The Rise of Faint, Red AGN at $z>4$: A Sample of Little Red Dots in the JWST Extragalactic Legacy Fields
Dale D. Kocevski, Steven L. Finkelstein, Guillermo Barro, Anthony J. Taylor, Antonello Calabrò, Brivael Laloux, Johannes Buchner, Jonathan R. Trump, Gene C. K. … 展开作者
Dale D. Kocevski, Steven L. Finkelstein, Guillermo Barro, Anthony J. Taylor, Antonello Calabrò, Brivael Laloux, Johannes Buchner, Jonathan R. Trump, Gene C. K. Leung, Guang Yang, Mark Dickinson, Pablo G. Pérez-González, Fabio Pacucci, Kohei Inayoshi, Rachel S. Somerville, Elizabeth J. McGrath, Hollis B. Akins, Micaela B. Bagley, Laura Bisigello, Rebecca A. A. Bowler, Adam Carnall, Caitlin M. Casey, Yingjie Cheng, Nikko J. Cleri, Luca Costantin, Fergus Cullen, Kelcey Davis, Callum T. Donnan, James S. Dunlop, Richard S. Ellis, Henry C. Ferguson, Seiji Fujimoto, Adriano Fontana, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Nimish P. Hathi, Michaela Hirschmann, Marc Huertas-Company, Benne W. Holwerda, Garth Illingworth, Stéphanie Juneau, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Wenxiu Li, Ray A. Lucas, Dan Magee, Charlotte Mason, Derek J. McLeod, Ross J. McLure, Lorenzo Napolitano, Casey Papovich, Nor Pirzkal, Giulia Rodighiero, Paola Santini, Stephen M. Wilkins, L. Y. Aaron Yung
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32 pages, 28 figures, accepted or publication in ApJ
We present a sample of 341 "little red dots" (LRDs) spanning the redshift range $z\sim2-11$ using data from the CEERS, PRIMER, JADES, UNCOVER and NGDEEP surveys. Unlike past use of color indices to identify LRDs, we employ continuum slope fitting using shifting bandpasses to sample the same rest-frame emission blueward and redward of the Balmer break. This enables the detection of LRDs over a wider redshift range and with less contamination from galaxies with strong breaks that otherwise lack a rising red continuum. The redshift distribution of our sample increases at $z<8$ and then undergoes a rapid decline at $z\sim4.5$, which may tie the emergence of these sources to the inside-out growth that galaxies experience during this epoch. We find that LRDs are $\sim1$ dex more numerous than X-ray and UV selected AGN at z~5-7. Within our sample, we have identified the first two X-ray detected LRDs. An X-ray spectral analysis confirms that these AGN are moderately obscured with $\log\,(N_{\rm H}/{\rm cm}^{2}$) of $23.3^{+0.4}_{-1.3}$ and $22.72^{+0.13}_{-0.16}$. Our analysis reveals that reddened AGN emission dominates their rest-optical light, while the rest-UV originates from their host galaxies. We also present NIRSpec observations from the RUBIES survey of 17 LRDs that show broad emission lines consistent with AGN activity. The confirmed AGN fraction of our sample is 71\% for sources with F444W<26.5. In addition, we find three LRDs with blue-shifted Balmer absorption features in their spectra, suggesting an outflow of high-density, low-ionization gas from near the central engine of these faint, red AGN.
