We report optical VLT FORS2 spectroscopy of the two Ly-alpha emitters (LAEs) companions to the quasi-stellar object (QSO) - sub-millimetre galaxy (SMG) system BRI1202-0725 at z = 4.7, which have recently been detected in the [CII]158um line by the Atacama Large Millimetre/Sub-millimetre Array (ALMA). We detect Ly-alpha emission from both sources and so confirm that these Ly-alpha emitter candidates are physically associated with the BRI1202- 0725 system. We also report the lack of detection of any high ionisation emission lines (N V, Si IV, C IV and He II) and find that these systems are likely not photoionised by the quasar, leaving in situ star formation as the main powering source of these LAEs. We also find that both LAEs have Ly-alpha emission much broader (1300 km/s) than the [CII] emission and broader than most LAEs. In addition, both LAEs have roughly symmetric Ly-alpha profiles implying that both systems are within the HII sphere produced by the quasar. This is the first time that the proximity zone of a quasar is probed by exploiting nearby Ly-alpha emitters. We discuss the observational properties of these galaxies in the context of recent galaxy formation models.
The ALMA Spectroscopic Survey in the HUDF: A Search for [CII] Emitters at $6 \leq z \leq 8$
哈勃超深场(ASPECS)波段6扫描(212-272 GHz)的ALMA光谱巡天覆盖了整个2.9弧分$^2$区域内$6\leq z \leq8$星系中潜在的[CII]发射。通过选择已知的莱曼- $α$发射体(LAEs)和光度缺失星系,我们进行了有针对性的搜索到5 $σ$ [CII]光度深度$L_{\mathrm{[CII]}}\sim2.0\times10^8$ L $_{\odot}$,大致对应于恒星形成率(SFR)的$10$ - $20$ M $_{\odot}$ yr $^{-1}$时,应用本地校准转换的恒星形成星系,产生零检测。虽然该样本中的大多数星系的特征是较低的SFR,但这些来源中[CII]光度的上限与$z=6$ - $7$ LAEs和Lyman-break星系(LBG)的目标ALMA观测的当前文献样本以及$L_{\mathrm{[CII]}}$和SFR之间的局部校准关系一致-除了单个[CII]不足的紫外发光LBG。我们还进行了盲目的搜索[CII]-明亮的星系,可能已经错过了光学选择,导致的上限与$L_{\mathrm{[CII]}}>2.0\times10^8$ L $_{\odot}$($5σ$)的[CII]源的累积数密度小于$1.8\times10^{-4}$兆位数$^{-3}$(90%的置信水平)。在这个光度深度和体积覆盖率,我们提出了一个观察到的[CII]光度…
ALMA Lensing Cluster Survey: Molecular Gas Properties of Line-Emitting Galaxies from a Blind Survey
The University of Tokyo(东京大学);National Astronomical Observatory of Japan, National Institutes of Natural Sciences(日本国立天文台,国立自然科学研究院);National Astronomical Observatory of Japan(日本国立天文台);SOKENDAI(综合研究大学院大学);University of Toronto(多伦多大学);Dunlap Institute for Astronomy and Astrophysics(邓普天文学与天体物理学研究所);Cosmic Dawn Center (DAWN)(宇宙黎明中心);DTU Space, Technical University of Denmark(丹麦技术大学空间科学中心);Kyoto University(京都大学);Chiba University(千叶大学);The University of Texas at Austin(德克萨斯大学奥斯汀分校);Nagoya University(名古屋大学);Space Telescope Science Institute(太空望远镜科学研究所);Max Planck Institute for Exterrestrial Physics(马克斯·普朗克地外物理研究所);University of Groningen(格罗宁根大学);University of Geneva(日内瓦大学);Academia Sinica(中央研究院)
FIR-luminous [CII] emitters in the ALMA-SCUBA-2 COSMOS survey (AS2COSMOS): The nature of submillimeter galaxies in a 10 comoving Mpc-scale structure at z~4.6
