弯尾射电星系(BTRGs)以弯曲的射电瓣为特征,这种独特形态主要由星系在星系团内的运动导致,期间射电喷流受到星系团内介质的偏折。本研究采用结合基于深度学习的射电源探测器与目视检查的组合方法,从Faint Images of the Radio Sky at Twenty-centimeters(二十厘米射电天空暗弱图像,简称FIRST)巡天图像中搜寻BTRGs。研究最终构建了包含4876个BTRGs的星表,其中3871个为新发现的天体。根据星系两个喷流间张角的分类方案,BTRGs通常被分为宽角尾(WAT)源和窄角尾(NAT)源两类;本次构建的星表包含4424个WAT和652个NAT,其中4193个BTRGs已识别出光学对应体。该星表覆盖的光度范围为$1.91\times10^{20} \leq L_{\rm 1.4\thinspace GHz} \leq 1.45\times10^{28}$ ${\rm W/Hz}$,红移范围为$z=0.0023$至$z=3.43$。研究还呈现了这些BTRGs的各类物理性质及其统计结果,特别地,通过最近邻方法发现,星表中有1825个BTRGs隶属于已发表文献报道的星系团。
英文摘要:
Bent-tail radio galaxies (BTRGs) are characterized by bent radio lobes. This unique shape is mainly caused by the movement of the galaxy within a cluster, during which the radio jets are deflected by the intra-cluster medium. A combined method, which involves a deep learning-based radio source finder along with visual inspection, has been utilized to search for BTRGs from the Faint Images of the Radio Sky at Twenty-centimeters survey images. Consequently, a catalog of 4876 BTRGs has been constructed, among which 3871 are newly discovered. Based on the classification scheme of the opening angle between the two jets of the galaxy, BTRGs are typically classified as either wide-angle-tail (WAT) sources or narrow-angle-tail (NAT) sources. Our catalog comprises 4424 WATs and 652 NATs. Among these, optical counterparts are identified for 4193 BTRGs. This catalog covers luminosities in the range of $1.91\times10^{20} \leq L_{\rm 1.4\,GHz} \leq 1.45\times10^{28}$ ${\rm W\,Hz^{-1}}$ and redshifts from $z = 0.0023$ to $z = 3.43$. Various physical properties of these BTRGs and their statistics are presented. Particularly, by the nearest neighbor method, we found that 1825 BTRGs in this catalog belong to galaxy clusters reported in literature.
RGC-Bent: A Novel Dataset for Bent Radio Galaxy Classification
1 Center for Computational \& Data Sciences, Independent University, Bangladesh 2 Center for Astronomy, Space Science;Astrophysics, Independent University, Bangladesh 3 Center for Astrophysics;Space Science, New York University Abu Dhabi
A new catalogue of head-tail radio galaxies from LoTSS DR1
头-尾(HT)射电星系的独特形态表明,射电喷流和它们的星系团内介质强烈相互作用。我们使用LOFAR两米巡天首次发布的144 MHz数据(LoTSS DR 1)对HT射电星系进行了系统的搜索。本文给出了一个包含55个新HT射电星系的星表,其中10个是窄角尾源(NAT),45个是广角尾源(WATS)。NAT的特点是尾部弯曲成一个狭窄的“V”形,开口角度小于90度。WAT射电星系喷流之间的张开角大于90度,呈现出宽的“C”状形态。我们发现,在这篇文章中报道的55个HT射电星系中,有30个与已知的星系团有关。本文中介绍的大多数源的红移为$<$ 0.5。介绍了这些HT射电星系的各种物理性质和统计研究。
Identification and Study of Irregular Radio Sources with SKA Continuum Surveys
National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);Guangxi Normal University(广西师范大学);Xiamen University(厦门大学);Jadavpur University(贾达普大学);Zhejiang University(浙江大学)
Wiggling Through the ICM: Multi-Resolution Radio Imaging of a Tailed Radio Galaxy in MACS J1354.6+7715
Durham University(杜伦大学);Indian Institute of Science Education and Research Mohali(印度科学教育研究所莫哈利分校);Institute for Computational Cosmology, Department of Physics, Durham University(杜伦大学物理学院计算宇宙学研究所);National Centre for Radio Astrophysics, TIFR(印度天文物理国家射电中心,塔塔基础研究院);Centre for Space Research, North-West University(西北大学空间研究中心)
Origin and Evolution of the $Ω$ Structure in the Head-Tail Radio Galaxy of Abell 3322
National Astronomical Observatory of Japan(日本国立天文台);Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University(名古屋大学小林益川粒子与宇宙起源研究所);Institute for Cosmic Ray Research, The University of Tokyo(东京大学宇宙射线研究所);Division of Science, National Astronomical Observatory of Japan(日本国立天文台理学科);Departure of Physics, Nagoya University(名古屋大学物理学部);Max Planck Institute for Radio Astronomy(马克斯·普朗克射电天文研究所);Graduate School of Science and Technology for Innovation, Yamaguchi University(山口大学创新理工学研究科);Department of Physics, Yamagata University(山形大学物理学系)
A VLA Study of the Disturbed Massive Cluster PLCK G165.7 + 67.0 and Its Two Narrow Angle Tail Galaxies
Steward Observatory, University of Arizona(亚利桑那大学斯图尔德天文台);Department of Physics, Massachusetts Institute of Technology(麻省理工学院物理系);Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México(墨西哥国立自治大学射电天文学与天体物理研究所);School of Earth and Space Exploration, Arizona State University(亚利桑那州立大学地球与空间探索学院);Department of Space, Earth & Environment, Chalmers University of Technology(查尔姆斯理工大学空间、地球与环境系);Joint ALMA Observatory(ALMA联合天文台);Michigan State University(密歇根州立大学);Department of Astronomy, University of Massachusetts, Amherst(马萨诸塞大学阿默斯特分校天文学系);Space Telescope Science Institute(太空望远镜科学研究所)
Size measurements and characterization of the astrophysical properties of multiple-component radio-AGNs in the ROGUE I catalog
Astronomical Observatory of the Jagiellonian University(雅盖隆大学天文台);National Center for Nuclear Research(国家核研究中心);Wits Centre for Astrophysics, School of Physics, University of the Witwatersrand(威特沃特斯兰德大学物理学院天体物理中心);Department of Theoretical Physics and Astrophysics, Faculty of Science, Masaryk University(马萨里克大学理学院理论物理与天体物理学系);LUX, Observatoire de Paris, Université PSL, Sorbonne Université, CNRS(巴黎天文台,PSL大学,索邦大学,法国国家科学研究中心);Departamento de Fìsica–CFM, Universidade Federal de Santa Catarina(圣卡塔琳娜联邦大学物理系);Department of Physics, Indian Institute of Technology Madras(印度金奈理工学院物理系)
The MeerKAT 1.3 GHz Survey of the Large Magellanic Cloud
National Radio Astronomy Observatory(国家无线电天文台);South African Radio Astronomy Observatory(南非无线电天文台);Western Sydney University(西悉尼大学);Faculty of Engineering, Gifu University(岐阜大学工程学院);Centre for Radio Astronomy Techniques and Technologies (RATT), Department of Physics and Electronics, Rhodes University(罗德斯大学物理与电子学院射电天文技术与方法中心);Institute for Radio Astronomy, National Institute of Astrophysics (INAF IRA)(意大利国家天体物理研究所射电天文研究所);Lennard-Jones Laboratories, Keele University(基尔大学伦纳德-琼斯实验室)