The Far-Ultraviolet Extragalactic Legacy (FUEL) Survey: Hubble Far-UV Images and Catalogs of the Extragalactic Legacy Fields
University of California, Riverside(加州大学河滨分校);California Institute of Technology(加州理工学院);Universidad Complutense de Madrid(马德里康普顿斯大学);University of Western Australia(西澳大学);Stockholm University(斯德哥尔摩大学);University of California at Santa Cruz(加州大学圣克鲁兹分校);Clemson University(克莱姆森大学)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Catalogs of inferred morphological properties of galaxies from JWST/NIRCam imaging in GOODS-N and GOODS-S
University of California, Santa Cruz(加州大学圣克鲁兹分校);University of Cambridge(剑桥大学);University of Arizona(亚利桑那大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);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);University of Hertfordshire(赫特福德大学);The Johns Hopkins University(约翰斯·霍普金斯大学);University College London(伦敦大学学院);Space Telescope Science Institute(太空望远镜科学研究所);NSF National Optical-Infrared Astronomy Research Laboratory(美国国家光学-红外天文研究实验室)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: NIRCam Imaging in GOODS-S and GOODS-N
Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天文与天体物理系);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Wisp Subtraction with the Non-negative Matrix Factorization Algorithm
Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Department of Physics and Astronomy, The Johns Hopkins University(约翰斯·霍普金斯大学物理与天文系);Space Telescope Science Institute(太空望远镜科学研究所);Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天文与天体物理系);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室)
Deep Extragalactic VIsible Legacy Survey (DEVILS): SED Fitting in the D10-COSMOS Field and the Evolution of the Stellar Mass Function and SFR-$M_\star$ relation
Deep Extragalactic VIsible Legacy Survey (DEVILS): Morphologically-selected galaxy merger fractions and their direct comparison to close-pair samples
The University of Western Australia(西澳大利亚大学);Monash University(莫纳什大学);Instituto Astrofisica de Canarias(加那利天体物理研究所);Institute of Space Sciences (ICE, CSIC)(空间科学研究所)
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)
Legacy ExtraGalactic UV Survey with The Hubble Space Telescope. Stellar cluster catalogues and first insights into cluster formation and evolution in NGC 628
我们报告了大量的努力,这是生产全面的高层次的年轻星团(YSC)目录的一个显着的一部分星系观察与遗产银河系外紫外线调查(LEGUS)哈勃国库计划。我们提出的方法来提取集群的位置,验证其真正的性质,产生多波段测光(从NUV到NIR),并通过光谱能量分布拟合分析得出其物理性质。我们使用附近的螺旋星系NGC628作为一个测试案例,展示了LEGUS将对我们理解YSC的形成和演化及其宿主星系内的紧凑恒星协会产生的影响。我们分析了从紫外到近红外的簇光度函数,发现在亮端和所有波长处都有一个陡峭的变化,这表明发光簇的缺乏。NGC 628的质量函数与斜率为$\sim -2$的幂律分布和$10^5$ M $_\odot$的几倍截断一致。在它们形成之后,YSC和紧密协会遵循不同的进化路径。YSC存活时间更长,证实它们是潜在的结合系统。星系团在时间尺度上的消失与恒星形成区的等级组织相当,这表明它们是一个膨胀的系统。我们发现在NGC628的内部区域存在与质量无关的星系团分裂,而在星系的外部,几乎没有或根本没有分裂。我们观察到更快的破坏率低质量($\leq$ $10^4$ M $_\odot$)集群表明,一个质量依赖的组件是必要的,以充分描述在NGC628的YSC中断过程。
Deep Extragalactic VIsible Legacy Survey (DEVILS): Identification of AGN through SED Fitting and the Evolution of the Bolometric AGN Luminosity Function
The JWST-PRIMAL Legacy Survey. A JWST/NIRSpec reference sample for the physical properties and Lyman-$α$ absorption and emission of $\sim 500$ galaxies at $z=5.5-13.4$
Extragalactic magnetism with SOFIA (SALSA Legacy Program). VI. The magnetic fields in the multi-phase interstellar medium of the Antennae galaxies
合并被认为是星系生长的一个基本通道,扰动了星际介质(ISM)中的气体动力学和磁场(B场)。然而,在合并过程中放大和消散B场的机制仍不清楚。本文描述了最近的两个旋涡星系合并的多相ISM中有序B场的形态。我们比较推断的B-字段使用$154~μ$ m热尘埃和$11$厘米无线电同步辐射偏振观测。我们发现,$154~μ$ m的B-场是更有序的跨星系比$11$ cm的B-场。顺序$154~μ$ m B场在星系核心和恒星形成区增加。残余螺旋臂具有有序的螺旋$154~μ$ m B场,而$11$ cm B场是径向的。$154~μ$ m B场可能是由恒星形成区驱动的具有高$^{12}$ CO(1-0)速度色散的湍流发电机主导的,而$11$ cm B场是由星系相互作用驱动的具有高HI速度色散的共空间。这一结果表明,星系中的暖气体主要受到合并的扰动,而稠密气体仍然遵循残余旋臂的动力学过程,我们发现连接两个星系的是一个$\sim8.9$ kpc尺度的有序B场。潮汐尾的底部与HI和$^{12}$ CO(1-0)辐射是同空间的,并具有由合并驱动的压缩和/或剪切的$154~μ$ m和$11$ cm B场。我们认为,相对于系统的其余部分和其他螺旋星系,放大的B场可能支持两个星系和潮汐尾之间的气体流动。