我们报告了一个10百万分之一秒尺度的结构跟踪的大质量亚毫米星系(SMG)在z~4.6。这些星系是从ALMA波段7观测的发射线搜索中选出的,目标是184个发光的亚毫米源($S_{850μ{\rm m}}\geq$ 6.2 mJy),横跨1.6度$^2$在COSMOS领域。我们在z=4.60-4.64处识别出四个[CII]发射SMG和两个可能的[CII]发射SMG候选者,其中速度积分信噪比SNR>8。六个发射器中有四个是近红外空白SMG。在排除了一个SMG的发射线是在光谱窗口的边缘下降,所有的星系都显示出清晰的速度梯度沿主轴是一致的旋转气体盘。估计的磁盘的旋转速度为330-550公里秒$^{-1}$和推断的主机暗物质晕质量为~2-8 $\times$ 10 $^{12}$ M $_{\odot}$。从它们的晕质量和[CII]光度函数估计,我们认为,这些星系有一个高(50-100%)的占空比和高(~0.1)的重子转换效率(SFR相对于重子吸积率),它们的贡献$\simeq$ 2%的总恒星形成率密度在z=4.6。这些SMG仅集中在整个调查量的0.3%内,表明它们具有很强的集群性。这种结构的范围和单个晕质量表明,这些SMG可能会演变成一个约10 $^{15}$ M $_{\odot}$集群在z=0的成员。这项调查揭示了z>4的大质量晕中的同步尘埃星暴,这可能是由合并驱动的,也可能是由平滑的气…
Constraining reionization with persistent homology: a novel summary statistic for wide-field Lyman-$α$ emitter observations
University of California, Los Angeles(加州大学洛杉矶分校);Scuola Normale Superiore(比萨高等师范学院);University of Tsukuba(筑波大学);The University of Tokyo(东京大学);Institute for Cosmic Ray Research, The University of Tokyo(东京大学宇宙射线研究所);University of Catania(卡塔尼亚大学);National Astronomical Observatory of Japan, National Institutes of Natural Sciences(日本国立天文台,国立自然科学研究院);SOKENDAI (The Graduate University for Advanced Studies)(综合研究大学院大学);Kavli Institute for the Physics and Mathematics of the Universe (WPI)(宇宙物质与物理学 Kavli 研究所)
Synthetic Modelling of Polarized Dust Emission in Intermediate-Mass YSOs: I: Constraining the Role of Iron Inclusions and Inelastic Relaxation on Grain Alignment with ALMA Polarization
The Pristine HeII Emitter near GN-z11: Constraining the Mass Distribution of the First Stars
Università degli Studi di Firenze(佛罗伦萨大学);INAF/Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切尔奇天文台);Kavli Institute for Cosmology, University of Cambridge(剑桥大学卡弗里宇宙学研究所);Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室);Department of Physics and Astronomy, University College London(伦敦大学学院物理与天文系);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);Scuola Normale Superiore(比萨高等师范学院);Max-Planck-Institut für extraterrestrische Physik(马克斯·普朗克地外物理研究所)
The ALMA Spectroscopic Survey in the HUDF: Constraining the Molecular Content at $\log{(M_*/M_\odot)} \sim 9.5$ with CO stacking of MUSE detected $z\sim1.5$ Galaxies
The ALMA Spectroscopic Survey in the HUDF: Constraining cumulative CO emission at $1 \lesssim z \lesssim 4$ with power spectrum analysis of ASPECS LP data from 84 to 115 GHz
我们提出了一个功率谱分析的ALMA光谱测量大型计划(ASPECS LP)的数据从84到115 GHz。这些数据主要探测小尺度波动($k=10$ - $100$ h Mpc $^{-1}$)在星系中的CO排放总量在$1 \lesssim z \lesssim 4$。我们放置一个积分约束CO光度函数(LF)在这个红移范围内,通过直接测量其在三维(3D)自功率谱的二阶矩,找到一个总CO散粒噪声功率$P_{\textrm{CO,CO}}(k_{\textrm{CO(2-1)}}) \leq 1.9\times10^2$ $μ$ K $^2$(Mpc h $^{-1}$)$^3$。该上限($3σ$)与Decarli等人2019年观察到的ASPECS CO LF一致,但排除了从这些LF推断的$P_{\textrm{CO,CO}}(k_{\textrm{CO(2-1)}})$范围内的较大空间,我们将其主要归因于$z > 2$处Schechter型CO LF的归一化$Φ_*$和膝关节$L_*$的较大不确定性。此外,通过功率谱分析的ASPECS LP数据与415个位置的可用的光学光谱红移的星系,我们发现,所观察到的平均CO强度和散粒噪声功率的MUSE星系的贡献主要是由ASPECS盲检测,虽然有$\sim20$ %的贡献CO(2-1)的平均强度由于源先前未检测到的盲线搜索。最后,我们从个人的盲目CO检…
ALMA-JELLY II. Constraining the radial profiles of the quenching timescales in ram-pressure-stripped galaxies
Università di Milano-Bicocca(米兰比可卡大学);INAF - Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);Aix Marseille Univ, CNRS, CNES, LAM(艾克斯-马赛大学、法国国家科学研究中心、法国国家空间研究中心、天体物理与行星学实验室);INAF - Osservatorio Astronomico di Cagliari(意大利国家天体物理研究所卡利亚里天文台);INAF - Osservatorio Astronomico di Trieste(意大利国家天体物理研究所的里雅斯特天文台);Yale University(耶鲁大学);Astronomical Institute of the Czech Academy of Sciences(捷克科学院天文研究所);The University of Alabama in Huntsville(阿拉巴马大学亨茨维尔分校);University of Hertfordshire Centre for Astrophysics Research(赫特福德大学天体物理学研究中心);Observatoire de Paris, LUX, Collège de France, CNRS, PSL University, Sorbonne Uni(巴黎天文台、卢克瑟姆实验室、法兰西学院、法国国家科学研究中心、巴黎文理研究大学、索邦大学)
