489 citations · 919 across the 32 of their papers we have counts for
33 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…
Polarisation and Faraday rotation measure imaging at metre wavelengths with sub-arcsecond resolution: a foundational calibration strategy
R. J. van Weeren, J. M. G. H. J. de Jong, X. K Le Saux +12
Low-frequency radio polarimetric observations provide a powerful probe of magnetic fields in astrophysical sources and the intervening medium, as well as magnetospheric emission fr…
A population-based approach to understanding radio AGN feedback with LOFAR: The LoTSS Deep Fields
J. C. S. Pierce, F. Sweijen, M. J. Hardcastle +3
Feedback from radio AGN jets is regularly implemented into contemporary models of galaxy evolution to offset radiative cooling in the large-scale environments in which they typical…
The LOFAR sub-arcsecond view of the high-redshift radio relic in PSZ2G091.83+26.11
G. Di Gennaro, R. Timmerman, M. Hoeft +14
Enhanced inverse Compton (IC) losses at high redshift steepen diffuse radio spectra in galaxy clusters, making low-frequency (~100 MHz) observations favorable. However, low-frequen…
The LOFAR Two-metre Sky Survey: VII. Third Data Release
T. W. Shimwell, M. J. Hardcastle, C. Tasse +99
We present the third data release of the LOFAR Two-metre Sky Survey (LoTSS-DR3). The survey images cover 88% of the northern sky and were created from 12,950 hrs of data (18.6 PB)…
The sub-arcsecond ILT view of the Boötes Deep Field: A link between low-frequency kiloparsec radio morphology and AGN driven ionised outflows
Emmy L. Escott, Leah K. Morabito, Frits Sweijen +8
Active Galactic Nuclei (AGN) outflows can regulate host galaxy evolution via AGN feedback. Ionised gas outflows have been linked to enhanced radio emission. In the first paper of t…
Scalable and robust wide-field facet calibration with LOFAR's longest baselines
J. M. G. H. J. de Jong, L. Veefkind, R. J. van Weeren +8
Recent work has successfully achieved sub-arcsecond wide-field imaging with high-band observations from the Low Frequency Array (LOFAR). However, the scalability of this work remai…
The Crab Nebula at subarcsecond resolution with the International LOFAR Telescope
M. Arias, R. Timmerman, F. Sweijen +2
We present International LOw Frequency ARray (LOFAR) Telescope (ILT) observations of the Crab Nebula, the remnant of a core-collapse supernova explosion observed by astronomers in…
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…
Unlocking ultra-deep wide-field imaging with sidereal visibility averaging
J. M. G. H. J. de Jong, R. J. van Weeren, T. J. Dijkema +3
Producing ultra-deep high-angular-resolution images with current and next-generation radio interferometers introduces significant computational challenges. In particular, the imagi…
The LOFAR Two-metre Sky Survey: Deep Fields Data Release 2. I. The ELAIS-N1 field
T. W. Shimwell, C. L. Hale, P. N. Best +29
We present the final 6'' resolution data release of the ELAIS-N1 field from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey Deep Fields project (LoTSS Deep). The 144MHz images…
Monster radio jet (>66 kpc) observed in quasar at z5
Anniek J. Gloudemans, Frits Sweijen, Leah K. Morabito +6
We present the discovery of a large extended radio jet associated with the extremely radio-loud quasar J1601+3102 at from sub-arcsecond resolution imaging at 144 MHz with…
A hidden Active Galactic Nuclei population: the first radio luminosity functions constructed by physical process
Leah K. Morabito, R. Kondapally, P. N. Best +10
Both star formation (SF) and Active Galactic Nuclei (AGN) play an important role in galaxy evolution. Statistically quantifying their relative importance can be done using radio lu…
Into the depths: Unveiling ELAIS-N1 with LOFAR's deepest sub-arcsecond wide-field images
J. M. G. H. J. de Jong, R. J. van Weeren, F. Sweijen +11
We present the deepest wide-field 115-166 MHz image at sub-arcsecond resolution spanning an area of 2.5 by 2.5 degrees centred at the ELAIS-N1 deep field. To achieve this, we impro…
Characterization of the decametre sky at subarcminute resolution
C. Groeneveld, R. J. van Weeren, E. Osinga +11
The largely unexplored decameter radio band (10-30 MHz) provides a unique window for studying a range of astronomical topics, such as auroral emission from exoplanets, inefficient…
The first high-redshift cavity power measurements of cool-core galaxy clusters with the International LOFAR Telescope
R. Timmerman, R. J. van Weeren, A. Botteon +3
Radio-mode feedback associated with the active galactic nuclei (AGN) at the cores of galaxy clusters injects large amount of energy into the intracluster medium (ICM), offsetting r…
Nuclear regions as seen with LOFAR international baselines: A high-resolution study of the recurrent activity
N. Jurlin, R. Morganti, F. Sweijen +4
Radio galaxies dominate the radio sky and are essential to the galaxy evolution puzzle. High-resolution studies of statistical samples of radio galaxies are expected to shed light…
1-arcsecond imaging of ELAIS-N1 field at 144MHz using the LoTSS survey with international LOFAR telescope
Haoyang Ye, Frits Sweijen, Reinout van Weeren +10
We present the first wide area (2.5 x 2.5 deg^2) LOFAR High Band Antenna image at a resolution of 1.2'' x 2'' with a median noise of approximately 80 microJy per beam. It was made…
VLBI Imaging of high-redshift galaxies and protoclusters at low radio frequencies with the International LOFAR Telescope
C. M. Cordun, R. Timmerman, G. K. Miley +4
It has long been known that luminous, ultra-steep spectrum radio sources are preferentially associated with massive galaxies at high redshifts. Here we describe a pilot project dir…
V-LoTSS: The Circularly-Polarised LOFAR Two-metre Sky Survey
J. R. Callingham, T. W. Shimwell, H. K. Vedantham +44
We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We use the second data release of the 144 MHz LOFAR Two-metr…
Identifying active galactic nuclei via brightness temperature with sub-arcsecond International LOFAR Telescope observations
Leah K. Morabito, F. Sweijen, J. F. Radcliffe +11
Identifying active galactic nuclei (AGN) and isolating their contribution to a galaxy's energy budget is crucial for studying the co-evolution of AGN and their host galaxies. Brigh…
Measuring cavity powers of active galactic nuclei in clusters using a hybrid X-ray-radio method -- A new window on feedback opened by subarcsecond LOFAR-VLBI observations
R. Timmerman, R. J. van Weeren, A. Botteon +5
Measurements of the quantity of radio-mode feedback injected by an active galactic nucleus into the cluster environment have mostly relied on X-ray observations, which reveal cavit…
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…
Deep sub-arcsecond widefield imaging of the Lockman Hole field at 144 MHz
F. Sweijen, R. J. van Weeren, H. J. A. Röttgering +11
High quality low-frequency radio surveys have the promise of advancing our understanding of many important topics in astrophysics, including the life cycle of active galactic nucle…