586 citations · 2.2k across the 25 of their papers we have counts for
26 papers
Very Long Baseline Interferometry with the SKA Observatory
J. F. Radcliffe, J. Yang, Z. Paragi +129
Very Long Baseline Interferometry (VLBI) is a fundamental technique that combines signals from telescopes separated by thousands of kilometres to obtain some of the highest-resolut…
The diverse morphologies and evolution of low-luminosity edge-brightened radio galaxies
B. Barkus, J. H. Croston, B. Mingo +3
Fanaroff-Riley class I (FRI) radio galaxies show centre-brightened emission from disrupted lower power jets, while traditionally more luminous class II (FRIIs), are edge-brightened…
Radio studies of supernovae 1979C, 1986J and 2006X with LOFAR
Peter Lundqvist, Deeepika Venkattu, Miguel Pérez Torres +3
We present LOw Frequency ARray (LOFAR) studies of supernovae SN 1979C, SN 1986J, and SN 2006X, focusing on new observations from the LOFAR Two-metre Sky Survey (LoTSS) and the Inte…
The high-redshift radio galaxy 3C 294 at low frequencies: radio detection of the X-ray Ghost
Vijay H. Mahatma, Andrew C. Fabian, Leah K. Morabito
We report on the very first radio detection associated with the peculiar hourglass-morphology X-rays surrounding 3C 294 at z=1.8. Using International Low Frequency Array (LOFAR) da…
A decade of sub-arcsecond imaging with the International LOFAR Telescope
Leah K. Morabito, Neal Jackson, Jurjen de Jong +7
The International LOFAR Telescope (ILT) is a pan-European radio interferometer with baselines up to 2,000 km. This provides sub-arcsecond resolution at frequencies of <200 MHz. Sin…
Non-thermal emission in galaxy groups at extremely low frequency: the case of A1213
T. Pasini, V. H. Mahatma, M. Brienza +7
Galaxy clusters and groups are the last link in the chain of hierarchical structure formation. Their environments can be significantly affected by outbursts from AGN, especially in…
JWST/NIRSpec WIDE survey: a z=4.6 low-mass star-forming galaxy hosting a jet-driven shock with low ionisation and solar metallicity
Francesco D'Eugenio, Roberto Maiolino, Vijay H. Mahatma +14
We present NIRSpec/MSA observations from the JWST large-area survey WIDE, targeting the rest-frame UV-optical spectrum of Ulema, a radio-AGN host at redshift z=4.6348. The low-reso…
The LOFAR Two-Metre Sky Survey (LoTSS): VI. Optical identifications for the second data release
M. J. Hardcastle, M. A. Horton, W. L. Williams +49
The second data release of the LOFAR Two-Metre Sky Survey (LoTSS) covers 27% of the northern sky, with a total area of deg. The high angular resolution of LOFAR wi…
The Dynamics and Energetics of Remnant and Restarting RLAGN
Vijay H. Mahatma
In this article, I review past, current, and future advances on the study of radio-loud AGN (RLAGN; radio-loud quasars and radio galaxies) lifecycles exclusively in the remnant and…
A low frequency sub-arcsecond view of powerful radio galaxies in rich-cluster environments: 3C 34 and 3C 320
V. H. Mahatma, A. Basu, M. J. Hardcastle +2
Models of radio galaxy physics have been primarily based on high frequency (1 GHz) observations of their jets, hotspots, and lobes. Without highly resolved low frequency…
The LOFAR Two-metre Sky Survey -- V. Second data release
T. W. Shimwell, M. J. Hardcastle, C. Tasse +103
In this data release from the LOFAR Two-metre Sky Survey (LoTSS) we present 120-168MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at ap…
VLA Snapshot Continuum Survey of FRI Quasar Candidates Selected from the LOFAR Two-Metre Sky Survey (LoTSS)
Gülay Gürkan, Judith Croston, Martin Hardcastle +3
The radiative and jet power in active galactic nuclei is generated by accretion of material on to supermassive galactic-centre black holes. For quasars, where the radiative power i…
Multi-frequency characterisation of remnant radio galaxies in the Lockman Hole field
N. Jurlin, M. Brienza, R. Morganti +4
Remnant radio galaxies represent an important phase in the life-cycle of radio active galactic nuclei. It is suggested that in this phase, the jets have switched off and the extend…
Raining in MKW 3s: a Chandra-MUSE analysis of X-ray cold filaments around 3CR 318.1
A. Jimenez-Gallardo, F. Massaro, B. Balmaverde +23
We present the analysis of X-ray and optical observations of gas filaments observed in the radio source 3CR 318.1, associated with NGC 5920, the Brightest Cluster Galaxy (BCG) of M…
A low frequency study of linear polarization in radio galaxies
Vijay H. Mahatma, Martin J. Hardcastle, Jeremy Harwood +4
Radio galaxies are linearly polarized -- an important property that allows us to infer the properties of the magnetic field of the source and its environment. However at low freque…
The LOFAR Two Metre Sky Survey: Deep Fields Data Release 1 -- III. Host-galaxy identifications and value added catalogues
R. Kondapally, P. N. Best, M. J. Hardcastle +40
We present the source associations, cross-identifications, and multi-wavelength properties of the faint radio source population detected in the deep tier of the LOFAR Two Metre Sky…
Extremely deep 150 MHz source counts from the LoTSS Deep Fields
S. Mandal, I. Prandoni, M. J. Hardcastle +19
With the advent of new generation low-frequency telescopes, such as the LOw Frequency ARray (LOFAR), and improved calibration techniques, we have now started to unveil the sub GHz…
Radio spectral properties and jet duty cycle in the restarted radio galaxy 3C388
M. Brienza, R. Morganti, J. Harwood +9
Restarted radio galaxies represent a unique tool to investigate the duty cycle of the jet activity in Active Galactic Nuclei. Due to a sharp discontinuity of the GHz spectral index…
The life cycle of radio galaxies in the LOFAR Lockman Hole field
N. Jurlin, R. Morganti, M. Brienza +13
Radio galaxies are known to go through cycles of activity, where phases of apparent quiescence can be followed by repeated activity of the central supermassive black hole. A better…
Investigating the spectral age problem with powerful radio galaxies
Vijay H. Mahatma, Martin J. Hardcastle, Judith H. Croston +3
The 'spectral age problem' is our systematic inability to reconcile the maximum cooling time of radiating electrons in the lobes of a radio galaxy with its age as modelled by the d…
Revisiting the Fanaroff-Riley dichotomy and radio-galaxy morphology with the LOFAR Two-Metre Sky Survey (LoTSS)
B. Mingo, J. H. Croston, M. J. Hardcastle +15
The relative positions of the high and low surface brightness regions of radio-loud active galaxies in the 3CR sample were found by Fanaroff and Riley to be correlated with their l…
Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources
M. J. Hardcastle, W. L. Williams, P. N. Best +20
We constructed a sample of 23,344 radio-loud active galactic nuclei (RLAGN) from the catalogue derived from the LOFAR Two-Metre Sky Survey (LoTSS) survey of the HETDEX Spring field…
The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue
W. L. Williams, M. J. Hardcastle, P. N. Best +38
The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168 MHz survey of the Northern sky with diverse and ambitious science goals. Many of the scienti…
The LOFAR Two-metre Sky Survey - II. First data release
T. W. Shimwell, C. Tasse, M. J. Hardcastle +104
The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168MHz survey of the entire northern sky for which observations are now 20% complete. We present…