EMU and the DRAGNs I: A Catalogue of DRAGNs
arXiv:2507.23337 · doi:10.1017/pasa.2025.10076
Abstract
We present a catalogue of 3557 Double Radio sources associated with Active Galactic Nuclei (DRAGNs) from the First Pilot Survey of the Evolutionary Map of the Universe (EMU), observed at 944 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope, covering 270 deg^2. We have extracted and identified each source by eye, tagged it with a morphological type and measured its parameters. The resulting catalogue will be used in subsequent papers to explore the properties of these sources, to train machine-learning algorithms for the detection of these sources in larger fields, and to compare with the results of Citizen Science projects, with the ultimate goal of understanding the physical processes that drive DRAGNs. Compared with earlier, lower sensitivity, catalogues, we find more diffuse structure and a plethora of more complex structures, ranging from wings of radio emission on the side of the jets, to types of object which have not been seen in earlier observations. As well as the well-known FR1 and FR2 sources, we find significant numbers of rare types of radio source such as Hybrid Morphology Radio Sources and one-sided jets, as well as a wide range of bent-tail and head-tail sources.
arXiv commentAccepted by PASA
References in corpus (58)
- Galaxy Bimodality due to Cold Flows and Shock Heating
- A 20cm VLA Survey of Abell Clusters of Galaxies VI. Radio/Optical Luminosity Functions
- The unWISE Catalog: Two Billion Infrared Sources from Five Years of WISE Imaging
- Radio galaxies with a `double-double' morphology: I - Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei
- The matter content of the jet in M87: evidence for an electron-positron jet
- Dynamical models for jet deceleration in the radio galaxy 3C 31
- A Magnetically-Switched, Rotating Black Hole Model For the Production of Extragalactic Radio Jets and the Fanaroff and Riley Class Division
- Deep ATLAS radio observations of the CDFS-SWIRE field
- Relativistic Jets and the Fanaroff-Riley Classification of Radio Galaxies
- Three-dimensional Relativistic MHD Simulations of Active Galactic Nuclei Jets: Magnetic Kink Instability and Fanaroff-Riley Dichotomy
- A numerical simulation of the evolution and fate of a FRI jet. The case of 3C 31
- Luminosity function, sizes and FR dichotomy of radio-loud AGN
- FIRST `Winged' and `X'-shaped Radio Source Candidates
- Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations
- On the deceleration of FRI jets: mass loading by stellar-winds
- Search and modelling of remnant radio galaxies in the LOFAR Lockman Hole field
- Galaxy Cluster Environments of Radio Sources
- The Bright Quasar 3C 273
- Source-finding for the Australian Square Kilometre Array Pathfinder
- Alignments of Radio Galaxies in Deep Radio Imaging of ELAIS N1
- LoTSS DR1: Double-double radio galaxies in the HETDEX field
- The genesis of morphologies in extended radio sources: X-shapes, off-axis distortions and giant radio sources
- unWISE Coadds: The Five-year Data Set
- J0041+3224: a new double-double radio galaxy
- Morphological Annotations for Groups in the FIRST Database
- Three episodes of jet activity in the FRII radio galaxy B0925+420
- Extragalactic Radio Continuum Surveys and the Transformation of Radio Astronomy
- Hybrid morphology radio sources from FIRST survey
- A new connection between the opening angle and the large-scale morphology of extragalactic radio sources
- Cataloging the radio-sky with unsupervised machine learning: a new approach for the SKA era
- Radio Galaxy Zoo: A Search for Hybrid Morphology Radio Galaxies
- Unveiling the cause of hybrid morphology radio sources (HyMoRS)
- Unveiling the rarest morphologies of the LOFAR Two-metre Sky Survey radio source population with self-organised maps
- Catching butterflies in the sky: Extended catalog of winged or X-shaped radio sources from the latest FIRST data release
- WATCAT: a tale of wide-angle tailed radio galaxies
- Head-Tail Galaxies: Beacons of High-Density Regions in Clusters
- A Candidate Dual AGN in a Double-peaked Emission-line Galaxy with Precessing Radio Jets
- Investigating the spectral age problem with powerful radio galaxies
- Radio Galaxy Zoo: Cosmological Alignment of Radio Sources
- X-shaped Radio Galaxies: Optical Properties, Large-scale Environment and Relationship to Radio Structure
- FIRST winged radio galaxies with X and Z symmetry
- Tailed radio galaxies as tracers of galaxy clusters. Serendipitous discoveries with the GMRT
- A New Catalog of Head Tail Radio Galaxies from the VLA FIRST Survey
- A Quick Look at the 3GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
- MeerKAT view of the Dancing Ghosts -- Peculiar Galaxy Pair PKS 2130-538 in Abell 3785
- The Fanaroff-Riley Transition and the Optical Luminosity of the Host Elliptical Galaxy
- Spectral Structure in FRII Radio Galaxies and Jets
- A Multimodal Dataset and Benchmark for Radio Galaxy and Infrared Host Detection
- Gems of the Galaxy Zoos -- a Wide-Ranging Hubble Space Telescope Gap-Filler Program
- The role of environment in the observed Fundamental Plane of radio Active Galactic Nuclei
- RAiSE X: searching for radio galaxies in X-ray surveys
- Identifying anomalous radio sources in the EMU Pilot Survey using a complexity-based approach
- Revisiting the alignment of radio galaxies in the ELAIS-N1 field
- Search for hybrid morphology radio galaxies from FIRST survey at 1400 MHz
- Alignment in the orientation of LOFAR radio sources
- The Host Galaxies of Hybrid Morphology Radio Sources
- Rotation and flipping invariant self-organizing maps with astronomical images: A cookbook and application to the VLA Sky Survey QuickLook images
- Identification of 4876 Bent-Tail Radio Galaxies in the FIRST Survey Using Deep Learning Combined with Visual Inspection