity to the helium reionization, opening a new avenue for further observational studies of this epoch. Finally, we explore the implications for helium reionization of the large number of active galactic nuclei revealed at $z\gtrsim5$ by JWST. We find that such modifications do not affect any observable at $z\leq4$, except in our most extreme model, indicating that the observed abundance of high-$z$ AGNs does not bear consequences for helium reionization.
Breaking Through the Cosmic Fog: JWST/NIRSpec Constraints on Ionizing Photon Escape in Reionization-Era Galaxies
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）；Cosmic Dawn Center (DAWN)（宇宙黎明中心（DAWN））；Max Planck Institut für Astrophysik（马克斯·普朗克天体物理研究所）；Max-Planck-Institut für Astronomie（马克斯·普朗克天文学研究所）；The University of Texas at Austin（德克萨斯大学奥斯汀分校）
Towards Reconciling Reionization with JWST: The Role of Bright Galaxies and Strong Feedback
University of Maryland, College Park（马里兰大学帕克分校）；Space Telescope Science Institute（太空望远镜科学研究所）；University of Zurich（苏黎世大学）；University of Edinburgh（爱丁堡大学）；University of the Western Cape（西开普大学）；New Mexico State University（新墨西哥州立大学）；University of Copenhagen（哥本哈根大学）；Technical University of Denmark（丹麦技术大学）
Reionization driven by the few: the ionizing budget of galaxies at z=5-10 from JWST/NIRSpec
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）；Department of Astronomy, The University of Texas at Austin（德克萨斯大学奥斯汀分校天文学系）；Universidad de Chile（智利大学）
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
Probing the Cosmic Reionization History with JWST: Gunn-Peterson and Ly$α$ Damping Wing Absorption at $4.5 < z < 13$
The University of Tokyo（东京大学）；National Astronomical Observatory of Japan（日本国立天文台）；Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo（东京大学宇宙物理数学研究所（WPI））
Reionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The core of the highest redshift galaxy overdensity at $z = 7.88$ confirmed by NIRSpec/JWST
Ubiquitous Interstellar Neutral Helium Detected with JWST
NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；LATMOS/IPSL, UVSQ Université Paris-Saclay, Sorbonne Université, CNRS（巴黎萨克雷大学UVSQ、索邦大学、国家科学研究中心LATMOS/IPSL）；Department of Physics, University of Miami（迈阿密大学物理系）；Johns Hopkins University（约翰斯·霍普金斯大学）；Department of Astronomy, University of Maryland, College Park（马里兰大学天文学系）；Center for Research and Exploration
Direct T_e-based Metallicities of z=2-9 Galaxies with JWST/NIRSpec: Empirical Metallicity Calibrations Applicable from Reionization to Cosmic Noon
University of Kentucky（肯塔基大学）；University of California, Davis（加州大学戴维斯分校）；University of California, Los Angeles（加州大学洛杉矶分校）；University of Arizona（亚利桑那大学）；University of California, Riverside（加州大学河滨分校）；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）
JWST ASPIRE: How Did Galaxies Complete Reionization? Evidence for Excess IGM Transmission around ${\rm [O\,{\scriptstyle III}]}$ Emitters during Reionization
Resolving dust and Lyα emission in a lensed galaxy at the epoch of reionization with JWST/CANUCS
University of Ljubljana（卢布尔雅那大学）；University of California Davis（加州大学戴维斯分校）；Arizona State University（亚利桑那州立大学）；University of Groningen（格罗宁根大学）；INAF - Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Saint Mary’s University（圣玛丽大学）；Space Telescope Science Institute（太空望远镜科学研究所）
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）
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）
UV slopes of Starforming Galaxies in Strong Lensing fields at the Epoch of Reionization with JWST
University of Ljubljana（卢布尔雅那大学）；University of California Davis（加州大学戴维斯分校）；Dunlap Institute for Astronomy and Astrophysics（邓普天文学与天体物理研究所）；York University（约克大学）；Kapteyn Astronomical Institute, University of Groningen（格罗宁根大学卡普坦天文研究所）；Kavli Institute for Cosmology, University of Cambridge（剑桥大学卡弗里宇宙学研究所）；Cavendish Laboratory - Astrophysics Group, University of Cambridge（剑桥大学卡文迪许实验室天体物理组）
Deep JWST spectroscopy of galaxies in a candidate ionized bubble at $z = 8.7$: probing reionization at pMpc scales with Ly$α$ emission
University of Cambridge（剑桥大学）；University of Arizona（亚利桑那大学）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；University of Vienna（维也纳大学）
