We present deep 15.7-GHz observations made with the Arcminute Microkelvin Imager Large Array in two fields previously observed as part of the Tenth Cambridge (10C) survey. These observations allow the source counts to be calculated down to 0.1 mJy, a factor of five deeper than achieved by the 10C survey. The new source counts are consistent with the extrapolated fit to the 10C source count, and display no evidence for either steepening or flattening of the counts. There is thus no evidence for the emergence of a significant new population of sources (e.g. starforming) at 15.7 GHz flux densities above 0.1 mJy, the flux density level at which we expect starforming galaxies to begin to contribute. Comparisons with the de Zotti et al. model and the SKADS Simulated Sky show that they both underestimate the observed number of sources by a factor of two at this flux density level. We suggest that this is due to the flat-spectrum cores of radio galaxies contributing more significantly to the counts than predicted by the models.
The Quasar Feedback Survey: Revealing the importance of sensitive radio imaging for AGN identification deeper into the radio-quiet regime
Newcastle University(纽卡斯尔大学);National Centre for Radio Astrophysics (NCRA) - Tata Institute of Fundamental Research (TIFR)(国家射电天体物理中心(NCRA)- 塔塔基础研究所(TIFR));Durham University(杜伦大学);European Southern Observatory (ESO)(欧洲南方天文台(ESO));Institut de Radioastronomie Millimétrique (IRAM)(毫米波射电天体物理研究所(IRAM));University of Hertfordshire(赫特福德大学)
The VLA-COSMOS 3 GHz Large Project: Polarised source counts and catalogue
Max-Planck Institüt für Radioastronomie(马克斯·普朗克射电天文研究所);Inter-University Institute for Data Intensive Astronomy, Department of Astronomy, University of Cape Town(开普敦大学天文学系数据密集型天文学跨大学研究所);Department of Physics, University of Pretoria(比勒陀利亚大学物理系);Wits Centre for Astrophysics, University of the Witwatersrand(威特沃特斯兰德大学天体物理学中心);Department of Physics, University of Zagreb(萨格勒布大学物理系);Max-Planck-Institute für Astronomie(马克斯·普朗克天体物理研究所);Istituto di Radioastronomia(无线电天文学研究所);Division of Physics, Math and Astronomy, California Institute of Technology(加州理工学院物理、数学和天文学部);Indian Institute of Technology Kanpur(坎普尔印度理工学院)
The MeerKAT Massive Distant Clusters Survey: a search for diffuse radio emission in 30 massive SZ-selected clusters at $z > 1$
University of the Witwatersrand(威特沃特斯兰德大学);University of KwaZulu-Natal(夸祖鲁-纳塔尔大学);Rhodes University(罗德斯大学);South African Radio Astronomy Observatory(南非射电天文观测台)
Going deeper into the dark with COSMOS-Web: JWST unveils the total contribution of Radio-Selected NIRfaint galaxies to the cosmic Star Formation Rate Density
VLA cm-wave survey of young stellar objects in the Oph A cluster: constraining extreme UV- and X-ray-driven disk photo-evaporation -- A pathfinder for Square Kilometre Array studies