The Massive Ancient Galaxies At $z>3$ NEar-infrared (MAGAZ3NE) Survey: Confirmation of Extremely Rapid Star-Formation and Quenching Timescales for Massive Galaxies in the Early Universe
Ben Forrest, Z. Cemile Marsan, Marianna Annunziatella, Gillian Wilson, Adam Muzzin, Danilo Marchesini, M. C. Cooper, Jeffrey C. C. Chan, Ian McConachie, Percy G… 展开作者
Ben Forrest, Z. Cemile Marsan, Marianna Annunziatella, Gillian Wilson, Adam Muzzin, Danilo Marchesini, M. C. Cooper, Jeffrey C. C. Chan, Ian McConachie, Percy Gomez, Erin Kado-Fong, Francesco La Barbera, Daniel Lange-Vagle, Julie Nantais, Mario Nonino, Paolo Saracco, Mauro Stefanon, Remco F. J. van der Burg
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Accepted for publication in ApJ. 18 pages, 11 figures in main text
We present near-infrared spectroscopic confirmations of a sample of 16 photometrically-selected galaxies with stellar masses log(M_star/M_sun) > 11 at redshift z > 3 from the XMM-VIDEO and COSMOS-UltraVISTA fields using Keck/MOSFIRE as part of the MAGAZ3NE survey. Eight of the ultra-massive galaxies (UMGs) have specific star formation rates (sSFR) < 0.03 Gyr-1, with negligible emission lines. Another seven UMGs show emission lines consistent with active galactic nuclei and/or star formation, while only one UMG has sSFR > 1 Gyr-1. Model star formation histories of these galaxies describe systems that formed the majority of their stars in vigorous bursts of several hundred Myr duration around 4 < z < 6during which hundreds to thousands of solar masses were formed per year. These formation ages of < 1 Gyr prior to observation are consistent with ages derived from measurements of Dn(4000) and EW0(Hδ). Rapid quenching followed these bursty star-forming periods, generally occurring less than 350 Myr before observation, resulting in post-starburst SEDs and spectra for half the sample. The rapid formation timescales are consistent with the extreme star formation rates observed in 4 < z < 7 dusty starbursts observed with ALMA, suggesting that such dusty galaxies are progenitors of these UMGs. While such formation histories have been suggested in previous studies, the large sample introduced here presents the most compelling evidence yet that vigorous star formation followed by rapid quenching is almost certainly the norm for high mass galaxies in the early universe. The UMGs presented here were selected to be brighter than Ks = 21.7 raising the intriguing possibility that even (fainter) older quiescent UMGs could exist at this epoch.
Ejective feedback as a quenching mechanism in the 1.5 billion years of the universe: detection of neutral gas outflow in a $z=4$ recently quenched galaxy
Feeding the Dead: Neutral Gas Inflow in a Long-Quenched Ancient Massive Galaxy at $z\sim 2.7$ Observed with JWST/NIRSpec
Tufts University（塔夫茨大学）；INAF - Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；INAF - Osservatorio Astronomico di Capodimonte（意大利国家天体物理研究所卡波迪蒙特天文台）；Dipartimento di Fisica e Astronomia, Universitá di Bologna（博洛尼塔大学物理与天文学系）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯玻尔研究所）；European Space Research and Technology Centre（欧洲空间研究与技术中心）；Universitá degli studi di Milano-Bicocca（米兰比可卡大学）
Investigating the Stellar Mass Growth Histories of Satellite Galaxies as a Function of Infall Time using Phase-Space
我们编译了一个大样本的附近星系的卫星主机使用一个众所周知的SDSS组目录。从这个样本中，我们创建了一个“古代infallers”和“最近infallers”子样本，根据宇宙学模拟预测的星系在相空间中的位置的平均下落时间。我们比较了这两个子样本中星系的恒星质量增长历史，从多波长SED拟合，使用来自宇宙学模拟的恒星形成历史形状的综合库确定。通过同时控制卫星恒星质量和宿主晕质量，我们可以清楚地看到在宿主中度过的时间的影响。正如我们可能预测的那样，古老的infaller人口显示出明显的早期淬火迹象，特别是对于更大质量的宿主中的低质量卫星。更重要的是，我们发现这种影响不仅限于大型主机。我们发现，主机可能被认为是低质量的集团（晕质量$\sim$ 10 $^{13}$ M $_\odot$）可以显着改变他们的卫星，即使是大质量的卫星（恒星质量$\sim$ 10 $^{10}$ M $_\odot$）。有趣的是，我们看到早在8或9 Gyr前，星系团卫星的质量增长历史就发生了变化，当时它们还没有进入当前宿主的维里半径。我们认为，这可能是由于星系被预处理在低质量的子结构在原星系团的郊区，之前的下跌。
