JWST EXCELS调查：1.5 < z < 5静止和最近熄灭的星系中的出流很可能来自间歇性AGN活动的遗迹
The JWST EXCELS survey: Outflows in 1.5 < z < 5 quiescent and recently quenched galaxies are likely relics from episodic AGN activity
University of Edinburgh（爱丁堡大学）；University of Nottingham（诺丁汉大学）；Universidad de Sevilla（塞维利亚大学）；University of St Andrews（圣安德鲁斯大学）；University of California, Los Angeles（加州大学洛杉矶分校）
Elizabeth Taylor, Adam C. Carnall, David Maltby, Omar Almaini, Ho-Hin Leung, Struan D. Stevenson, Andrea Negri, Fergus Cullen, Vivienne Wild, Ross J. McLure, Al… 展开作者
Elizabeth Taylor, Adam C. Carnall, David Maltby, Omar Almaini, Ho-Hin Leung, Struan D. Stevenson, Andrea Negri, Fergus Cullen, Vivienne Wild, Ross J. McLure, Alice E. Shapley, Karla Z. Arellano-Córdova, Ryan Begley, Cecilia Bondestam, Thomas de Lisle, Callum T. Donnan, James S. Dunlop, Richard Ellis, Guillaume Hewitt, Anton M. Koekemoer, Feng-Yuan Frey Liu, Derek J. McLeod, Kate Rowlands, Ryan L. Sanders, Dirk Scholte, Maya Skarbinski, Thomas M. Stanton
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22 pages, 12 figures. Accepted for publication in MNRAS
We investigate the presence and origin of neutral gas outflows and inflows in 13 post-starburst (PSB) and quiescent galaxies at redshifts 1.8 $\leq$ z $\leq$ 4.6, using JWST NIRSpec spectroscopy from the EXCELS survey. NaD absorption profiles reveal that 3 out of 13 exhibit blueshifted absorption indicative of outflows, and a further 2 objects show signs of inflowing gas. Outflow velocities range from $\approx$ 300 - 1200 kms$^{-1}$, and we find gas flows are detected exclusively in objects that quenched $\lt$ 600 Myr ago. This result holds when we include comparable objects from recent literature. We derive mass outflow rates over two orders of magnitude higher than current levels of star formation in our sample, indicating that the winds are unlikely to be driven by supernovae, and likely play a significant role in keeping the galaxies quenched. The majority of the outflow sample have anomalously high energy and momentum outflow rates compared to those predicted for current levels of star formation or AGN activity. We conclude that we are likely observing fossil outflows driven by previous, more luminous AGN activity which has since faded. We then compare with the EAGLE simulation to explore a potential 'outflow cycle', finding that our observations are consistent with a model in which z $\sim$ 3 quiescent galaxies undergo short $\simeq$ 5 Myr periods of AGN activity strong enough to drive outflows, which occur every $\simeq$ 40 Myr on average. This AGN activity drives observable outflows that persist for up to $\simeq$ 10 Myr after the AGN fades, followed by a $\simeq$ 20 Myr lull, and a subsequent short inflow, which eventually re-ignites AGN activity, and the cycle repeats.
The JWST EXCELS survey: The ages and abundances of $3<z<5$ massive quiescent galaxies show that downsizing was already in place by $z\simeq4$
SUPA, Institute for Astronomy, University of Edinburgh（爱丁堡大学天体物理联盟）；Department of Astronomy, University of California, Berkeley（加州大学伯克利分校天文系）；Armagh Observatory and Planetarium（阿马赫天文馆和天文台）
Resolved Maps of Gas and Dust in a Massive Quiescent Galaxy at z=2 from INQUEST-JWST: Evidence of Accretion and Rejuvenation
Observatories of the Carnegie Institution for Science（卡内基科学研究所天文台）；Department of Astronomy, Tsinghua University（清华大学天文系）；Dipartimento di Fisica e Astronomia (DIFA), Università di Bologna（博洛尼塔大学物理与天文学系）；Department of Astronomy, University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校天文系）；Cosmic Dawn Center (DAWN)（宇宙黎明中心）；Centre for Astrophysics and Supercomputing, Swinburne University of Technology（斯威本科技大学天体物理与超级计算中心）
We report a robust sample of 10 massive quiescent galaxies at redshift, $z > 3$, selected using the first data from the JWST CEERS programme. Three of these galaxies are at $4 < z < 5$, constituting the best evidence to date for quiescent galaxies significantly before $z=4$. These extreme galaxies have stellar masses in the range log$_{10}(M_*/$M$_\odot) = 10.1-11.1$, and formed the bulk of their mass around $z \simeq 10$, with two objects having star-formation histories that suggest they had already reached log$_{10}(M_*/$M$_\odot) > 10$ by $z\gtrsim8$. We report number densities for our samp…
RUBIES spectroscopically confirms the high number density of quiescent galaxies from $\mathbf{2<z<5}$
University of Pittsburgh（匹兹堡大学）；Max-Planck-Institut für Astronomie（马克斯·普朗克天文学研究所）；Princeton University（普林斯顿大学）；Space Telescope Science Institute（太空望远镜科学研究所）；International Centre for Radio Astronomy Research (ICRAR)（国际射电天文研究中心）；University of Western Australia（西澳大利亚大学）；University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校）；University of Wisconsin-Madison（威斯康星大学麦迪逊分校）；The Pennsylvania State University（宾夕法尼亚州立大学）