Comprehensive JWST+ALMA Study on the Extended Ly$α$ Emitters, Himiko and CR7 at $z\sim 7$: Blue Major Merger Systems in Stark Contrast to Submillimeter Galaxies
The Graduate University for Advanced Studies, SOKENDAI(高级研究大学院大学);National Astronomical Observatory of Japan(日本国立天文台);Institute for Cosmic Ray Research, The University of Tokyo(东京大学宇宙射线研究所);Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo(东京大学 Kavli 宇宙物理数学研究所);Department of Astronomy, Graduate School of Science, the University of Tokyo(东京大学理学研究科天文学专攻);Department of Physics, The University of Tokyo(东京大学物理学系);Center for Computational Astrophysics, Flatiron Institute(西蒙斯基金会平顿研究所计算天体物理中心);Center for Computational Sciences, University of Tsukuba(筑波大学计算科学中心);University of Toronto(多伦多大学);Dunlap Institute for Astronomy and Astrophysics(邓普勒天文与天体物理研究所);Kanazawa University(金泽大学);Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo(东京大学大学院综合文化研究科一般系统研究专攻);Institute of Astronomy, Graduate School of Science, The University of Tokyo(东京大学理学研究科天文学专攻天文学研究所);Research Center for the Early Universe, Graduate School of Science, The University of Tokyo(东京大学理学研究科宇宙早期现象研究中心)
High-Resolution ALMA Imaging for a Gravitationally-lensed Quasar at $z=6.5$: Constraining the AGN Contribution to Galactic-Scale Dust Heating
University of Arizona(亚利桑那大学);MIT Kavli Institute for Astrophysics and Space Research(麻省理工学院卡弗里天体物理与空间研究所);University of Michigan(密歇根大学);Newcastle University(纽卡斯尔大学);Peking University(北京大学)
Stacking 21-cm Maps around Lyman-$α$ Emitters during Reionization: Prospects for a Cross-correlation Detection with the Hydrogen Epoch of Reionization Array
The JWST Emission Line Survey (JELS): Multi-wavelength properties of Paschen line-emitters at Cosmic Noon
Instituto de Física y Astronomía, Universidad de Valparaíso(瓦尔帕莱索大学物理与天文学研究所);Millennium Nucleus for Galaxies (MINGAL)(银河系千年核);Institute for Astronomy, University of Edinburgh(爱丁堡大学天文研究所);Jodrell Bank Centre for Astrophysics, University of Manchester(曼彻斯特大学乔德雷尔银行天体物理学中心);Institute of Science and Technology Austria (IS(奥地利科学与理工学院)
JWST PRIMER: A deep JWST study of all ALMA-detected galaxies in PRIMER COSMOS -- dust-obscured star-formation history back to z $\simeq$ 7
Institute for Astronomy, University of Edinburgh(爱丁堡大学天文研究所);Centro de Astrobiología (CAB), CSIC-INTA(天体生物学中心(CAB),西班牙国家研究委员会-国家航空航天技术研究所);Department of Physics & Astronomy, University College London(伦敦大学学院物理与天文学系);Space Telescope Science Institute(太空望远镜科学研究所);Department of Astronomy and Astrophysics, UCO/Lick Observatory, 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、UCO/莱克天文台);INAF - Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Jodrell Bank Centre for Astrophysics, Department of Physics & Astronomy, School of Natural Sciences, The University of Manchester(曼彻斯特大学自然科学学院物理与天文学系乔德雷尔银行天体物理中心)