近期计算表明，红移 z ~ 6 - 7 的类星体的射电辐射可以在演化更早的阶段，即 z ~ 14 - 15，被下一代甚大阵列（ngVLA）和平方公里阵列（SKA）探测到。然而，詹姆斯·韦布空间望远镜（James Webb Space Telescope）目前已经发现了红移 z > 4 处光度较低的活动星系核（AGNs）以及少数位于 z > 10 的大质量黑洞（BHs），它们可能是超大质量黑洞（SMBHs）的前身，但处于不同的增长阶段。对这些新发现的活动星系核进行射电探测将为其性质及其宿主星系的性质提供互补的测量手段。在此，我们估算了由 JADES、CEERS 和 UNCOVER 巡天发现的 19 个新活动星系核的射电流量密度。我们发现，ngVLA 应能在积分时间为 10 - 100 小时的目标巡天中探测到其中大多数源（其中少数源仅需 1 小时），但尽管 SKA 在低频具有更高的灵敏度，大多数源仍需要至少 100 小时的 SKA 观测时间。在某些情况下，来自黑洞的射电辐射可以与其宿主星系中 H II 区和超新星的射电辐射区分开来，这可用于估算其恒星形成率。此类探测将成为未来十年近红外望远镜与射电望远镜在超大质量黑洞科学研究中富有成效的协同作用的又一例证。
英文摘要：
Recent calculations indicate that radio emission from quasars at $z \sim$ 6 - 7 could be detected at much earlier stages of evolution, at $z \sim$ 14 - 15, by the Next-Generation Very Large Array (ngVLA) and the Square Kilometer Array (SKA). However, the {\em James Webb Space Telescope} has now discovered less luminous active galactic nuclei (AGNs) at $z >$ 4 and a few massive black holes (BHs) at $z >$ 10, which may be the progenitors of supermassive black holes (SMBHs) but at different stages of growth. Radio detections of these new AGNs would provide complementary measures of their properties and those of their host galaxies. Here we estimate radio flux densities for 19 new AGNs found by the JADES, CEERS and UNCOVER surveys. We find that ngVLA should be able to detect most of these sources in targeted surveys with integration times of 10 - 100 hr (and in just 1 hr for a few of them) but most would require at least 100 hr of SKA time in spite of its greater sensitivities at low frequencies. In some cases, radio emission from the BH can be distinguished from that of H II regions and supernovae in their host galaxies, which could be used to estimate their star formation rates. Such detections would be yet another example of the useful synergies between near infrared and radio telescopes in SMBH science in the coming decade.
Adding Value to JWST Spectra and Photometry: Stellar Population and Star Formation Properties of Spectroscopically Confirmed JADES and CEERS Galaxies at $z > 7$
本文分析 43 个 JADES/CEERS 经光谱证认的 $z>7$ JWST 星系，联合 SED 拟合、光谱线、测光与形态信息，揭示其上升的恒星形成历史、测光 EW 偏差及近期星暴贡献。
JWST CEERS & JADES Active Galaxies at z = 4-7 Violate the Local $M_\bullet-M_\star$ Relation at $>3σ$: Implications for Low-Mass Black Holes and Seeding Models
Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs
Universidade do Vale do Paraíba（瓦利杜帕拉伊巴大学）；Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata（拉普拉塔国立大学天文与地球物理科学学院）；Instituto de Astrofísica de La Plata (CONICET-UNLP)（拉普拉塔天体物理研究所）；Departamento de Física, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria（圣玛丽亚联邦大学自然与精确科学中心物理系）；INAF – Osservatorio Astrofisico di Arcetri（意大利国家天体物理研究所阿切特里天文台）
EPOCHS Paper II: The Ultraviolet Luminosity Function from $7.5<z<13.5$ using 180 square arcminutes of deep, blank-fields from the PEARLS Survey and Public JWST data
Black Holes in the Shadow: The Missing High-Ionization Lines in the Earliest JWST AGNs
Università degli Studi di Milano-Bicocca（米兰比可卡大学）；Stockholm University（斯德哥尔摩大学）；University of Cambridge（剑桥大学）；University College London（伦敦大学学院）；University of California Santa Cruz（加州大学圣克鲁兹分校）