PHANGS-JWST: the largest extragalactic molecular cloud catalog traced by polycyclic aromatic hydrocarbon emission
University of Bonn(波恩大学);Ohio State University(俄亥俄州立大学);Center for Cosmology and Astroparticle Physics(宇宙学与基本粒子物理中心);University of Alberta(阿尔伯塔大学);University of California, San Diego(加利福尼亚大学圣地亚哥分校);Cardiff University(卡迪夫大学);Stockholm University(斯德哥尔摩大学);Universität zu Köln(科隆大学);Universiteit Gent(根特大学)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: MIRI Coordinated Parallels in GOODS-S and GOODS-N
Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Space Telescope Science Institute(太空望远镜科学研究所);Department of Physics, University of Oxford(牛津大学物理系);Centre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire(赫特福德大学物理、天文学和数学系天体物理研究中心);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Department of Physics and Astronomy, The Johns Hopkins University(约翰斯·霍普金斯大学物理与天文学系);Department of Astronomy & Astrophysics, The Pennsylvania State University(宾夕法尼亚州立大学天文与天体物理学系)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Photometrically Selected Galaxy Candidates at z > 8
Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);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);Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天文学与天体物理学系);Cosmic Dawn Center (DAWN)(宇宙黎明中心(DAWN));Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所)
Deep Extragalactic VIsible Legacy Survey (DEVILS): First Data Release Covering The D10 (COSMOS) Region
ICRAR, The University of Western Australia(西澳大利亚大学);Department of Physics & Astronomy, McMaster University(麦克马斯特大学);Jodrell Bank Centre for Astrophysics, University of Manchester(曼彻斯特大学);Australian Astronomical Optics, Macquarie University(麦考瑞大学);School of Physics & Astronomy, Monash University(莫纳什大学);Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney(悉尼大学);Astrophysics Group, School of Physics, University of Bristol(布里斯托大学);Instituto de Astrofísica de Canarias(加那利天体物理研究所);Departamento de Astrofísica, Universidad de La Laguna (ULL)(拉帕尔马大学);Research School of Astronomy and Astrophysics, Australian National University(澳大利亚国立大学)
JWST Advanced Deep Extragalactic Survey (JADES) Data Release 5: Photometric Catalog
Department of Astronomy and Astrophysics, University of California, Santa Cruz(加州大学圣克鲁兹分校天体物理学与天文学系);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Steward Observatory, University of Arizona(亚利桑那大学斯图德天文台);AURA for the European Space Agency (ESA), Space Telescope Science Institute(欧洲航天局(ESA)所属美国大学研究协会(AURA)太空望远镜科学研究所);Centro de Astrobiología (CAB), CSIC–INTA(西班牙国家航空航天技术研究所(INTA)/西班牙国家科学研究委员会(CSIC)天体生物学中心)
Extragalactic Magnetism with SOFIA (SALSA Legacy Program). VII. A Tomographic View of Far-infrared and Radio Polarimetric Observations through MHD Simulations of Galaxies
IAU Commission 37 "Star Clusters and Associations" Legacy report
人们普遍认为,恒星不是孤立形成的,而是分子云分裂的结果,这反过来又导致了恒星团簇形成。随着时间的推移,星系团溶解或被分子云或潮汐剥离的相互作用所破坏,它们的成员成为一般场人口的一部分。因此,星团是星系的基本组成部分。反过来,从年轻的星协和疏散星团到年老的球状星团,星团的数量是其母星系形成、聚集和演化历史的有力线索。虽然它们的重要性已经被认识了几十年,但这一领域的重大进展只是在最近几年才成为可能,无论是对银河系还是河外星系团。星团是恒星天体物理和演化的观测基础,是研究星系结构的重要示踪物,是独特的恒星动力学环境。恒星形成、恒星结构、恒星演化和恒星核合成等方面的研究都从这些系统的研究中获益匪浅。此外,基本量,如初始质量函数可以成功地从建模的H-R图或集成的速度结构,分别解决和未解决的集群和集群人口。因此,星团研究横跨银河系和河外天体物理学领域,同时也极大地影响了我们对致密环境中恒星形成过程的详细理解。本报告重点介绍了IAU第37委员会(37 Committee:Star clusters and associations)在过去十年中所涵盖的主要领域的科学成果。