The DECam MAGIC Survey $-$ Mapping the Ancient Galaxy in CaHK: Overview and Summary of Early Science
Kavli Institute for Particle Astrophysics & Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；Kavli Institute for Cosmological Physics, University of Chicago（芝加哥大学卡弗里宇宙物理学研究所）；Department of Astronomy & Astrophysics, University of Chicago（芝加哥大学天文与天体物理系）；NSF-Simons AI Institute for the Sky (SkAI)（NSF-Simons天空人工智能研究所）；Department of Astronomy, University of Virginia（弗吉尼亚大学天文学系）；Department of Astronomy, Yale University（耶鲁大学天文学系）；Universidade de São Paulo, Instituto de Astronomia, Geofísica e Ciências Atmosféricas（圣保罗大学天文、地球物理与大气科学学院）；Instituto de Alta Investigación, Universidad de Tarapacá（塔拉帕卡大学高级研究所）
No country for old stars -Spectroscopic confirmation of the first intermediate-age RR Lyrae in the open cluster Trumpler 5
University of Rome Tor Vergata（罗马托尔维加塔大学）；INAF – Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；Universidad de la República（乌拉圭共和国大学）；Universitat de Barcelona（巴塞罗那大学）；Monash University（蒙纳士大学）；European Southern Observatory（欧洲南方天文台）；Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences（波兰科学院尼古拉·哥白尼天文学中心）；INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna（意大利国家天体物理研究所博洛尼亚天体物理学与空间科学观测站）；Institute of Astronomy, Russian Academy of Sciences（俄罗斯科学院天文学研究所）；INAF - Osservatorio Astronomico di Padova（意大利国家天体物理研究所帕多瓦天文台）；Leibniz-Institut für Astrophysik Potsdam（波茨坦莱布尼茨天体物理研究所）
ODIN: Confirmation and 3D Reconstruction of Six Massive Protoclusters at Cosmic Noon
Purdue University（普渡大学）；NSF NOIRLab（美国国家光学-红外天文研究实验室）；Arizona State University（亚利桑那州立大学）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；Boston University（波士顿大学）；Universidad Andres Bello（安德烈斯贝略大学）；Università degli Studi di Milano（米兰大学）；INAF-Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）
Dynamical properties and star formation history of a low-mass quenched galaxy at Cosmic Noon
Cosmic Dawn Center (DAWN)（宇宙黎明中心）；DTU Space, Technical University of Denmark（丹麦技术大学空间研究所）；DARK, Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）；Department of Astronomical Science, The Graduate University for Advanced Studies, SOKENDAI（国立天文台高等研究院天文学研究科）；National Astronomical Observatory of Japan（日本国立天文台）；ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)（ARC三维全天空天体物理学卓越中心）；Subaru Telescope（昴星团望远镜）
The HST Legacy Archival Uniform Reduction of Local Group Imaging (LAURELIN). I. Photometry and Star Formation Histories for 36 Ultra-faint Dwarf Galaxies
DeepDive: Simultaneous Formation of Massive Quiescent Galaxies in High-Redshift Galaxy Overdensities
The Graduate University for Advanced Studies, SOKENDAI（高级研究大学）；National Astronomical Observatory of Japan（日本国立天文台）；DTU Space, Technical University of Denmark（丹麦技术大学空间科学中心）；Cosmic Dawn Center (DAWN)（宇宙黎明中心）；Institute for Cosmic Ray Research, The University of Tokyo（东京大学宇宙射线研究所）；Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所）
Overdense fireworks in GOODS-N: Unveiling a record number of massive dusty star forming galaxies at z$\sim$5.2 with the N2CLS
Aix Marseille Univ, CNRS, CNES, LAM (Laboratoire d’Astrophysique de Marseille)（艾克斯马赛大学）；Department of Astronomy, University of Geneva（日内瓦大学天文学系）；Institut de Radioastronomie Millimétrique (IRAM)（毫米波射电天文研究所）；Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange（蔚蓝海岸大学）；School of Physics and Astronomy, Cardiff University（卡迪夫大学物理与天文学学院）；Université Paris Cité, Université Paris-Saclay, CEA, CNRS, AIM（巴黎西岱大学、巴黎萨克雷大学）
