Deep ASKAP EMU Survey of the GAMA23 field: Properties of radio sources
Gülay Gürkan, I. Prandoni, A. O'Brien, W. Raja, L. Marchetti, M. Vaccari, S. Driver, E. Taylor, T. Franzen, M. J. I. Brown, S. Shabala, H. Andernach, A. M. Hopk… 展开作者
Gülay Gürkan, I. Prandoni, A. O'Brien, W. Raja, L. Marchetti, M. Vaccari, S. Driver, E. Taylor, T. Franzen, M. J. I. Brown, S. Shabala, H. Andernach, A. M. Hopkins, R. P. Norris, D. Leahy, M. Bilicki, H. Farajollahi, T. Galvin, G. Heald, B. S. Koribalski, T. An, K. Warhurst
We present the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the Galaxy and Mass Assembly (GAMA)-23h field. The survey was carried out at 887.5 MHz and covers a 83 square degree field. We imaged the calibrated visibility data, taken as part of the Evolutionary Mapping of Universe (EMU) Early Science Programme, using the latest version of the ASKAPSoft pipeline. The final mosaic has an angular resolution of 10 arcsec and a central rms noise of around 38 $μ$Jy beam$^{-1}$. The derived radio source catalogue has 39812 entries above a peak flux density threshold of 5$σ$. We searched for the radio source host galaxy counterparts using the GAMA spectroscopic (with an i-band magnitude limit of 19.2 mag) and multi-wavelength catalogues that are available as part of the collaboration. We identified hosts with GAMA spectroscopic redshifts for 5934 radio sources. We describe the data reduction, imaging, and source identification process, and present the source counts. Thanks to the wide area covered by our survey, we obtain very robust counts down to 0.2 mJy. ASKAP's exceptional survey speed, providing efficient, sensitive and high resolution mapping of large regions of the sky in conjunction with the multi-wavelength data available for the GAMA23 field, allowed us to discover 63 giant radio galaxies. The data presented here demonstrate the excellent capabilities of ASKAP in the pre-SKA era.
The life of central radio galaxies in clusters: AGN-ICM studies of eRASS1 clusters in the ASKAP fields
The University of Western Australia（西澳大学）；Macquarie University（麦考瑞大学）；Keele University（基尔大学）；Beijing Normal University（北京师范大学）；Leiden University（莱顿大学）；University of Minnesota（明尼苏达大学）；University of Tasmania（塔斯马尼亚大学）
ASKAP EMU detection of an Odd Radio Circle (ORC) candidate: J094412-751016 (Anglerfish)
Western Sydney University（西悉尼大学）；Dominion Radio Astrophysical Observatory, Herzberg Astronomy & Astrophysics, National Research Council Canada（加拿大国家研究委员会赫茨伯格天体与天体物理学部多米农射电天文台）；Mizusawa VLBI Observatory, National Astronomical Observatory Japan（日本国立天文台水泽VLBI观测站）；INAF-Osservatorio Astrofisico di Catania（意大利国家天体物理研究所卡塔尼亚天文台）；Australia Telescope National Facility, CSIRO（澳大利亚望远镜国家设施，CSIRO）；Department of Physics, University of Wisconsin-Madison（威斯康星大学麦迪逊分校物理系）
An ASKAP survey for HI absorption towards dust-obscured quasars
类星体被吸积的气体和尘埃遮蔽，或者被尘埃干扰的星系遮蔽，会导致活动星系核（AGN）在光学选择的巡天中被遗漏。无线电观测可以克服这种尘埃偏见。特别是，无线电调查寻找HI吸收通知我们如何AGN可以影响到冷的中性气体介质内的主星系，或通过观察到的视线气体运动学的干预星系的人口。本文介绍了利用澳大利亚SKA探路者（ASKAP）试运行阵列在$0.4 < z < 1$对34个遮蔽类星体进行HI吸收线测量的结果。我们检测到三个HI吸收线，其中一个系统以前未知。通过对两个源的光学跟踪，我们发现在所有的探测中HI气体都与活动星系核有关，因此这些活动星系核被其宿主星系内的物质所遮蔽。我们的大多数样本都是紧凑的，此外，要么是千兆赫兹峰值频谱（GPS），或陡峭的频谱（CSS）源，都被认为是年轻的或最近重新触发的无线电活动星系核。我们的样本的无线电频谱能量分布分类同意星系演化模型中，模糊AGN最近才变得活跃。我们相关联的HI检测率的GPS和紧凑的SS源相匹配的其他调查对这些来源。我们还发现了浅的和不对称的HI吸收特征，这与以前的研究结果一致，即致密射电星系中的冷中性介质通常受到活动星系核的运动学扰动。
A FLASH HI absorption search in compact sources in the pilot ASKAP interplanetary scintillation field
ATNF, CSIRO Space and Astronomy（CSIRO空间与天文台）；Korea Astronomy and Space Science Institute（韩国天体宇宙科学研究所）；First Light Fusion Ltd.（第一束聚变有限公司）；Institute for Astronomy, University of Edinburgh（爱丁堡大学天体物理研究所）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理学研究所）
A sample of short-lived Galactic radio transients from ASKAP VAST
University of North Carolina at Chapel Hill（北卡罗来纳大学教堂山分校）；University of Wisconsin-Milwaukee（威斯康星大学密尔沃基分校）；Curtin University（科廷大学）；California Institute of Technology（加州理工学院）；Carnegie Institution for Science（卡内基科学研究所）；University of Sydney（悉尼大学）
The ASKAP-FLASH survey: A first look at the multiwavelength properties and redshift distribution of compact radio sources
Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理学研究所）；Sydney Institute for Astronomy, School of Physics A28, University of Sydney（悉尼大学物理A28学院天体物理研究所）；ATNF, CSIRO, Space and Astronomy（CSIRO空间与天文台）；Institute for Data Innovation in Science, Seoul National University（首尔大学数据创新科学研究所）；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）；First Light Fusion Ltd.（第一缕光融合有限公司）
ASKAP discovery of a pair of large radio bubbles: on the origin of odd radio circles
Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；Research School of Astronomy and Astrophysics (RSAA), Australian National University（澳大利亚国立大学天文学与天体物理学研究学院）；INAF - Osservatorio Astronomico di Roma（意大利国家天体物理研究所罗马天文台）；School of Physics, Henan Normal University（河南师范大学物理学院）；Department of Physics and Institute of Theoretical Physics, Nanjing Normal University（南京师范大学物理系和理论物理研究所）
EMU: Cross-correlating EMU Pilot Survey 1 with Dark Energy Survey to validate the radio galaxy bias and redshift distribution
Korea Astronomy and Space Science Institute（韩国天文学与宇宙学研究所）；Universidad de Zaragoza（萨拉戈萨大学）；University of Edinburgh（爱丁堡大学）；INAF – Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Torino（意大利国家天体物理研究所都灵天文台）；Center for Theoretical Physics PAS（波兰科学院理论物理中心）；Università degli Studi di Torino（都灵大学）；Macquarie University（麦考瑞大学）；University of Oxford（牛津大学）
A search for HI absorption in distant star-forming galaxies with ASKAP-FLASH - II. Direct observations and stacking of 21 cm line
E. A. Milne Centre for Astrophysics, University of Hull（赫尔大学 E.A. 米尔天体物理中心）；Sydney Institute for Astronomy, School of Physics A28, University of Sydney（悉尼大学物理学院A28悉尼天文研究所）；ATNF, CSIRO Space and Astronomy（CSIRO空间与天文台顶射电天文）；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 (ASTRO 3D)）；School of Chemical and Physical Sciences, Victoria University of Wellington（惠灵顿维多利亚大学化学与物理科学学院）；Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester（曼彻斯特大学物理与天文学院乔德雷尔银行天体物理中心）；United Kingdom SKA Regional Centre (UKSRC), University of Manchester（曼彻斯特大学英国SKA区域中心 (UKSRC)）；ASTRON – Netherlands Institute for Radio Astronomy（荷兰射电天文研究所 ASTRON）
Extended Radio Galaxies in EMU: A Comparative Look at Source-Finding Techniques
Macquarie University（麦考瑞大学）；University of Wisconsin-Madison（威斯康星大学麦迪逊分校）；Australia Telescope National Facility, CSIRO（澳大利亚望远镜国家设施，CSIRO）；University of Queensland（昆士兰大学）；Thüringer Landessternwarte（图林根州立天文台）；Monash University（蒙纳士大学）；University of Hawai‘i at Mānoa（夏威夷大学马诺阿分校）；University of Tasmania（塔斯马尼亚大学）；South African Astronomical Observatory (SAAO)（南非天文台）
A radio counterpart of the local little-red-dot J092359+415736
University of Science and Technology of China（中国科学技术大学）；University of Massachusetts Amherst（马萨诸塞大学阿默斯特分校）；Yunnan Observatories, Chinese Academy of Sciences（中国科学院云南天文台）
The Rapid ASKAP Continuum Survey (RACS) VIII: total intensity and circular polarization images and catalogues at 887.5 MHz from RACS-low2
CSIRO Space and Astronomy（CSIRO空间与天文学）；Sydney Institute for Astronomy, School of Physics, The University of Sydney（悉尼大学物理学院悉尼天文研究所）；Australian SKA Regional Centre (AusSRC), Curtin University（科廷大学澳大利亚SKA区域中心）；SKA Observatory, SKA-Low Science Operations Centre（SKA天文台SKA低频科学运营中心）
The Rapid ASKAP Continuum Survey VII: Spectra and Polarisation In Cutouts of Extragalactic Sources (SPICE-RACS) Second Data Release -- Unveiling the Magnetised Sky
SKA Observatory, SKA-Low Science Operations Centre（SKA 天文台，SKA-Low 科学运营中心）；ATNF, CSIRO Space & Astronomy（CSIRO 空间与天文学部 ATNF）；CSIRO Information Management & Technology（CSIRO 信息管理与技术部）；Departamento de Física de la Tierra y Astrofísica & IPARCOS-UCM, Universidad Complutense de Madrid（马德里康普顿斯大学地球物理与天体物理学系及 IPARCOS-UCM）；Research School of Astronomy & Astrophysics, The Australian National University（澳大利亚国立大学天文学与天体物理学研究学院）；Dunlap Institute for Astronomy and Astrophysics, University of Toronto（多伦多大学邓普勒天文学与天体物理学研究所）
The MeerKAT 1.3 GHz survey of the Large Magellanic Cloud: Point Source Catalogue
Western Sydney University（西悉尼大学）；National Radio Astronomy Observatory（美国国家射电天文台）；South African Radio Astronomy Observatory (SARAO)（南非射电天文台）；Keele University（基尔大学）