We present the galaxy size-mass ($R_{e}-M_{\ast}$) distributions using a stellar-mass complete sample of $\sim1.5$ million galaxies, covering $\sim100$ deg$^2$, with $\log(M_{\ast}/M_{\odot})>10.2~(9.2)$ over the redshift range $0.2<z<1.0$ $(z<0.6)$ from the second public data release of the Hyper Suprime-Cam Subaru Strategic Program. We confirm that, at fixed redshift and stellar mass over the range of $\log(M_{\ast}/M_{\odot})<11$, star-forming galaxies are on average larger than quiescent galaxies. The large sample of galaxies with accurate size measurements, thanks to the excellent imaging…
First detection of ultra-fast outflows in a quiescent galaxy
Institute of Space Sciences (ICE, CSIC)（空间科学研究所）；Institut d’Estudis Espacials de Catalunya (IEEC)（加泰罗尼亚空间研究学院）；Instituto de Astrofísica de Canarias (IAC)（加那利天体物理研究所）；Universidad de La Laguna (ULL)（拉帕鲁纳大学）；Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）；INAF - IASF Palermo（意大利国家天体物理研究所巴勒莫分所）；The Catholic University of America（美利坚天主教大学）；INAF, Osservatorio Astronomico di Brera（意大利国家天体物理研究所布拉耶天文台）；Università degli Studi Roma Tre（罗马第三大学）
There and back again? Neutral outflows in z~3.5 quiescent galaxies
Cosmic Dawn Center (DAWN)（黎明中心）；DTU Space, Technical University of Denmark（丹麦技术大学空间部）；INAF-Osservatorio Astrofisico di Arcetri（意大利国家天体物理研究所阿切特里天文台）；Department of Astronomy, University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校天文学系）；The Graduate University for Advanced Studies, SOKENDAI（日本综合研究大学院大学）；National Astronomical Observatory of Japan（日本国立天文台）；DARK, Niels Bohr Institute, University of Copenhagen（哥本哈根大学尼尔斯·玻尔研究所暗物质研究中心）
The Nature of High-Redshift Massive Quiescent Galaxies -- Searching for RUBIES-UDS-QG-z7 in FLARES
University of Sussex（苏塞克斯大学）；University of Portsmouth（朴茨茅斯大学）；University of Malta（马耳他大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）
A new class of quiescent galaxies harboring possible AGN-driven winds has been discovered using spatially resolved optical spectroscopy from the ongoing SDSS-IV MaNGA survey. These galaxies, termed "red geysers", constitute $5-10\%$ of the local quiescent population and are characterized by narrow bisymmetric patterns in ionized gas emission features. Cheung et al. argued that these galaxies host large-scale AGN-driven winds that may play a role in suppressing star formation at late times. In this work, we test the hypothesis that AGN activity is ultimately responsible for the red geyser pheno…
The JWST EXCELS survey: Insights into the nature of quenching at cosmic noon
Johns Hopkins University（约翰斯·霍普金斯大学）；Space Telescope Science Institute（太空望远镜科学研究所）；University of St Andrews（圣安德鲁斯大学）；University of Edinburgh（爱丁堡大学）；University of Nottingham（诺丁汉大学）
The connection between halo gas acquisition through the circumgalactic medium (CGM) and galaxy star formation has long been studied. In this series of two papers, we put this interplay within the context of the galaxy environment on large scales (several hundreds of kpc), which, to a certain degree, maps out various paths for galaxy interactions. We use the IllustrisTNG-100 simulation to demonstrate that the large-scale environment modulates the circumgalactic gas angular momentum, resulting in either enhanced (Paper I) or suppressed (Paper II) star formation inside a galaxy. In this paper (Pa…
We present the results of a systematic search for molecular outflows in 68 Very Low Luminosity Objects (VeLLOs) from single-dish observations in CO isotopologues which find 16 VeLLOs showing clear outflow signatures in the CO maps. With additional three VeLLOs from the literature, we analyzed the outflow properties for 19 VeLLOs, identifying 15 VeLLOs as proto-Brown Dwarf (BD) candidates and four VeLLOs as likely faint protostar candidates. The proto-BD candidates are found to have a mass accretion rate ($\sim 10^{-8} - 10^{-7}$ $\rm M_{\odot}$ yr$^{-1}$) lower than that of the protostar candi…
BayeSED-GALAXIES II. Bayesian full spectrum analysis of galaxies and application in the CSST wide-field slitless spectroscopy survey
International Centre of Supernovae (ICESUN), Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences (CAS)（中国科学院云南天文台）；Center for Astronomical Mega-Science, Chinese Academy of Sciences（中国科学院国家天文台）；Tsung-Dao Lee Institute and State Key Laboratory of Dark Matter Physics, Shanghai Jiao Tong University（上海交通大学李政道研究所）；Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）
The Subaru Hyper Suprime-Cam (HSC) Strategic Survey is the latest-generation multi-band optical imaging survey for galaxy evolution and structure formation. The "Ultra-Deep" component of the HSC survey provides $grizy$ broad-band images over $\sim3.4$ deg$^2$ to detection limits of $\sim26$-28 AB, along with narrow-band images, in the COSMOS and the SXDS fields. These images provide an unprecedented combination of depths and area coverage, for the studies galaxies up to $z\sim7$. However, the lack of coverage at $<4000$ Ang implies incomplete sampling of the rest-frame UV at $z\lesssim 3$, whi…
Detection of a parsec-scale, compact, and fading ejecta from an accreting massive black hole
Xinjiang Astronomical Observatory, CAS（中国科学院新疆天文台）；University of Chinese Academy of Sciences（中国科学院大学）；Chalmers University of Technology（查尔姆斯理工大学）；Onsala Space Observatory（翁萨拉太空观测站）；Peking University（北京大学）
